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Chen JY, Zhang XW, Wu TY, Ye HM. Co-Crystallization between Aliphatic Polyesters through Co-Inclusion Complexation with Small Molecule. Molecules 2023; 28:molecules28104091. [PMID: 37241832 DOI: 10.3390/molecules28104091] [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: 04/03/2023] [Revised: 05/05/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Crystalline/crystalline blends of polymer have shown advantages in the preparation of new polymeric materials. However, the regulation of co-crystallization in a blend is still full of challenges due to the preferential self-crystallization driven by thermodynamics. Here, an inclusion complex approach is proposed to facilitate the co-crystallization between crystalline polymers, because the crystallization process displays a prominent kinetics advantage when polymer chains are released from the inclusion complex. Poly(butylene succinate) (PBS), poly(butylene adipate) (PBA) and urea are chosen to form co-inclusion complexes, where PBS and PBA chains play as isolated guest molecules and urea molecules construct the host channel framework. The coalesced PBS/PBA blends are obtained by fast removing the urea framework and systematically investigated by differential scanning calorimetry, X-ray diffraction, proton nuclear magnetic resonance and Fourier transformation infrared spectrometry. It is demonstrated that PBA chains are co-crystallized into PBS extended-chain crystals in the coalesced blends, while such a phenomenon has not been detected in simply co-solution-blended samples. Though PBA chains could not be totally accommodated in the PBS extended-chain crystals, their co-crystallized content increases with the initial feeding ratio of PBA. Consequently, the melting point of the PBS extended-chain crystal gradually declines from 134.3 °C to 124.2 °C with an increasing PBA content. The PBA chains playing as defects mainly induce lattice expansion along the a-axis. In addition, when the co-crystals are soaked in tetrahydrofuran, some of the PBA chains are extracted out, leading to damage to the correlative PBS extended-chain crystals. This study shows that co-inclusion complexation with small molecules could be an effective way to promote co-crystallization behavior in polymer blends.
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Affiliation(s)
- Jia-Yao Chen
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum, Beijing 102249, China
| | - Xue-Wen Zhang
- Beijing Institute of Space Launch Technology, Beijing 100076, China
| | - Tian-Yu Wu
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum, Beijing 102249, China
| | - Hai-Mu Ye
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum, Beijing 102249, China
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2
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Scheuer K, Bandelli D, Helbing C, Weber C, Alex J, Max JB, Hocken A, Stranik O, Seiler L, Gladigau F, Neugebauer U, Schacher FH, Schubert US, Jandt KD. Self-Assembly of Copolyesters into Stereocomplex Crystallites Tunes the Properties of Polyester Nanoparticles. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01247] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karl Scheuer
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, Jena 07743, Germany
| | - Damiano Bandelli
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Christian Helbing
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, Jena 07743, Germany
| | - Christine Weber
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Julien Alex
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Johannes B. Max
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Alexis Hocken
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, Jena 07743, Germany
| | - Ondrej Stranik
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07743, Germany
| | - Lisa Seiler
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07743, Germany
- Institute of Physical Chemistry and Abbe School of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Frederike Gladigau
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07743, Germany
- Institute of Physical Chemistry and Abbe School of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Ute Neugebauer
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07743, Germany
- Institute of Physical Chemistry and Abbe School of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
- Center for Sepsis Control and Care, Jena University Hospital, Am Klinikum 1, Jena 07747, Germany
| | - Felix H. Schacher
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
| | - Klaus D. Jandt
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, Jena 07743, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, Jena 07743, Germany
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3
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Tsuji H, Tamura KI, Arakawa Y. A versatile strategy for the synthesis and mechanical property manipulation of networked biodegradable polymeric materials composed of well-defined alternating hard and soft domains. RSC Adv 2019; 9:7094-7106. [PMID: 35519995 PMCID: PMC9062625 DOI: 10.1039/c9ra00255c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 02/15/2019] [Indexed: 12/29/2022] Open
Abstract
Networked materials composed of well-defined alternating domains of two types of biodegradable polymers, hard poly(l-lactide) and soft poly(ε-caprolactone), were successfully synthesized.
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Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Ken-ichi Tamura
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Yuki Arakawa
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
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4
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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]
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5
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Cocrystallization of monomer units of biobased and biodegradable Poly(l-lactic acid-co-glycolic acid) random copolymers. Polym J 2018. [DOI: 10.1038/s41428-018-0093-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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Tsuji H, Sato S, Masaki N, Arakawa Y, Kuzuya A, Ohya Y. Synthesis, stereocomplex crystallization and homo-crystallization of enantiomeric poly(lactic acid-co-alanine)s with ester and amide linkages. Polym Chem 2018. [DOI: 10.1039/c7py02024d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-Hydroxy acid and α-amino acid-derived poly(l-lactic acid-co-l-alanine)s and poly(d-lactic acid-co-d-alanine)s with different alanine unit contents were synthesized and their stereocomplex crystallization and homo-crystallization were investigated.
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Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Shotaro Sato
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
| | - Noriaki Masaki
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Yuki Arakawa
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Akinori Kuzuya
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
| | - Yuichi Ohya
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
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7
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Tsuji H, Arakawa Y. Synthesis, properties, and crystallization of the alternating stereocopolymer poly(l-lactic acid-alt-d-lactic acid) [syndiotactic poly(lactic acid)] and its blend with isotactic poly(lactic acid). Polym Chem 2018. [DOI: 10.1039/c8py00391b] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The alternating stereocopolymer poly(l-lactic acid-alt-d-lactic acid) or syndiotactic poly(lactic acid) was successfully synthesized by the condensation of the l-lactic acid-d-lactic acid dimer.
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Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Yuki Arakawa
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
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8
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Tsuji H, Sakamoto Y, Arakawa Y. Stereocomplex- and Homo-Crystallization and Phase-Transition Behavior of Relatively High-Molecular-Weight Linear One- and Two-Armed and Star-Shaped Four-Armed Poly(l
-lactide)/Poly(d
-lactide) Blends. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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
| | - Yuzuru Sakamoto
- 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
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9
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Tsuji H, Noda S, Kimura T, Sobue T, Arakawa Y. Configurational Molecular Glue: One Optically Active Polymer Attracts Two Oppositely Configured Optically Active Polymers. Sci Rep 2017; 7:45170. [PMID: 28338051 PMCID: PMC5364539 DOI: 10.1038/srep45170] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 02/20/2017] [Indexed: 01/22/2023] Open
Abstract
D-configured poly(D-lactic acid) (D-PLA) and poly(D-2-hydroxy-3-methylbutanoic acid) (D-P2H3MB) crystallized separately into their homo-crystallites when crystallized by precipitation or solvent evaporation, whereas incorporation of L-configured poly(L-2-hydroxybutanoic acid) (L-P2HB) in D-configured D-PLA and D-P2H3MB induced co-crystallization or ternary stereocomplex formation between D-configured D-PLA and D-P2H3MB and L-configured L-P2HB. However, incorporation of D-configured poly(D-2-hydroxybutanoic acid) (D-P2HB) in D-configured D-PLA and D-P2H3MB did not cause co-crystallization between D-configured D-PLA and D-P2H3MB and D-configured D-P2HB but separate crystallization of each polymer occurred. These findings strongly suggest that an optically active polymer (L-configured or D-configured polymer) like unsubstituted or substituted optically active poly(lactic acid)s can act as "a configurational or helical molecular glue" for two oppositely configured optically active polymers (two D-configured polymers or two L-configured polymers) to allow their co-crystallization. The increased degree of freedom in polymer combination is expected to assist to pave the way for designing polymeric composites having a wide variety of physical properties, biodegradation rate and behavior in the case of biodegradable polymers.
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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
| | - Soma Noda
- Department of Environmental and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Takayuki Kimura
- Department of Environmental and Life Sciences, Graduate School of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan
| | - Tadashi Sobue
- 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
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10
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Ma P, Yu Q, Shen T, Dong W, Chen M. Strong synergetic effect of fibril-like nucleator and shear flow on the melt crystallization of poly( l -lactide). Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Shen T, Ma P, Yu Q, Dong W, Chen M. The Effect of Thermal History on the Fast Crystallization of Poly(l-Lactide) with Soluble-Type Nucleators and Shear Flow. Polymers (Basel) 2016; 8:E431. [PMID: 30974706 PMCID: PMC6432256 DOI: 10.3390/polym8120431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/24/2016] [Accepted: 12/01/2016] [Indexed: 11/16/2022] Open
Abstract
The N₁,N₁'-(ethane-1,2-diyl)bis(N₂-phenyloxalamide) (OXA) is a soluble-type nucleator with a dissolving temperature of 230 °C in poly(l-lactic acid) (PLLA) matrix. The effect of thermal history and shear flow on the crystallization behavior of the PLLA/OXA samples was investigated by rheometry, polarized optical microscopy (POM), differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and scanning electron microscopy (SEM). The crystallization process of the PLLA/OXA-240 sample (i.e., pre-melted at 240 °C) was significantly promoted by applying a shear flow, e.g., the onset crystallization time (tonset) of the PLLA at 155 °C was reduced from 1600 to 200 s after shearing at 0.4 rad/s for even as short as 1.0 s, while the crystallinity (Xc) was increased to 40%. Moreover, the tonset of the PLLA/OXA-240 sample is 60%⁻80% lower than that of the PLLA/OXA-200 sample (i.e., pre-melted at 200 °C) with a total shear angle of 2 rad, indicating a much higher crystallization rate of the PLLA/OXA-240 sample. A better organization and uniformity of OXA fibrils can be obtained due to a complete pre-dissolution in the PLLA matrix followed by shear and oscillation treatments. The well dispersed OXA fibrils and flow-induced chain orientation are mainly responsible for the fast crystallization of the PLLA/OXA-240 samples. In addition, the shear flow created some disordered α'-form crystals in the PLLA/OXA samples regardless of the thermal history (200 or 240 °C).
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Affiliation(s)
- Tianfeng Shen
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
| | - Piming Ma
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
| | - Qingqing Yu
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
| | - Weifu Dong
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
| | - Mingqing Chen
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
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12
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Tsuji H, Ogawa M, Arakawa Y. Homo- and Stereocomplex Crystallization of Star-Shaped Four-Armed Stereo Diblock Copolymers of Crystalline and Amorphous Poly(lactide)s: Effects of Incorporation and Position of Amorphous Blocks. J Phys Chem B 2016; 120:11052-11063. [DOI: 10.1021/acs.jpcb.6b07987] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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
| | - Michiaki Ogawa
- 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
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13
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Tsuji H, Tamai K, Kimura T, Kubota A, Tahahashi A, Kuzuya A, Ohya Y. Stereocomplex- and homo-crystallization of blends from 2-armed poly(l-lactide) and poly(d-lactide) with identical and opposite chain directional architectures and of 2-armed stereo diblock poly(lactide). POLYMER 2016. [DOI: 10.1016/j.polymer.2016.04.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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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
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15
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Ma P, Xu Y, Shen T, Dong W, Chen M, Lemstra PJ. Tailoring the crystallization behavior of poly(L-lactide) with self-assembly-type oxalamide compounds as nucleators: 1. Effect of terminal configuration of the nucleators. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.07.040] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Tsuji H, Sobue T. Cocrystallization of monomer units in lactic acid-based biodegradable copolymers, poly(l-lactic acid-co-l-2-hydroxybutanoic acid)s. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.07.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Stereocomplex crystallization and homo-crystallization of enantiomeric substituted poly(lactic acid)s, poly(2-hydroxy-3-methylbutanoic acid)s. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.05.056] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Highly accelerated stereocomplex crystallization by blending star-shaped 4-armed stereo diblock poly(lactide)s with poly( d -lactide) and poly( l -lactide) cores. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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