1
|
Wang L, Lu J, Zhang P, Su J, Han J. Toward exclusive stereocomplex crystallization of high-molecular-weight poly(L-lactic acid)/poly(D-lactic acid) blends with outstanding heat resistance via incorporating selective nucleating agents. Int J Biol Macromol 2024; 262:129976. [PMID: 38331074 DOI: 10.1016/j.ijbiomac.2024.129976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/23/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024]
Abstract
In high molecular weight poly(L-lactic acid)/poly(D-lactic acid) (HMW PLLA/PDLA) blends, the construction of exclusive stereocomplex crystals (SC) with high crystallinity and strong melt memory remains a great challenge. In the present study, various norbornene dicarboxylate complexes (TMXNa, Mg, Al, or Ca) were employed as the stereo-selective nucleating agents (NAs), and their effect on the crystallization characteristics, rheological behavior, and heat resistance of PLLA/PDLA blends were thoroughly studied. Strikingly, TMX-Al facilitated the construction of exclusive SC with over 50 % crystallinity and excellent melt memory. The dense SC crystals network structure boosted the heat resistance of L/D-xAl blends with a VST as high as 145 °C. The strengthened intermolecular interaction fostered the generation of pre-ordered structure in the melt and enhanced chain interdiffusion, which contributed to intermolecular nucleation and SC crystallization in L/D-xAl blend. This study opens up a new avenue for melt processing and application development of SC-PLA materials.
Collapse
Affiliation(s)
- Lunhe Wang
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Jun Lu
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Pengcheng Zhang
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Juanjuan Su
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China.
| | - Jian Han
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China.
| |
Collapse
|
2
|
Li W, Cao J, Fu L, Liu F, Huang Y, He Y, Jiang L, Dan Y. Effect of stereo-complexation on crystallization behavior and barrier properties of poly-lactide. Int J Biol Macromol 2024; 261:129834. [PMID: 38302029 DOI: 10.1016/j.ijbiomac.2024.129834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 01/26/2024] [Accepted: 01/27/2024] [Indexed: 02/03/2024]
Abstract
The unique stere-complex crystal formed by poly(ʟ-lactide)/poly(ᴅ-lactide) (PLLA/PDLA) has a significant impact on properties of poly-lactide materials and is considered an effective means to improve the barrier properties of poly-lactide (PLA). In this work, poly-lactide films with different aggregate structures were prepared and the relationship of aggregate structure and barrier properties were explored. The results show that the crystal structure including crystallinity and crystal forms can be controlled by adjusting the isothermal crystallization time and crystallization temperature during the molding process. PLLA/PDLA composite films contain both homochiral crystallites and stereo-complex crystallites, and there is a synergistic crystallization effect between the two of them, which provides the composite films with high crystallinity and excellent barrier properties. Compared to the PLLA with homochiral crystallites, the PLLA/PDLA composite film with only stereo-complex crystallites exhibits higher barrier properties. The linear correlation between the crystallinity and the barrier properties is weak due to the changes in crystallization behavior and then the structure of poly-lactide caused by stereo-complexation. The linear correlation between the crystallinity and the barrier properties of the blend film is strong in the low crystallinity but weak at high crystallinity. Compared to homochiral crystallites, stereo-complex crystallites exhibits lower crystallinity dependence. It has been proven that different crystal forms have different design ideas for preparing high-barrier films, but the stereo-complexation resulting from the intermolecular forces between PLLA and PDLA having complementary chemical structure, is an effective method for enhancing the barrier performances of poly-lactide sustainably.
Collapse
Affiliation(s)
- Wanling Li
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Jilong Cao
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Ling Fu
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Fei Liu
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Yun Huang
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Yuan He
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Long Jiang
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
| | - Yi Dan
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
| |
Collapse
|
3
|
Zhao R, Cai S, Zhao Y, Ning X. Enhanced stereocomplex crystalline polylactic acids in melt processed enantiomeric bicomponent fiber configurations. Int J Biol Macromol 2023; 253:127123. [PMID: 37774817 DOI: 10.1016/j.ijbiomac.2023.127123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 09/10/2023] [Accepted: 09/26/2023] [Indexed: 10/01/2023]
Abstract
The formation of stereocomplex crystalline domains in the bicomponent fiber melt spinning of enantiomeric polylactic acids (PLAs) is systematically explored and enhanced. Here we report a polycrystalline morphology where distinctly different crystalline regions are formed and aligned along the longitudinal direction of the fiber. This approach employs side-by-side and sheath-core bicomponent melt spinning configurations where the two components are the enantiomeric pairs of poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA). We demonstrate the formation of the PLA stereocomplexes at the junction interphase through the melt spinning process which subsequently crystallize into a round fibers with stereocomplex and homogeneous crystal lamella morphologies. The fiber morphologies and crystallinities of the melt processed fiber are substantially different from the solution based bicomponent spinning system reported in the prior literature. Furthermore, the different molecular weight in the PLLA/PDLA pairing are found to be crucial to the structural development and properties of the PLA polycrystalline materials. The solid-state annealing does not change the crystal distribution of the crystalline domains and stereocomplex crystalline state, it just enhances the homo-crystallinity in the peripheral of the bicomponent fibers.
Collapse
Affiliation(s)
- Renhai Zhao
- Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China; Shandong Center for Engineered Nonwovens, Qingdao University, Qingdao 266071, China
| | - Shunzhong Cai
- Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China; Shandong Center for Engineered Nonwovens, Qingdao University, Qingdao 266071, China
| | - Yintao Zhao
- Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China; Shandong Center for Engineered Nonwovens, Qingdao University, Qingdao 266071, China
| | - Xin Ning
- Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China; Shandong Center for Engineered Nonwovens, Qingdao University, Qingdao 266071, China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
| |
Collapse
|
4
|
Suharman, Heah WY, Yamagishi H, Yamamoto Y. Poly(lactic acid) stereocomplex microspheres as thermally tolerant optical resonators. NANOSCALE 2023; 15:19062-19068. [PMID: 37987533 DOI: 10.1039/d3nr05318k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Thermally tolerant polymer optical resonators are fabricated from a stereocomplex of poly(L-lactic acid) and poly(D-lactic acid) through the oil-in-water miniemulsion method. The thermal stability of the microspheres of the stereocomplex poly(lactic acid) (SC-PLA) is superior to that of the homochiral poly(lactic acid) (HC-PLA). As a result of the high thermal stability, the optical resonator properties of the SC-PLA microspheres are preserved at an elevated temperature of up to 230 °C, which is 70 °C higher than that of microspheres formed from HC-PLA.
Collapse
Affiliation(s)
- Suharman
- Department of Material Innovation, Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
- Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Jl. Dr. T. Mansur No. 9, Padang Bulan, Medan Baru, Medan, Sumatera Utara 20222, Indonesia
| | - Wey Yih Heah
- Department of Material Science, Institute of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.
| | - Hiroshi Yamagishi
- Department of Material Innovation, Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
- Department of Material Science, Institute of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.
| | - Yohei Yamamoto
- Department of Material Innovation, Graduate School of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
- Department of Material Science, Institute of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.
| |
Collapse
|
5
|
Jin F, Huang Z, Zheng Y, Sun C, Kafle N, Ma J, Pan P, Miyoshi T. Impact of Entanglement on Folding of Semicrystalline Polymer during Crystallization. ACS Macro Lett 2023; 12:1138-1143. [PMID: 37503873 DOI: 10.1021/acsmacrolett.3c00364] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Upon cooling, semicrystalline polymers experience crystallization and form alternatively stacked layers consisting of thin crystal lamellae and amorphous ones. The unique morphology, crystallinity, and crystallization kinetics highly depend on the molecular weight. Therefore, it is deduced that entanglement impacts crystallization kinetics, as well as hierarchically crystalline structures. However, the impact of entanglement on folded crystalline chains has not been well understood due to experimental difficulties. In this work, chain-folding structures for seven 13C CH3 labeled poly(l-lactic acid)s with various molecular weights (Mws) were investigated by 13C-13C double quantum NMR spectroscopy. As a result, chain-folding events were categorized into three different Mw regimes: (i) The lowest Mw sample (2K g/mol) adopts an extended chain conformation (folding number, n = 0) (regime I); (ii) Intermediate Mw ones possess mixtures of non- and once-folded structures, and the once-folded fraction suddenly increases above the entanglement length (Me), up to Mw = 45K g/mol (regime II); (iii) The high Mw ones (Mw > 45K g/mol) adopt the highest chance for an adjacent re-entry structure with n = 1.0 in the well-developed entangled network (regime III). It was suggested that entanglement induces folding of the semicrystalline polymer.
Collapse
Affiliation(s)
- Fan Jin
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Zheng Huang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Ying Zheng
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
- Institute of Zhejiang University-Quzhou, 99 Zheda Road, Quzhou 324000, China
| | - Chenxuan Sun
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
- Institute of Zhejiang University-Quzhou, 99 Zheda Road, Quzhou 324000, China
| | - Navin Kafle
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Jiayang Ma
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
- Institute of Zhejiang University-Quzhou, 99 Zheda Road, Quzhou 324000, China
| | - Toshikazu Miyoshi
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325-3909, United States
| |
Collapse
|
6
|
Competition effect of solid-state stretching induced orientation and phase separation on stereocomplex crystallization of PLLA/PDLA during annealing. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
|
7
|
He Y, Liu D, Wang J, Pan P, Hu W. Tammann Analysis of the Molecular Weight Selection of Polymorphic Crystal Nucleation in Symmetric Racemic Poly(lactic acid) Blends. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00457] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yucheng He
- State Key Laboratory of Coordinate Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Dan Liu
- State Key Laboratory of Coordinate Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Jiping Wang
- State Key Laboratory of Coordinate Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering, College of Biological and Chemical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wenbing Hu
- State Key Laboratory of Coordinate Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| |
Collapse
|
8
|
Farahani A, Zarei-Hanzaki A, Abedi HR, Tayebi L, Mostafavi E. Polylactic Acid Piezo-Biopolymers: Chemistry, Structural Evolution, Fabrication Methods, and Tissue Engineering Applications. J Funct Biomater 2021; 12:71. [PMID: 34940550 PMCID: PMC8704870 DOI: 10.3390/jfb12040071] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/11/2021] [Accepted: 11/18/2021] [Indexed: 01/11/2023] Open
Abstract
Polylactide acid (PLA), as an FDA-approved biomaterial, has been widely applied due to its unique merits, such as its biocompatibility, biodegradability, and piezoelectricity. Numerous utilizations, including sensors, actuators, and bio-application-its most exciting application to promote cell migration, differentiation, growth, and protein-surface interaction-originate from the piezoelectricity effect. Since PLA exhibits piezoelectricity in both crystalline structure and an amorphous state, it is crucial to study it closely to understand the source of such a phenomenon. In this respect, in the current study, we first reviewed the methods promoting piezoelectricity. The present work is a comprehensive review that was conducted to promote the low piezoelectric constant of PLA in numerous procedures. In this respect, its chemistry and structural origins have been explored in detail. Combining any other variables to induce a specific application or to improve any PLA barriers, namely, its hydrophobicity, poor electrical conductivity, or the tuning of its mechanical properties, especially in the application of cardiovascular tissue engineering, is also discussed wherever relevant.
Collapse
Affiliation(s)
- Amirhossein Farahani
- Hot Deformation & Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, Iran
| | - Abbas Zarei-Hanzaki
- Hot Deformation & Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, Iran
| | - Hamid Reza Abedi
- School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Tehran 16846-13114, Iran
| | - Lobat Tayebi
- School of Dentistry, Marquette University, Milwaukee, WI 53233, USA;
| | - Ebrahim Mostafavi
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| |
Collapse
|
9
|
Feng L, Bian X, Li G, Chen X. Thermal Properties and Structural Evolution of Poly(l-lactide)/Poly(d-lactide) Blends. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01866] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lidong Feng
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 Jilin, China
- Jilin Biomedical Polymers Engineering Laboratory, Changchun, 130022 Jilin, China
| | - Xinchao Bian
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 Jilin, China
- Jilin Biomedical Polymers Engineering Laboratory, Changchun, 130022 Jilin, China
| | - Gao Li
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 Jilin, China
- Jilin Biomedical Polymers Engineering Laboratory, Changchun, 130022 Jilin, China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 Jilin, China
- Jilin Biomedical Polymers Engineering Laboratory, Changchun, 130022 Jilin, China
| |
Collapse
|
10
|
Park HS, Hong CK. Relationship between the Stereocomplex Crystallization Behavior and Mechanical Properties of PLLA/PDLA Blends. Polymers (Basel) 2021; 13:polym13111851. [PMID: 34199577 PMCID: PMC8199684 DOI: 10.3390/polym13111851] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 11/16/2022] Open
Abstract
Poly (l-lactic acid) (PLLA) is a promising biomedical polymer material with a wide range of applications. The diverse enantiomeric forms of PLLA provide great opportunities for thermal and mechanical enhancement through stereocomplex formation. The addition of poly (d-lactic acid) (PDLA) as a nucleation agent and the formation of stereocomplex crystallization (SC) have been proven to be an effective method to improve the crystallization and mechanical properties of the PLLA. In this study, PLLA was blended with different amounts of PDLA through a melt blending process and their properties were calculated. The effect of the PDLA on the crystallization behavior, thermal, and mechanical properties of PLLA were investigated systematically by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), polarized optical microscopy (POM), dynamic mechanical analysis (DMA), and tensile test. Based on our findings, SC formed easily when PDLA content was increased, and acts as nucleation sites. Both SC and homo crystals (HC) were observed in the PLLA/PDLA blends. As the content of PDLA increased, the degree of crystallization increased, and the mechanical strength also increased.
Collapse
|
11
|
Purnama P, Samsuri M, Iswaldi I. Properties Enhancement of High Molecular Weight Polylactide Using Stereocomplex Polylactide as a Nucleating Agent. Polymers (Basel) 2021; 13:1725. [PMID: 34070263 PMCID: PMC8197296 DOI: 10.3390/polym13111725] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 12/21/2022] Open
Abstract
As one of the most attractive biopolymers nowadays in terms of their sustainability, degradability, and material tune-ability, the improvement of polylactide (PLA) homopolymer properties by studying the utilization of stereocomplex polylactide (s-PLA) effectively and efficiently is needed. In this sense, we have studied the utilization of s-PLA compared to poly D-lactide (PDLA) homopolymers as a nucleating agent for PLA homopolymers. The mechanical and thermal properties and crystallization behavior of PLA homopolymers in the presence of nucleating agents have been evaluated using a universal testing machine, differential scanning calorimeter, and X-ray diffractometer instruments, respectively. PDLA and s-PLA materials can be used to increase the thermal and mechanical properties of poly L-lactide (PLLA) homopolymers. The s-PLA materials increased the mechanical properties by increasing crystallinity of the PLLA homopolymers. PLLA/s-PLA enhanced mechanical properties to a certain level (5% s-PLA content), then decreased them due to higher s-PLA materials affecting the brittleness of the blends. PDLA homopolymers increased mechanical properties by forming stereocomplex PLA with PLLA homopolymers. Non-isothermal and isothermal evaluation showed that s-PLA materials were more effective at enhancing PLLA homopolymer properties through nucleating agent mechanism.
Collapse
Affiliation(s)
- Purba Purnama
- School of Applied STEM, Universitas Prasetiya Mulya, Tangerang, Banten 15339, Indonesia;
| | - Muhammad Samsuri
- Chemical Engineering Department, Universitas Bhayangkara Jakarta Raya, Bekasi 17121, Indonesia;
| | - Ihsan Iswaldi
- School of Applied STEM, Universitas Prasetiya Mulya, Tangerang, Banten 15339, Indonesia;
| |
Collapse
|
12
|
Praveena NM, Nagarajan S, Gowd EB. Stereocomplexation of enantiomeric star-shaped poly(lactide)s with a chromophore core. CrystEngComm 2021. [DOI: 10.1039/d1ce00037c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Herein, we aim to investigate the influence of the cooling rate from the melt on stereocomplex formation of equimolar blends of enantiomeric star-shaped poly(lactide)s with a dipyridamole core.
Collapse
Affiliation(s)
- N. M. Praveena
- Materials Science and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum 695 019
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Selvaraj Nagarajan
- Materials Science and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum 695 019
- India
- Department of Chemical Engineering
| | - E. Bhoje Gowd
- Materials Science and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum 695 019
- India
- Academy of Scientific and Innovative Research (AcSIR)
| |
Collapse
|
13
|
Liu J, Qi X, Feng Q, Lan Q. Suppression of Phase Separation for Exclusive Stereocomplex Crystallization of a High-Molecular-Weight Racemic Poly(l-lactide)/Poly(d-lactide) Blend from the Glassy State. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00112] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jingqun Liu
- School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China
| | - Xinliang Qi
- School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China
| | - Qianjin Feng
- School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China
| | - Qiaofeng Lan
- Biomaterials Research Center, School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China
| |
Collapse
|
14
|
Homocrystallization and Stereocomplex Crystallization Behaviors of As-Spun and Hot-Drawn Poly(l-lactide)/Poly(d-lactide) Blended Fibers During Heating. Polymers (Basel) 2019; 11:polym11091502. [PMID: 31540132 PMCID: PMC6780053 DOI: 10.3390/polym11091502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/09/2019] [Accepted: 09/11/2019] [Indexed: 11/20/2022] Open
Abstract
A series of poly(l-lactide)/poly(d-lactide) blended chips (LDC), as-spun LD fibers (LDA) and hot-drawn LD fibers (LDH) were prepared for investigating the homocrystallization and stereocomplex crystallization behaviors of LDA and LDH fibers during heating. Modulated differential scanning calorimetry (MDSC), hot stage polarized microscopy (HSPM), and real-time wide-angle X-ray diffraction (WAXD) were used for studying the crystallization and melting behaviors, fiber morphology, and crystalline structure evolution of the LDA and LDH fibers’ homocrystals and stereocomplex crystals during heating. The molecular chain orientations of the LDA and LDH fibers were obtained through spinning and improved through the hot drawing processes. When the molecular chain was oriented on the fiber axis, the homocrystals and stereocomplex crystals of the fibers began to form in turn as the heating temperature exceeded the glass transition temperature of the fiber. The side-by-side packing of the molecular chains was promoted by mixing the molecular chains with the extrusion screw during the spinning process, facilitating stereocomplex crystallization. When the LDA fiber was heated above the glass transition temperature of the fiber, movement of the fiber molecular chain—including molecular chain orientation and relaxation, as well as crystallization, melting, and recrystallization of homocrystals and stereocomplex crystals—were investigated through HSPM. MDSC and real-time WAXD were used to observe the molecular chains of the melted poly(l-lactide) and poly(d-lactide) homocrystals of the fibers rearranging and transiting to form stereocomplex crystals during heating.
Collapse
|
15
|
Chen Y, Hua WQ, Zhang ZC, Xu JZ, Bian FG, Zhong GJ, Xu L, Li ZM. An efficient, food contact accelerator for stereocomplexation of high-molecular-weight poly( -lactide)/ poly( -lactide) blend under nonisothermal crystallization. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.03.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Yang B, Wang R, Ma HL, Li X, Brünig H, Dong Z, Qi Y, Zhang X. Structure Mediation and Properties of Poly( l-lactide)/Poly( d-lactide) Blend Fibers. Polymers (Basel) 2018; 10:E1353. [PMID: 30961279 PMCID: PMC6401892 DOI: 10.3390/polym10121353] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 11/30/2018] [Accepted: 12/01/2018] [Indexed: 12/02/2022] Open
Abstract
Poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) blend as-spun fibers (50/50, wt.%) were prepared by melt spinning. Structure mediation under temperature and stress and properties of poly(l-lactic acid)/poly(d-lactic acid)(PLLA/PDLA) as-spun fibers were investigated by wide-angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC). The results show that highly oriented stereocomplex (SC) crystals can be formed in PLLA/PDLA blend fibers drawn at 60 °C and annealed at 200 °C. However, at drawn temperature of 80 °C, only lower oriented SC crystals can be formed. For PLLA/PDLA blend fibers drawn twice at 60 °C (PLLA/PDLA-60-2), the crystallinity of SC crystals increases with annealing temperature in the range of 200 to 215 °C, while the degree of orientation decreases slightly. When the annealing temperature is 210 °C, the crystallinity and orientation of SC crystals in PLLA/PDLA-60-2 fibers reach 51% and -0.39, respectively. Moreover, PLLA/PDLA-60-2-210 fibers exhibit excellent heat-resistant property even at 200 °C. The results indicate that the oriented PLLA/PDLA blend fibers with high SC crystals content can be regulated in a short time.
Collapse
Affiliation(s)
- Bo Yang
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Rui Wang
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Hui-Ling Ma
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Xiaolu Li
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Harald Brünig
- Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany.
| | - Zhenfeng Dong
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Yue Qi
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Xiuqin Zhang
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| |
Collapse
|
17
|
Kan Z, Luo W, Shi T, Wei C, Han B, Zheng D, Liu S. Facile Preparation of Stereoblock PLA From Ring-Opening Polymerization of rac-Lactide by a Synergetic Binary Catalytic System Containing Ureas and Alkoxides. Front Chem 2018; 6:547. [PMID: 30483495 PMCID: PMC6240762 DOI: 10.3389/fchem.2018.00547] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 10/19/2018] [Indexed: 11/13/2022] Open
Abstract
Ring-opening polymerization (ROP) of cyclic esters/lactones by efficient catalysts is a powerful method for synthesis of biodegradable and biocompatible polyesters with well-defined structures. To develop catalytic systems that are fast, selective and controlled is a persistent effort of chemists. In this contribution, we report a binary urea/alkoxide catalytic system that could catalyze ROP of rac-LA in a fast (over 90% conversion within 1-2 min), stereoselective (P i up to 0.93) and controlled manner, indicated by narrow MW distributions, linear relationship between the monomer conversions and M ns, end-group fidelity, and chain extension experiments. Remarkably, the catalytic system described here is simple, easily prepared, and structurally tunable and thus has versatile catalytic performances.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Shaofeng Liu
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, China
| |
Collapse
|
18
|
Tsuji H, Arakawa Y, Matsumura N. Screening of crystalline species and enhanced nucleation of enantiomeric poly(lactide) systems by melt-quenching. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2436-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
19
|
Agbolaghi S, Abbaspoor S, Abbasi F. A comprehensive review on polymer single crystals—From fundamental concepts to applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.11.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
20
|
Yang S, Xu JZ, Li Y, Lei J, Zhong GJ, Wang R, Li ZM. Effects of Solvents on Stereocomplex Crystallization of High-Molecular-Weight Polylactic Acid Racemic Blends in the Presence of Carbon Nanotubes. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Su Yang
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Yang Li
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Jun Lei
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Gan-Ji Zhong
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Ruyin Wang
- Corbion Purac China; Unit 08-09, 30F, No. 6088 Humin Road Minhang District Shanghai 201100 P. R. China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| |
Collapse
|
21
|
Tashiro K, Kouno N, Wang H, Tsuji H. Crystal Structure of Poly(lactic acid) Stereocomplex: Random Packing Model of PDLA and PLLA Chains As Studied by X-ray Diffraction Analysis. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01468] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kohji Tashiro
- Graduate
School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan
| | - Naoto Kouno
- Graduate
School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan
| | - Hai Wang
- Graduate
School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan
| | - Hideto Tsuji
- Toyohashi University
of Technology, Toyohashi 441-8580, Japan
| |
Collapse
|
22
|
Tashiro K, Wang H, Kouno N, Koshobu J, Watanabe K. Confirmation of the X-ray-Analyzed Heterogeneous Distribution of the PDLA and PLLA Chain Stems in the Crystal Lattice of Poly(lactic acid) Stereocomplex on the Basis of the Vibrational Circular Dichroism IR Spectral Measurement. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01573] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Kohji Tashiro
- Graduate
School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan
| | - Hai Wang
- Graduate
School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan
| | - Naoto Kouno
- Graduate
School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan
| | - Jun Koshobu
- Japan Spectroscopic
Co. Ltd., Ishikawa, Hachioji 192-0032, Japan
| | - Keisuke Watanabe
- Japan Spectroscopic
Co. Ltd., Ishikawa, Hachioji 192-0032, Japan
| |
Collapse
|
23
|
Lotz B, Li G, Chen X, Puiggali J. Crystal polymorphism of polylactides and poly(Pro- alt -CO): The metastable beta and gamma phases. Formation of homochiral PLLA phases in the PLLA/PDLA blends. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
24
|
Microstructure and melting behavior of a solution-cast polylactide stereocomplex: Effect of annealing. J Appl Polym Sci 2017. [DOI: 10.1002/app.44626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
25
|
Kerr C, DeRosa CA, Daly ML, Zhang H, Palmer GM, Fraser CL. Luminescent Difluoroboron β-Diketonate PLA-PEG Nanoparticle. Biomacromolecules 2017; 18:551-561. [PMID: 28150934 DOI: 10.1021/acs.biomac.6b01708] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Luminescent difluoroboron β-diketonate poly(lactic acid) (BF2bdkPLA) materials serve as biological imaging agents. In this study, dye structures were modified to achieve emission colors that span the visible region with potential for multiplexing applications. Four dyes with varying π-conjugation (phenyl, naphthyl) and donor groups (-OMe, -NMe2) were coupled to PLLA-PEG block copolymers (∼11 kDa) by a postpolymerization Mitsunobu reaction. The resulting dye-polymer conjugates were fabricated as nanoparticles (∼55 nm diameter) to produce nanomaterials with a range of emission colors (420-640 nm). For increased stability, dye-PLLA-PEG conjugates were also blended with dye-free PDLA-PEG to form stereocomplex nanoparticles of smaller size (∼45 nm diameter). The decreased dye loading in the stereoblocks blue-shifted the emission, generating a broader range of fluorescence colors (410-620 nm). Tumor accumulation was confirmed in a murine model through biodistribution studies with a red emitting dimethyl amino-substituted dye-polymer analogue. The synthesis, optical properties, oxygen-sensing capabilities, and stability of these block copolymer nanoparticles are presented.
Collapse
Affiliation(s)
- Caroline Kerr
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Christopher A DeRosa
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Margaret L Daly
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Hengtao Zhang
- Department of Radiation Oncology, Duke University , Durham, North Carolina 27710, United States
| | - Gregory M Palmer
- Department of Radiation Oncology, Duke University , Durham, North Carolina 27710, United States
| | - Cassandra L Fraser
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| |
Collapse
|
26
|
Crystal Polymorphism and Morphology of Polylactides. SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2016_15] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
27
|
Abstract
Upon blending enantiomeric poly(l-lactide) [i.e., poly(l-lactic acid) (PLLA)] and poly(d-lactide) (PDLA) [i.e., poly(d-lactic acid) (PDLA)] or synthesis of stereo block poly(lactide) [i.e., poly(lactic acid) (PLA)], a stereocomplex (SC) is formed. PLA SC has a higher melting temperature (or heat resistance), mechanical performance, and hydrolysis-resistance compared to those of neat PLLA and PDLA. Because of such effects, PLA SC has been extensively studied in terms of biomedical and pharmaceutical applications as well as commodity, industrial, and environmental applications. Stereocomplexation stabilizes and strengthens PLA-based hydrogel or nanoparticles for biomedical applications. Stereocomplexation increases the barrier property of PLA-based materials and thereby prolongs drug release from PLA based materials. In addition, PLA SC is attracting significant attention because it can act as a nucleating agent for the widely used biobased polymer PLLA and thereby the heat resistance of PLLA-based materials can be enhanced. Interestingly, a wide variety of SCs other than PLA SC are found to have been formed in the enantiomeric substituted PLA blends and stereo block substituted PLA polymers. In the present review article, a decade of progress in investigation of PLA SCs is summarized.
Collapse
Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan.
| |
Collapse
|
28
|
Zhang ZC, Gao XR, Hu ZJ, Yan Z, Xu JZ, Xu L, Zhong GJ, Li ZM. Inducing Stereocomplex Crystals by Template Effect of Residual Stereocomplex Crystals during Thermal Annealing of Injection-Molded Polylactide. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02169] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zheng-Chi Zhang
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xin-Rui Gao
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhong-Jie Hu
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zheng Yan
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jia-Zhuang Xu
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Ling Xu
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Gan-Ji Zhong
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhong-Ming Li
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| |
Collapse
|
29
|
Tsuji H, Hayakawa T. Heterostereocomplex- and Homocrystallization and Thermal Properties and Degradation of Substituted Poly(lactic acid)s, Poly(l-2-hydroxybutanoic acid) and Poly(d-2-hydroxy-3-methylbutanoic acid). MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600359] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences; Graduate School of Engineering; Toyohashi University of Technology; Tempaku-cho Toyohashi, Aichi 441-8580 Japan
| | - Tomohiro Hayakawa
- Department of Environmental and Life Sciences; Graduate School of Engineering; Toyohashi University of Technology; Tempaku-cho Toyohashi, Aichi 441-8580 Japan
| |
Collapse
|
30
|
Yin Y, Liu G, Song Y, Zhang X, de Vos S, Wang R, Joziasse CA, Wang D. Formation of stereocomplex in enantiomeric poly(lactide)s via recrystallization of homocrystals: An in-situ X-ray scattering study. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.05.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
31
|
Tsuji H, Matsumura N, Arakawa Y. Stereocomplex crystallization and homo-crystallization of star-shaped four-armed stereo diblock poly(lactide)s during precipitation and non-isothermal crystallization. Polym J 2016. [DOI: 10.1038/pj.2016.73] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
32
|
Shibita A, Kawasaki S, Shimasaki T, Teramoto N, Shibata M. Stereocomplexation in Copolymer Networks Incorporating Enantiomeric Glycerol-Based 3-Armed Lactide Oligomers and a 2-Armed ɛ-Caprolactone Oligomer. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E591. [PMID: 28773712 PMCID: PMC5456934 DOI: 10.3390/ma9070591] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/06/2016] [Accepted: 07/12/2016] [Indexed: 12/05/2022]
Abstract
The reactions of enantiomeric glycerol-based 3-armed lactide oligomers (H3DLAO and H3LLAO) and a diethylene glycol-based 2-armed ɛ-caprolactone oligomer (H2CLO) with hexamethylene diisocyanate (HDI) produced polyesterurethane copolymer networks (PEU-3scLAO/2CLOs 100/0, 75/25, 50/50, 25/75 and 0/100) with different feed ratios of stereocomplex (sc) lactide oligomer (H3scLAO = H3DLAO + H3LLAO, H3DLAO/H3LLAO = 1/1) and H2CLO. Thermal and mechanical properties of the copolymer networks were compared with those of a simple homochiral (hc) network (PEU-3DLAO) produced by the reaction of H3DLAO and HDI. X-ray diffraction and differential scanning calorimetric analyses revealed that sc crystallites are formed without any hc crystallization for PEU-3scLAO/2CLOs, and that PEU-3DLAO is amorphous. The melting temperatures of sc crystallites for PEU-3scLAO/2CLOs were much higher than that of hc crystallites of H3DLAO. The polarized optical microscopic analysis revealed that the nucleation efficiency is enhanced with increasing feed of H3scLAO fraction, whereas the spherulite growth rate is accelerated with increasing feed H2CLO fraction over 100/0-50/50 networks. PEU-3scLAO/2CLO 100/0 (i.e., PEU-3scLAO) exhibited a higher tensile strength and modulus than PEU-3DLAO. The elongation at break and tensile toughness for PEU-3scLAO/2CLOs increased with an increasing feed amount of H2CLO.
Collapse
Affiliation(s)
- Ayaka Shibita
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, 2-17-1, Tsudanuma, Narashino, Chiba 275-0016, Japan.
| | - Seina Kawasaki
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, 2-17-1, Tsudanuma, Narashino, Chiba 275-0016, Japan.
| | - Toshiaki Shimasaki
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, 2-17-1, Tsudanuma, Narashino, Chiba 275-0016, Japan.
| | - Naozumi Teramoto
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, 2-17-1, Tsudanuma, Narashino, Chiba 275-0016, Japan.
| | - Mitsuhiro Shibata
- Department of Life and Environmental Sciences, Faculty of Engineering, Chiba Institute of Technology, 2-17-1, Tsudanuma, Narashino, Chiba 275-0016, Japan.
| |
Collapse
|
33
|
Jing Z, Shi X, Zhang G, Li J, Li J, Zhou L, Zhang H. Formation, structure and promoting crystallization capacity of stereocomplex crystallite network in the poly(lactide) blends based on linear PLLA and PDLA with different structures. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.04.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
34
|
Tsuji H, Matsumura N. Stereocomplex Crystallization of Star-Shaped 4-Armed Equimolar Stereo Diblock Poly(lactide)s with Different Molecular Weights: Isothermal Crystallization from the Melt. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences; Graduate School of Engineering; Toyohashi University of Technology; Tempaku-cho, Toyohashi Aichi 441-8580 Japan
| | - Nobutsugu Matsumura
- Department of Environmental and Life Sciences; Graduate School of Engineering; Toyohashi University of Technology; Tempaku-cho, Toyohashi Aichi 441-8580 Japan
| |
Collapse
|
35
|
Li X, Liu Y, Wan L, Li Z, Suh H, Ren J, Ocola LE, Hu W, Ji S, Nealey PF. Effect of Stereochemistry on Directed Self-Assembly of Poly(styrene- b-lactide) Films on Chemical Patterns. ACS Macro Lett 2016; 5:396-401. [PMID: 35614711 DOI: 10.1021/acsmacrolett.6b00011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We demonstrated here for the first time that the stereochemistry of polylactide (PLA) blocks affected the assembly behaviors of PS-b-PLA on chemical patterns. Two PS-b-PLA block copolymers, where the PLA block is either racemic (PDLLA) or left-handed (PLLA), were synthesized and directed to assemble on chemical patterns with a wide range of Ls/L0. PS-b-PDLLA was stretched up to 70% on chemical patterns, while PS-b-PLLA was only stretched by 20%. The assembly behavior of PS-b-PDLLA was different from AB diblock copolymer, but similar to that of ABA triblock copolymer. The high stretchability might be attributed to the formation of stereocomplexes in PDLLA blocks. Compared to ABA triblock copolymers, stereocomplexed diblock copolymers have much faster assembly kinetics. This observation provides a new concept to achieve large process windows by the introduction of specific interactions, for example, H-bonding, supramolecular interaction, and sterecomplexation, between polymer chains.
Collapse
Affiliation(s)
- Xiao Li
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Yadong Liu
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China
| | - Lei Wan
- HGST−a
Western Digital Company, 3403 Yerba
Buena Road, San Jose, California 95135, United States
| | - Zhaolei Li
- School
of Chemistry and Chemical Engineering, Nanjing University, 210093 Nanjing, China
| | - Hyoseon Suh
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Jiaxing Ren
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Leonidas E. Ocola
- Center for
Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wenbing Hu
- School
of Chemistry and Chemical Engineering, Nanjing University, 210093 Nanjing, China
| | - Shengxiang Ji
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China
| | - Paul F. Nealey
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| |
Collapse
|
36
|
Lamellae Evolution of Stereocomplex-Type Poly(Lactic Acid)/Organically-Modified Layered Zinc Phenylphosphonate Nanocomposites Induced by Isothermal Crystallization. MATERIALS 2016; 9:ma9030159. [PMID: 28773284 PMCID: PMC5456693 DOI: 10.3390/ma9030159] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 02/19/2016] [Accepted: 02/29/2016] [Indexed: 11/16/2022]
Abstract
Stereocomplex-type poly(lactic acid) (SC-PLA)/oleylamine-modified layered zinc phenylphosphonate (SC-PLA/m-PPZn) nanocomposites are successfully fabricated using a solution mixing process. Wide-angle X-ray diffraction (WAXD) analysis reveals that the structural arrangement of the oleylamine-modified PPZn exhibits a large interlayer spacing of 30.3 Å. In addition, we investigate the temperature effect on the real-time structural arrangement of PPZn and m-PPZn. The results indicated that the lattice expansion of m-PPZn with increasing temperature leads to an increase in the interlayer spacing from 30.3 to 37.1 Å as the temperature increases from 30 to 150 °C. The interlayer spacing decreases slightly as the temperature further increases to 210 °C. This behavior might be attributed to interlayer oleylamine elimination, which results in hydrogen bonding destruction between the hydroxide sheets and water molecules. As the temperature reaches 240 °C, the in situ WAXD patterns show the coexistence of m-PPZn and PPZn. However, the layered structures of m-PPZn at 300 °C are almost the same as those of PPZn, after the complete degradation temperature of oleylamine. The morphology of the SC-PLA/m-PPZn nanocomposites characterized using WAXD and transmission electron microscopy (TEM) demonstrates that most partial delamination layered materials are randomly dispersed in the SC-PLA matrix. Small-angle X-ray scattering reveals that higher crystal layer thickness and lower surface free energy is achieved in 0.25 wt% SC-PLA/m-PPZn nanocomposites. These results indicate that the introduction of 0.25 wt% m-PPZn into SC-PLA reduces the surface free energy, thereby increasing the polymer chain mobility.
Collapse
|
37
|
Tsuji H, Matsumura N, Arakawa Y. Stereocomplex Crystallization and Homocrystallization of Star-Shaped Four-Armed Stereo Diblock Poly(lactide)s with Different l-Lactyl Unit Contents: Isothermal Crystallization from the Melt. J Phys Chem B 2016; 120:1183-93. [DOI: 10.1021/acs.jpcb.5b11813] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hideto Tsuji
- Department of Environmental
and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Nobutsugu Matsumura
- Department of Environmental
and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Yuki Arakawa
- Department of Environmental
and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| |
Collapse
|
38
|
Bai D, Liu H, Bai H, Zhang Q, Fu Q. Powder metallurgy inspired low-temperature fabrication of high-performance stereocomplexed polylactide products with good optical transparency. Sci Rep 2016; 6:20260. [PMID: 26837848 PMCID: PMC4738299 DOI: 10.1038/srep20260] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 12/31/2015] [Indexed: 11/09/2022] Open
Abstract
Stereocomplexation between enantiomeric poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) provides an avenue to greatly enhance performance of eco-friendly polylactide (PLA). Unfortunately, although the manufacturing of semicrystalline polymers generally involves melt processing, it is still hugely challenging to create high-performance stereocomplexed polylactide (sc-PLA) products from melt-processed high-molecular-weight PLLA/PDLA blends due to the weak crystallization memory effect of stereocomplex (sc) crystallites after complete melting as well as the substantial degradation of PLA chains at elevated melt-processing temperatures of ca. 240-260 °C. Inspired by the concept of powder metallurgy, here we report a new facile route to address these obstacles by sintering of sc-PLA powder at temperatures as low as 180-210 °C, which is distinctly different from traditional sintering of polymer powders performed at temperatures far exceeding their melting temperatures. The enantiomeric PLA chain segments from adjacent powder particles can interdiffuse across particle interfaces and co-crystallize into new sc crystallites capable of tightly welding the interfaces during the low-temperature sintering process, and thus highly transparent sc-PLA products with outstanding heat resistance, mechanical strength, and hydrolytic stability have been successfully fabricated for the first time.
Collapse
Affiliation(s)
- Dongyu Bai
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Huili Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Hongwei Bai
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Qin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| |
Collapse
|
39
|
Tsuji H. WITHDRAWN: PLA Stereocomplexes: A Decade of Progress. Adv Drug Deliv Rev 2016:S0169-409X(16)30009-6. [PMID: 26785171 DOI: 10.1016/j.addr.2015.12.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 12/31/2015] [Indexed: 12/16/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
Collapse
Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan.
| |
Collapse
|
40
|
Jiang L, Shen T, Xu P, Zhao X, Li X, Dong W, Ma P, Chen M. Crystallization modification of poly(lactide) by using nucleating agents and stereocomplexation. E-POLYMERS 2016. [DOI: 10.1515/epoly-2015-0179] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPoly(lactide), PLA, as one of the most promising biopolymers, has been receiving increasing attention in recent years because of its excellent performances in renewability, mechanical properties, biocompatibility and biodegradability. However, its application is limited by its brittleness and low heat distortion temperatures (HDT). The low HDT mainly results from a low crystallization rate and lack of crystallinity after fast processing, e.g. injection molding. Consequently, considerable attention was paid, in recent years, to achieve fast(er) crystallization of PLA. In here, we briefly review the research progress in the crystallization modification of PLA notably by means of adding nucleating agents and stereocomplexation.
Collapse
Affiliation(s)
- Long Jiang
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Tianfeng Shen
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Pengwu Xu
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiyuan Zhao
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaojie Li
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Weifu Dong
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Piming Ma
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Mingqing Chen
- 1The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
41
|
Bao J, Chang X, Shan G, Bao Y, Pan P. Synthesis of end-functionalized hydrogen-bonding poly(lactic acid)s and preferential stereocomplex crystallization of their enantiomeric blends. Polym Chem 2016. [DOI: 10.1039/c6py00976j] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel UPy-functionalized alcohol was synthesized and used to initiate the solvent-free ROP of lactide to attain UPy-functionalized PLLA and PDLA. The crystallization rate and stereocomplexation ability of UPy-functionalized PLLA/PDLA blends were promoted.
Collapse
Affiliation(s)
- Jianna Bao
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Xiaohua Chang
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Guorong Shan
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yongzhong Bao
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| |
Collapse
|
42
|
Uehara H, Ishizuka M, Tanaka H, Kano M, Yamanobe T. Stereocomplex poly(lactic acid) nanoparticles crystallized through nanoporous membranes and application as nucleating agent. RSC Adv 2016. [DOI: 10.1039/c5ra25688g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Stereocomplex crystallization of poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) was performed by flowing their blended solution through nano-channels of porous membranes.
Collapse
Affiliation(s)
- Hiroki Uehara
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Mina Ishizuka
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Hidekazu Tanaka
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Makiko Kano
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Takeshi Yamanobe
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| |
Collapse
|
43
|
Bao J, Han L, Shan G, Bao Y, Pan P. Preferential Stereocomplex Crystallization in Enantiomeric Blends of Cellulose Acetate-g-Poly(lactic acid)s with Comblike Topology. J Phys Chem B 2015; 119:12689-98. [DOI: 10.1021/acs.jpcb.5b05398] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jianna Bao
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Lili Han
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Guorong Shan
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Yongzhong Bao
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Pengju Pan
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| |
Collapse
|
44
|
Kitano H, Tokuwa KI, Ueno H, Li L, Saruwatari Y. Zwitterionic polymer-grafted microspheres prepared by RAFT polymerization. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3695-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
45
|
Tsuji H, Tawara T. Quaternary stereocomplex formation of substituted poly(lactic acid)s, l- and d-configured poly(2-hydroxybutanoic acid)s and l- and d-configured poly(2-hydroxy-3-methylbutanoic acid)s. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.05.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
46
|
Pan P, Han L, Bao J, Xie Q, Shan G, Bao Y. Competitive Stereocomplexation, Homocrystallization, and Polymorphic Crystalline Transition in Poly(l-lactic acid)/Poly(d-lactic acid) Racemic Blends: Molecular Weight Effects. J Phys Chem B 2015; 119:6462-70. [DOI: 10.1021/acs.jpcb.5b03546] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pengju Pan
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Lili Han
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Jianna Bao
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Qing Xie
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Guorong Shan
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| | - Yongzhong Bao
- State Key Laboratory of Chemical
Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China
| |
Collapse
|
47
|
Han L, Pan P, Shan G, Bao Y. Stereocomplex crystallization of high-molecular-weight poly(l-lactic acid)/poly(d-lactic acid) racemic blends promoted by a selective nucleator. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.02.053] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
48
|
Tsuji H, Sobue T. Stereocomplexation of quaternary or ternary monomer units and dual stereocomplexation in enantiomeric binary and quaternary polymer blends of poly(2-hydroxybutanoic acid)s, poly(2-hydroxybutanoic acid-co-lactic acid)s, and poly(lactic acid)s. RSC Adv 2015. [DOI: 10.1039/c5ra17096f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Quaternary or ternary monomer units of 2-hydroxybutanoic and lactic acid-based enantiomeric random copolymer and copolymer or homopolymer form stereocomplex crystallites.
Collapse
Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Tadashi Sobue
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| |
Collapse
|
49
|
López-Rodríguez N, Martínez de Arenaza I, Meaurio E, Sarasua JR. Efficient stereocomplex crystallization in enantiomeric blends of high molecular weight polylactides. RSC Adv 2015. [DOI: 10.1039/c4ra16994h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Stereocomplex crystallization at high temperatures in PLLA/PDLA blends can be improved selecting conditions that reduce the loss of optical purity arising from transesterification reactions.
Collapse
Affiliation(s)
- N. López-Rodríguez
- University of The Basque Country (UPV/EHU)
- Department of Mining-Metallurgy Engineering and Materials Science & POLYMAT
- School of Engineering
- 48013 Bilbao
- Spain
| | - I. Martínez de Arenaza
- University of The Basque Country (UPV/EHU)
- Department of Mining-Metallurgy Engineering and Materials Science & POLYMAT
- School of Engineering
- 48013 Bilbao
- Spain
| | - E. Meaurio
- University of The Basque Country (UPV/EHU)
- Department of Mining-Metallurgy Engineering and Materials Science & POLYMAT
- School of Engineering
- 48013 Bilbao
- Spain
| | - J. R. Sarasua
- University of The Basque Country (UPV/EHU)
- Department of Mining-Metallurgy Engineering and Materials Science & POLYMAT
- School of Engineering
- 48013 Bilbao
- Spain
| |
Collapse
|
50
|
Sugai N, Asai S, Tezuka Y, Yamamoto T. Photoinduced topological transformation of cyclized polylactides for switching the properties of homocrystals and stereocomplexes. Polym Chem 2015. [DOI: 10.1039/c5py00158g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new methodology for a stimuli-responsive polymer was proposed on the basis of cyclization and photocleavage. This requires only a single reaction per polymer molecule.
Collapse
Affiliation(s)
- Naoto Sugai
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Shigeo Asai
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Yasuyuki Tezuka
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Takuya Yamamoto
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| |
Collapse
|