1
|
Yang S, Li Y, Nie M, Liu X, Wang Q, Chen N, Zhang C. Lifecycle Management for Sustainable Plastics: Recent Progress from Synthesis, Processing to Upcycling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2404115. [PMID: 38869422 DOI: 10.1002/adma.202404115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/06/2024] [Indexed: 06/14/2024]
Abstract
Plastics, renowned for their outstanding properties and extensive applications, assume an indispensable and irreplaceable role in modern society. However, the ubiquitous consumption of plastic items has led to a growing accumulation of plastic waste. Unreasonable practices in the production, utilization, and recycling of plastics have led to substantial energy resource depletion and environmental pollution. Herein, the state-of-the-art advancements in the lifecycle management of plastics are timely reviewed. Unlike typical reviews focused on plastic recycling, this work presents an in-depth analysis of the entire lifecycle of plastics, covering the whole process from synthesis, processing, to ultimate disposal. The primary emphasis lies on selecting judicious strategies and methodologies at each lifecycle stage to mitigate the adverse environmental impact of waste plastics. Specifically, the article delineates the rationale, methods, and advancements realized in various lifecycle stages through both physical and chemical recycling pathways. The focal point is the attainment of optimal recycling rates for waste plastics, thereby alleviating the ecological burden of plastic pollution. By scrutinizing the entire lifecycle of plastics, the article aims to furnish comprehensive solutions for reducing plastic pollution and fostering sustainability across all facets of plastic production, utilization, and disposal.
Collapse
Affiliation(s)
- Shuangqiao Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
- The Research Department of Resource Carbon Neutrality, Tianfu Yongxing Laboratory, Chengdu, 610213, China
| | - Yijun Li
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
- The Research Department of Resource Carbon Neutrality, Tianfu Yongxing Laboratory, Chengdu, 610213, China
| | - Min Nie
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
| | - Xingang Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
| | - Qi Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
- The Research Department of Resource Carbon Neutrality, Tianfu Yongxing Laboratory, Chengdu, 610213, China
| | - Ning Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
- The Research Department of Resource Carbon Neutrality, Tianfu Yongxing Laboratory, Chengdu, 610213, China
| | - Chuhong Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610041, China
- The Research Department of Resource Carbon Neutrality, Tianfu Yongxing Laboratory, Chengdu, 610213, China
| |
Collapse
|
2
|
Zhang J, Zhou X, Hu Q, Zhou K, Zhang Y, Dong S, Zhao G, Zhang S. Concentration-induced spontaneous polymerization of protic ionic liquids for efficient in situ adhesion. Nat Commun 2024; 15:4265. [PMID: 38769305 PMCID: PMC11106314 DOI: 10.1038/s41467-024-48561-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 05/03/2024] [Indexed: 05/22/2024] Open
Abstract
The advancement of contemporary adhesives is often limited by the balancing act between cohesion and interfacial adhesion strength. This study explores an approach to overcome this trade-off by utilizing the spontaneous polymerization of a protic ionic liquid-based monomer obtained through the neutralization of 2-acrylamide-2-methyl propane sulfonic acid and hydroxylamine. The initiator-free polymerization process is carried out through a gradual increase in monomer concentration in aqueous solutions caused by solvent evaporation upon heating, which results in the in-situ formation of a tough and thin adhesive layer with a highly entangled polymeric network and an intimate interface contact between the adhesive and substrate. The abundance of internal and external non-covalent interactions also contributes to both cohesion and interfacial adhesion. Consequently, the produced protic poly(ionic liquid)s exhibit considerable adhesion strength on a variety of substrates. This method also allows for the creation of advanced adhesive composites with electrical conductivity or visualized sensing functionality by incorporating commercially available fillers into the ionic liquid adhesive. This study provides a strategy for creating high-performance ionic liquid-based adhesives and highlights the importance of in-situ polymerization for constructing adhesive composites.
Collapse
Affiliation(s)
- Jun Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Xuan Zhou
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Qinyu Hu
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Kaijian Zhou
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Yan Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Shengyi Dong
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Gai Zhao
- State Key Laboratory of Mechanics and Control of Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
| | - Shiguo Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China.
| |
Collapse
|
3
|
Wu W, Wu W, Guo M, Wang R, Wang X, Gao Q. Synthesis of MPEG-b-PLLA Diblock Copolymers and Their Crystallization Performance with PDLA and PLLA Composite Films. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2105. [PMID: 38730912 PMCID: PMC11084635 DOI: 10.3390/ma17092105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 04/18/2024] [Accepted: 04/20/2024] [Indexed: 05/13/2024]
Abstract
Methoxy poly(ethylene glycol)-block-poly(L-lactide) (MPEG-b-PLLA) has a wide range of applications in pharmaceuticals and biology, and its structure and morphology have been thoroughly studied. In the experiment, we synthesized MPEG-b-PLLA with different block lengths using the principle of ring-opening polymerization by controlling the amount of lactic acid added. The thermodynamic properties of copolymers and the crystallization properties of blends were studied separately. The crystallization kinetics of PDLA/MPEG-b-PLA and PLLA/MPEG-b-PLA composite films were studied using differential scanning calorimetry (DSC). The results indicate that the crystallization kinetics of composite films are closely related to the amount of block addition. The crystallinity of the sample first increases and then decreases with an increase in MPEG-b-PLLA content. These results were also confirmed in polarized optical microscope (POM) and wide-angle X-ray diffraction (WAXD) tests. When 3% MPEG-b-PLLA was added to the PDLA matrix, the blend exhibited the strongest crystallization performance.
Collapse
Affiliation(s)
- Wenjing Wu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; (W.W.); (W.W.); (R.W.); (X.W.)
| | - Weixin Wu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; (W.W.); (W.W.); (R.W.); (X.W.)
| | - Mingwei Guo
- College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;
| | - Ruizhe Wang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; (W.W.); (W.W.); (R.W.); (X.W.)
| | - Xuanxuan Wang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; (W.W.); (W.W.); (R.W.); (X.W.)
| | - Qinwei Gao
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; (W.W.); (W.W.); (R.W.); (X.W.)
- Jiangsu Key Laboratory for the Chemistry and Utilization of Agricultural and Forest Biomass, Nanjing Forestry University, Nanjing 210037, China
| |
Collapse
|
4
|
Chen Y, Lan Q. Experimental evidence for immiscibility of enantiomeric polymers: Phase separation of high-molecular-weight poly(ʟ-lactide)/poly(ᴅ-lactide) blends and its impact on hindering stereocomplex crystallization. Int J Biol Macromol 2024; 260:129459. [PMID: 38232890 DOI: 10.1016/j.ijbiomac.2024.129459] [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: 09/29/2023] [Revised: 01/01/2024] [Accepted: 01/11/2024] [Indexed: 01/19/2024]
Abstract
Although polymers tend not to mix, it remains challenging to characterize the immiscibility of enantiomeric poly(ʟ-lactide) (PLLA) and poly(ᴅ-lactide) (PDLA), particularly with equivalent and high molecular weight (high MW), which frustratingly disfavors the exclusive stereocomplexation. By introducing a random copolymer (PLC) of ʟ-lactide and caprolactone to form binary blends with PLLA and PDLA, the phase behavior of high-MW PLLA/PDLA blends was investigated mainly by using differential scanning calorimetry (DSC) and atomic force microscopy (AFM). DSC results showed that PLLA/PLC blends exhibited a single glass transition temperature (Tg), which depended on the blending ratio and precisely corresponded with the theoretical values calculated from the Fox equation. In comparison, PDLA/PLC blends showed composition-dependent heat-capacity increment at two unchanged Tg values of pure PLC and PDLA. AFM observation revealed that PLC is completely miscible with PLLA at high MW but is immiscible with PDLA, logically suggesting immiscibility of high-MW PLLA and PDLA. Moreover, AFM results demonstrated that high-MW PLLA/PDLA blends exhibited spherical droplets in asymmetric blends and bicontinuous interpenetrating worm-like patterns in symmetric counterparts, showing distinct and well-defined interfaces, confirming the microphase separation. Additionally, different MWs fundamentally led to significant differences in miscibility, which consequently affected the crystallization behaviors of PLLA/PDLA blends. This work provides evidence for (im)miscibility and its crucial impact on the crystallization of PLLA/PDLA blends and has important implications for understanding the stereocomplexation of polymers.
Collapse
Affiliation(s)
- Yujing Chen
- Biomaterials Research Center, 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
|
5
|
Pan P, Wang J, Wang X, Kang Y, Yu X, Chen T, Hao Y, Liu W. Physically cross-linked chitosan gel with tunable mechanics and biodegradability for tissue engineering scaffold. Int J Biol Macromol 2024; 257:128682. [PMID: 38070807 DOI: 10.1016/j.ijbiomac.2023.128682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/29/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Chitosan, a cationic polysaccharide, exhibits promising potential for tissue engineering applications. However, the poor mechanical properties and rapid biodegradation have been the major limitations for its applications. In this work, an effective strategy was proposed to optimize the mechanical performance and degradation rate of chitosan gel scaffolds by regulating the water content. Physical chitosan hydrogel (HG, with 93.57 % water) was prepared by temperature-controlled cross-linking, followed by dehydration to obtain xerogel (XG, with 2.84 % water) and rehydration to produce wet gel (WG, with 56.06 % water). During this process, changes of water content significantly influenced the water existence state, hydrogen bonding, and the chain entanglements of chitosan in the gel network. The mechanical compression results showed that the chitosan gel scaffolds exhibited tunable compressive strength (0.3128-139 MPa) and compressive modulus (0.2408-1094 MPa). XG could support weights exceeding 65,000 times its own mass while maintaining structural stability. Furthermore, in vitro and in vivo experiments demonstrated that XG and WG exhibited better biocompatibility and resistance to biodegradation compared with HG. Overall, this work contributes to the design and optimization of chitosan scaffolds without additional chemical crosslinkers, which has potential in tissue engineering and further clinical translation.
Collapse
Affiliation(s)
- Peng Pan
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China; School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Jian Wang
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, PR China
| | - Xi Wang
- Department of Emergency and Oral Medicine, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, PR China
| | - Ye Kang
- Department of Pathology, Shengjing Hospital of China Medical University, Shenyang 110004, PR China
| | - Xinding Yu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China; School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Tiantian Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China; School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Yulin Hao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China; School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Wentao Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China; School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China.
| |
Collapse
|
6
|
Wang K, Wang R, Hu K, Ma Z, Zhang C, Sun X. Crystallization-driven formation poly (l-lactic acid)/poly (d-lactic acid)-polyethylene glycol-poly (l-lactic acid) small-sized microsphere structures by solvent-induced self-assembly. Int J Biol Macromol 2024; 254:127924. [PMID: 37944727 DOI: 10.1016/j.ijbiomac.2023.127924] [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: 08/13/2023] [Revised: 10/23/2023] [Accepted: 11/04/2023] [Indexed: 11/12/2023]
Abstract
Improving hydrophobicity through the regulation of surface microstructures has attracted significant interest in various applications. This research successfully prepared a surface with microsphere structures using the Non-solvent induced phase separation method (NIPS). Poly(D-Lactic acid)-block-poly(ethylene glycol)-block-poly(D-Lactic acid) (PDLA-PEG-PDLA) block polymers were synthesized by ring-opening polymerization of D-Lactic acid (D-LA) using polyethylene glycol (PEG) as initiator. PLLA/PDLA-PEG-PDLA membrane with microscale microsphere morphology was fabricated using a nonsolvent-induced self-assembly method by blending the triblock copolymer with a poly(L-lactic acid) (PLLA) solution. In phase separation processes, the amphiphilic block copolymers self-assemble into micellar structures to minimize the Gibbs free energy, and the hydrophilic segments (PEG) aggregate to form the core of the micelles, while the hydrophobic segments (PDLA) are exposed on the outer corona resulting in a core-shell structure. The Stereocomplex Crystalline (SC), formed by the hydrogen bonding between PLLA and PDLA, can facilitate the transition from liquid-liquid phase separation to solid-liquid phase separation, and the PEG chain segments can enhance the formation of SC. The membrane, prepared by adjusting the copolymer content and PEG chain length, exhibited adjustable microsphere quantity, diameter, and surface roughness, enabling excellent hydrophobicity and controlled release of oil-soluble substances.
Collapse
Affiliation(s)
- Kai Wang
- Yantai Research Institute of Harbin Engineering University, Yantai 264006, China; Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China
| | - Rui Wang
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China; Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264006, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Keling Hu
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China
| | - Zhengfeng Ma
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China; Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264006, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Chunhong Zhang
- Yantai Research Institute of Harbin Engineering University, Yantai 264006, China.
| | - Xin Sun
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China.
| |
Collapse
|
7
|
Zhao Z, Zhao H, Liu J, Ren Z. Synthesis and Properties of Bipolar Ladder-Like Polysiloxane with Carbazole and Triphenylphosphine Oxygen Groups. Macromol Rapid Commun 2023; 44:e2300233. [PMID: 37366221 DOI: 10.1002/marc.202300233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/23/2023] [Indexed: 06/28/2023]
Abstract
In this study, a series of ladder-like polysiloxanes are synthesized by introducing double-chain Si-O-Si polymer as the backbone and the carbazole and triphenylphosphine oxide with high triplet energy as side groups. The ladder-like structures of polysiloxanes are achieved through a controlled polymerization method that involves the monomer self-assembly and subsequent surface-restricted solid-phase in situ condensation through freeze-drying. The introduction of siloxane improves thermal stability of the polymers and inhibits the conjugation of the polymers between the side groups, leading to an increase in the triplet energy level. Therefore, all these polymers perform higher triplet energy levels than phosphorescent emitter (FIrpic). The cyclic voltammetry measurements demonstrate that the bipolar polymer exhibits a high highest occupied molecular orbital (HOMO) value of -5.32 eV, which is consistent with the work function of ITO/PEDOT:PSS, consequently facilitating hole injection. Furthermore, the incorporation of triphenylphosphine oxide promotes electron injection. Molecular simulations reveal that the frontier orbital distributions of the bipolar polymer are located on the carbazole and triphenylphosphine groups, respectively, which facilitate the transport of electrons and holes.
Collapse
Affiliation(s)
- Zhennan Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Haisong Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Junteng Liu
- Beijing Key Laboratory of Membrane Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhongjie Ren
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| |
Collapse
|
8
|
Wang Y, Li YX, Cseh L, Chen YX, Yang SG, Zeng X, Liu F, Hu W, Ungar G. Enantiomers Self-Sort into Separate Counter-Twisted Ribbons of the Fddd Liquid Crystal─Antiferrochirality and Parachirality. J Am Chem Soc 2023; 145:17443-17460. [PMID: 37523689 PMCID: PMC10416214 DOI: 10.1021/jacs.3c06164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Indexed: 08/02/2023]
Abstract
The recently discovered orthorhombic liquid crystal (LC) phase of symmetry Fddd is proving to be widespread. In this work, a chiral hydroxybutyrate linkage is inserted into the molecular core of hexacatenar rodlike compounds, containing a thienylfluorenone fluorophore. In addition to more usual tools, the methods used include grazing-incidence X-ray scattering, modulated differential scanning calorimetry (DSC), flash DSC with rates up to 6000 K/s, and chiro-optical spectroscopies using Mueller matrix method, plus conformational mapping. Although pure R and S enantiomers form only a strongly chiral hexagonal columnar LC phase (Colh*), the racemic mixture forms a highly ordered Fddd phase with 4 right- and 4 left-handed twisted ribbon-like columns traversing its large unit cell. In that structure, the two enantiomers locally deracemize and self-sort into the columns of their preferred chirality. The twisted ribbons in Fddd, with a 7.54 nm pitch, consist of stacked rafts, each containing ∼2 side-by-side molecules, the successive rafts rotated by 17°. In contrast, an analogous achiral compound forms only the columnar phase. The multiple methods used gave a comprehensive picture and helped in-depth understanding not only of the Fddd phase but also of the "parachiral" Colh* in pure enantiomers with irregular helicity, whose chirality is compared to the magnetization of a paramagnet in a field. Unusual short-range ordering effects are also described. An explanation of these phenomena is proposed based on conformational analysis. Surprisingly, the isotropic-columnar transition is extremely fast, completing within ∼20 ms. A clear effect of phase on UV-vis absorption and emission is observed.
Collapse
Affiliation(s)
- Yan Wang
- Shaanxi
International Research Centre for Soft Matter, State Key Laboratory
for Mechanical Behaviour of Materials, Xi’an
Jiaotong University, Xi’an 710049, China
| | - Ya-Xin Li
- School
of Chemistry and Chemical Engineering, Henan
University of Technology, Zhengzhou 450001, China
| | - Liliana Cseh
- Romanian
Academy, Coriolan Dragulescu Institute of Chemistry, Timisoara 300223, Romania
| | - Yong-Xuan Chen
- State
Key Laboratory of Coordinate Chemistry, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | - Shu-Gui Yang
- Shaanxi
International Research Centre for Soft Matter, State Key Laboratory
for Mechanical Behaviour of Materials, Xi’an
Jiaotong University, Xi’an 710049, China
| | - Xiangbing Zeng
- Department
of Materials Science and Engineering, University
of Sheffield, Sheffield S1 3JD, U.K.
| | - Feng Liu
- Shaanxi
International Research Centre for Soft Matter, State Key Laboratory
for Mechanical Behaviour of Materials, Xi’an
Jiaotong University, Xi’an 710049, China
| | - Wenbing Hu
- State
Key Laboratory of Coordinate Chemistry, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | - Goran Ungar
- Shaanxi
International Research Centre for Soft Matter, State Key Laboratory
for Mechanical Behaviour of Materials, Xi’an
Jiaotong University, Xi’an 710049, China
- Department
of Materials Science and Engineering, University
of Sheffield, Sheffield S1 3JD, U.K.
| |
Collapse
|
9
|
Liu C, Han Z, Yan X, Yu J, Zhang Q, Wang D, Zhao Y, Zhang H. Rheological and mechanical properties, heat resistance and hydrolytic degradation of poly(butylene succinate‐
co
‐adipate)/stereocomplex polylactide blends. J Appl Polym Sci 2023. [DOI: 10.1002/app.53884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Chengkai Liu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
- College of Chemical and Environmental Engineering Shandong University of Science and Technology Qingdao 266510 China
| | - Zhengyi Han
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials Fudan University Shanghai 200438 China
| | - Xiangyu Yan
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Jinshuo Yu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Qiao Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Dongmei Wang
- College of Chemical and Environmental Engineering Shandong University of Science and Technology Qingdao 266510 China
| | - Yan Zhao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Huiliang Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| |
Collapse
|
10
|
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]
|
11
|
Wang Z, Duan R, Pang X, Wu R, Guo B, Xu J. Critical Size and Formation Mechanism of Secondary Nuclei in Melt-Crystallized Polylactide Stereocomplex Crystals. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Zhiqi Wang
- Advanced Materials Laboratory of Ministry of Education, Department of Chemical Engineering, Tsinghua University, 100084Beijing, China
| | - Ranlong Duan
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun130022, China
| | - Xuan Pang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun130022, China
| | - Rongling Wu
- Departments of Public Health Sciences and Statistics, The Pennsylvania State University, Hershey, Pennsylvania17033, United States
| | - Baohua Guo
- Advanced Materials Laboratory of Ministry of Education, Department of Chemical Engineering, Tsinghua University, 100084Beijing, China
| | - Jun Xu
- Advanced Materials Laboratory of Ministry of Education, Department of Chemical Engineering, Tsinghua University, 100084Beijing, China
| |
Collapse
|
12
|
Cui J, Yang SG, Zhang Q, Liu F, Ungar G. Poisoning by Purity: What Stops Stereocomplex Crystallization in Polylactide Racemate? Macromolecules 2023; 56:989-998. [PMID: 36818575 PMCID: PMC9933539 DOI: 10.1021/acs.macromol.2c02067] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/28/2022] [Indexed: 01/22/2023]
Abstract
Formation of stereocomplex crystals (SC) is an effective way to improve the heat resistance and mechanical performance of poly(lactic acid) products. However, at all but the slowest cooling rates, SC crystallization of a high-molecular-weight poly(l-lactic acid)/poly(d-lactic acid) (PLLA/PDLA) racemate stops at a high temperature or does not even start, leaving the remaining melt to crystallize into homochiral crystals (HC) or an SC-HC mixture on continuous cooling. To understand this intriguing phenomenon, we revisit the SC crystallization of both high- and low-molecular-weight PLLA/PDLA racemates. Based on differential scanning calorimetry (DSC), supplemented by optical microscopy and X-ray scattering, we concluded that what stops the growth of SC is the accumulation of the nearly pure enantiomer, either PDLA or PLLA, that is rejected from the SC ahead of its growth front. The excess enantiomer is a result of random compositional fluctuation present in the melt even if the average composition is 1:1. The situation is more favorable if the initial polymer is not fully molten or is brought up to just above the melting point where SC seeds remain, as proven by DSC and X-ray scattering. Moreover, we find that not only is SC growth poisoned by the locally pure enantiomer but also that at lower temperatures, the HC growth can be poisoned by the blend. This explains why SC growth, arrested at high temperatures, can resume at lower temperatures, along with the growth of HC. Furthermore, while some previous works attributed the incomplete SC crystallization to a problem of primary nucleation, we find that adding a specific SC-promoting nucleating agent does not help alleviate the problem of cessation of SC crystallization. This reinforces the conclusion that the main problem is in growth rather than in nucleation.
Collapse
Affiliation(s)
- Jiaming Cui
- Shaanxi
International Research Center for Soft Matter, State Key Laboratory
for Mechanical Behavior of Materials, Xi’an
Jiaotong University, Xi’an710049, China
| | - Shu-Gui Yang
- Shaanxi
International Research Center for Soft Matter, State Key Laboratory
for Mechanical Behavior of Materials, Xi’an
Jiaotong University, Xi’an710049, China,
| | - Qilu Zhang
- Shaanxi
International Research Center for Soft Matter, State Key Laboratory
for Mechanical Behavior of Materials, Xi’an
Jiaotong University, Xi’an710049, China
| | - Feng Liu
- Shaanxi
International Research Center for Soft Matter, State Key Laboratory
for Mechanical Behavior of Materials, Xi’an
Jiaotong University, Xi’an710049, China
| | - Goran Ungar
- Shaanxi
International Research Center for Soft Matter, State Key Laboratory
for Mechanical Behavior of Materials, Xi’an
Jiaotong University, Xi’an710049, China,Department
of Materials Science and Engineering, Sheffield
University, SheffieldS1 3JD, U.K.,,
| |
Collapse
|
13
|
Guo M, Zhao Z, Xie Z, Wu W, Wu W, Gao Q. Role of the Branched PEG- b-PLLA Block Chain in Stereocomplex Crystallization and Crystallization Kinetics for PDLA/MPEG- b-PLLA- g-glucose Blends with Different Architectures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15866-15879. [PMID: 36469019 DOI: 10.1021/acs.langmuir.2c02867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The isothermal crystallization behavior and corresponding morphology evolution of poly(d-lactic acid) (PDLA) blends with PLLA6.7k or MPEG-b-PLLA6.7k-g-glucose with different architectures and different PLLA-grafted copolymer contents were investigated. The formation of stereocomplexes (SCs) in between the chain branched structure of MPEG-b-PLLA6.7k-g-glucose and PDLA chains acting as the physical crosslinking points slows down the motion of PDLA chains, but the SCs could act as a heterogeneous nucleating agent for the late formation of homocrystals (HCs) in the blend system, accelerating the crystallization kinetics of HCs through enhancing the nucleation density. For PDLA/MPEG-b-PLLA6.7k-g-glucose blends, the mobility of SCs in the blend system and the nucleation density of SCs in the blends exhibit oppositional behavior during the isothermal crystallization at a Tc of 130 °C. The evolution of the crystal growth and structure during the isothermal crystallization process by rheometry has revealed the interesting role of the branched chains of MPEG-b-PLLA6.7k-g-glucose in the mechanism of the crystallization in PDLA blends.
Collapse
Affiliation(s)
- Mingwei Guo
- College of Chemical Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Zhifeng Zhao
- College of Chemical Engineering, Hebei University of Technology, Tianjin300130, China
| | - Zhongyuan Xie
- College of Chemical Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Weixin Wu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Wenjing Wu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing210037, China
| | - Qinwei Gao
- College of Chemical Engineering, Nanjing Forestry University, Nanjing210037, China
- Jiangsu Key Lab for the Chemistry and Utilization of Agricultural and Forest Biomass, Nanjing Forestry University, Nanjing210037, China
| |
Collapse
|
14
|
Guo M, Wu W, Wu W, Gao Q. Competitive Mechanism of Stereocomplexes and Homocrystals in High-Performance Symmetric and Asymmetric Poly(lactic acid) Enantiomers: Qualitative Methods. ACS OMEGA 2022; 7:41412-41425. [PMID: 36406546 PMCID: PMC9670727 DOI: 10.1021/acsomega.2c05198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
To systematically explore the critical contributions of both molecular weights and crystallization temperature and chain length and molar ratios to the formation of stereocomplexes (SCs), our group quantitatively prepared a wide MW range of symmetric and asymmetric poly(lactic acid) (PLA) racemic blends, which contains L-MW PLLA with M n > 6k g/mol. The crystallinity and relative fraction of SCs increase with T c, and the SCs are exclusively formed at T c > 180 °C in M/H-MW racemic blends. When MWs of one of the enantiomers are over 6k and less than 41k, multiple stereocomplexation is clear in the asymmetric racemic blends and more ordered SCs form with less entanglement or the amorphous region compared to those for the MW of the enantiomers over 41k in the symmetric/asymmetric enantiomers. When the MW of the blends is more than 41k, SCs and homocrystals (HCs) coexist in the symmetric enantiomers and the multicomplexation can restrict the asymmetric enantiomers. This study provides a deep comprehensive insight into the stereocomplex crystallization mechanism of polymers and provides a reference value for future research attempting to prepare stereocomplex materials.
Collapse
Affiliation(s)
- Mingwei Guo
- College
of Chemical Engineering, Nanjing Forestry
University, Nanjing210037, China
| | - Wenjing Wu
- College
of Chemical Engineering, Nanjing Forestry
University, Nanjing210037, China
| | - Weixin Wu
- College
of Chemical Engineering, Nanjing Forestry
University, Nanjing210037, China
| | - Qinwei Gao
- College
of Chemical Engineering, Nanjing Forestry
University, Nanjing210037, China
- Co-Innovation
Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing210037, China
| |
Collapse
|
15
|
Yu K, Wu Y, Zhang X, Hou J, Chen J. Microcellular open-cell poly(l-lactic acid)/poly(d-lactic acid) foams for oil-water separation prepared via supercritical CO2 foaming. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
16
|
Enhanced Mechanical Properties and Anti-Inflammation of Poly(L-Lactic Acid) by Stereocomplexes of PLLA/PDLA and Surface-Modified Magnesium Hydroxide Nanoparticles. Polymers (Basel) 2022; 14:polym14183790. [PMID: 36145934 PMCID: PMC9504497 DOI: 10.3390/polym14183790] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/01/2022] [Accepted: 09/07/2022] [Indexed: 12/29/2022] Open
Abstract
Poly(L-lactic acid) (PLLA), as a biodegradable polymer, has attracted attention for use as a biomaterial. In order to apply PLLA as a cardiovascular stent, stronger mechanical properties and anti-inflammatory effects against acidic by-products are required. In this study, PLLA/PDLA stereocomplex microparticles (SC) were developed and surface-modified magnesium hydroxide (MH) nanoparticles with oligolactide were combined with these PLLA composites. The SC improved the mechanical properties of the PLLA composites through the formation of stereocomplex structures. The surface-modified MH nanoparticles showed enhanced mechanical properties due to the stereocomplex structures formed by PLLA chains and inhibited inflammatory responses by pH neutralization as a result of MH. Additionally, the MH nanoparticles containing PLLA composites had antibacterial effects and increased the viability of human vascular endothelial cells. This technology is expected to have great potential in the development of PLLA composite materials for the production of various medical devices, such as cardiovascular stents.
Collapse
|
17
|
Tsuji H, Nogata S, Tsukamoto N, Arakawa Y. Comparative study on the effects of incorporating poly(d,l-lactide) and solvent on stereocomplex crystallization and homocrystallization in unconstrained and constrained poly(l-lactide)/poly(d-lactide) systems. Polym J 2022. [DOI: 10.1038/s41428-022-00701-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
18
|
Polylactide aerogel with excellent comprehensive performances imparted by stereocomplex crystallization for efficient oil-water separation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
19
|
Tsuji H, Osanai K, Arakawa Y. Stereocomplex crystallization behavior and properties of asymmetric combinations of oppositely configured random copolymers based on chiral 2-hydroxyalkanoic acids. Polym J 2022. [DOI: 10.1038/s41428-022-00682-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
20
|
Chu L, Zhao Y, Graf R, Wang XL, Yao YF. Unexpected Role of Short Chains in Entangled Polymer Networks. ACS Macro Lett 2022; 11:669-674. [PMID: 35570809 DOI: 10.1021/acsmacrolett.2c00179] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The knowledge of chain entanglement is key to our understanding of the relation between the viscoelastic properties of polymeric material and their microscopic structure and dynamics. This work conducted a detailed study on the role of short chains in the entangled polymer network. A series of poly(ethylene oxide) (PEO) mixtures with bimodal molecular weight distribution were selected for this study. 1H double-quantum (DQ) NMR combined with the rheology measurement was used to investigate the entangled polymer network. We found that short-chain polymers have the potential to significantly alter the entangled polymer network formed by long-chain polymers. Additionally, both the amount of chain ends and the size of the short-chain polymer were found to have clear disentanglement influences on the entangled polymer network. Moreover, adding low molecular weight PEO to the entangle framework formed by the high molecular weight PEO, resulted in the formation of inhomogeneous entangled polymer networks. The effect of low molecular weight polymers on the entangled polymer networks in PEO melts provides a perspective on the molecular level effect of molecular weight distribution (MWD) on entanglement polymer networks.
Collapse
Affiliation(s)
- Linlin Chu
- Physics Department and Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, North Zhongshan Road 3663, 200062 Shanghai, People’s Republic of China
| | - Yan Zhao
- Key Laboratory of High-Performance Polymer Materials and Technology of Ministry of Education, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Nanostructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Robert Graf
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Xiao-Liang Wang
- Key Laboratory of High-Performance Polymer Materials and Technology of Ministry of Education, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Nanostructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Ye-Feng Yao
- Physics Department and Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, North Zhongshan Road 3663, 200062 Shanghai, People’s Republic of China
| |
Collapse
|
21
|
Xu S, Sun C, Yuan W, Zhou J, Xu W, Zheng Y, Yu C, Pan P. Evolution of thermal behavior, mechanical properties, and microstructure in stereocomplexable poly(lactic acid) during physical ageing. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
22
|
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
|
23
|
Diao H, Song G, Wu J, Zheng X, Zhang J. Stretch-Induced Crystallization of Cellulose Spun from Ionic Liquid Solution. Biomacromolecules 2022; 23:2264-2271. [PMID: 35324155 DOI: 10.1021/acs.biomac.1c01553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
With the emergence of efficient green solvents, structural regulation of regenerated cellulose is highly desired in the solution process from an industrial perspective. Cellulose fiber and films are viewed as a "composite" comprising amorphous and crystalline fractions. The regulation of the crystalline structure is of great importance for the properties of cellulose materials. In this study, we found stretch-induced crystallization behavior during the transition from solution to gel via coagulation. The crystallinity index of the hydrogel fiber increases with the stretch ratio (SR). X-ray diffraction revealed that the cellulose II hydrate formed in the stretched hydrogel fibers. The mechanical properties and thermal stability of the dry fibers greatly improved against the SR. This crystallization behavior depends on the concentration of the solution and the type of ionic liquid. This stretch-induced crystallization provides an efficient method for structural regulation in cellulose solution processing.
Collapse
Affiliation(s)
- Huailing Diao
- University of Chinese Academy of Sciences, Beijing 100039, China.,Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Guangjie Song
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jin Wu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xuejing Zheng
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jun Zhang
- University of Chinese Academy of Sciences, Beijing 100039, China.,Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| |
Collapse
|
24
|
Kwon Y, Ma H, Kim KT. Self-Assembly of Stereoblock Copolymers Driven by the Chain Folding of Discrete Poly( d-lactic acid- b- l-lactic acid) via Intramolecular Stereocomplexation. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yongbeom Kwon
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Hyunji Ma
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Kyoung Taek Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| |
Collapse
|
25
|
Ni L, Xu S, Sun C, Qin Y, Zheng Y, Zhou J, Yu C, Pan P. Retarded Crystallization and Promoted Phase Transition of Freeze-Dried Polybutene-1: Direct Evidence for the Critical Role of Chain Entanglement. ACS Macro Lett 2022; 11:257-263. [PMID: 35574778 DOI: 10.1021/acsmacrolett.1c00794] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Polymorphism and crystal transition are common phenomena of semicrystalline polymers. These two behaviors are known to be controlled by the nucleation and chain mobility of polymers, both of which are constrained by the chain entanglement at the molecular level. However, the role of chain entanglement in polymorphic crystallization and crystal phase transition of polymers has not been well understood. Herein, we use isotactic polybutene-1 (PB-1) as a model polymorphic polymer and present the crucial role of chain entanglement in the polymorphic crystallization kinetics and solid-solid phase transition. A series of less-entangled PB-1 with different entanglement degrees were successfully prepared by freeze-drying the polymer dilute solution. Compared to the bulk sample and re-entangled one, chain disentangling of PB-1 suppressed the crystallization kinetics of form II but significantly increased the phase transition rate and final transition degree from form II to form I. The disentangling-promoted II-I phase transition originated from the reduced nucleation barrier and enhanced chain mobility. This work would advance the in-depth understanding on the formation and transition mechanisms of polymorphic polymer crystals at the molecular level.
Collapse
Affiliation(s)
- Lingling Ni
- 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, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Shanshan Xu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Chenxuan Sun
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Yanan Qin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Ying Zheng
- 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, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Jian Zhou
- 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, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Chengtao Yu
- 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, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - 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, 78 Jiuhua Boulevard North, Quzhou 324000, China
| |
Collapse
|
26
|
Stereocomplex formation and hierarchical structural changes during heating of supramolecular gels obtained by polylactide racemic blends. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
27
|
Tsuji H, Nogata S, Gamo H, Hikima K, Matsuda A, Arakawa Y. Synthesis, stereocomplex crystallization, homo-crystallization, and thermal properties and degradation of enantiomeric aromatic poly(lactic acid)s, poly(mandelic acid)s. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2021.109803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
28
|
Controllable crystallization and lamellar organization in nucleobase-functionalized supramolecular poly(lactic acid)s: Role of poly(lactic acid) stereostructure. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|