Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain

Yuji Higaki; Ken Suzuki; Yudai Kiyoshima; Tomoyuki Toda; Masayoshi Nishiura; Noboru Ohta; Hiroyasu Masunaga; Zhaomin Hou; Atsushi Takahara

doi:10.1021/acs.macromol.7b01193

Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain

Yuji Higaki, Ken Suzuki, Yudai Kiyoshima, Tomoyuki Toda, Masayoshi Nishiura, Noboru Ohta, Hiroyasu Masunaga, Zhaomin Hou, Atsushi Takahara

Department of Applied Molecular Chemistry

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Molecular aggregation structure and mechanical as well as thermal properties of novel well-defined multiblock copolymers consisting of crystalline syndiotactic polystyrene (sPS) and rubbery hydrogenated polyisoprene (hPIp) were investigated. The morphology and crystalline ordered structure of the multiblock copolymer films prepared by solvent casting from 1,2-dichlorobenzene solution depended on the volume fraction of sPS (VF_sPS) and number of blocks. The multiblock copolymer films exhibited ordered morphology with low crystallinity. The crystallinity of the sPS reduced with decreasing the VF_sPS. The pentablock copolymer produced more ordered morphology and less crystallinity than the triblock copolymers. The anisotropic orientation and mechanical stability of the δ form sPS crystals in the spherical sPS domains during uniaxial stretching were demonstrated. Tensile testing and dynamic mechanical analysis indicated that these multiblock copolymer films with appropriate sPS fraction are strong, tough, and elastic and thus could be potential candidates for a new type of thermoplastic elastomer with discrete crystalline hard domains.

Original language	English
Pages (from-to)	6184-6191
Number of pages	8
Journal	Macromolecules
Volume	50
Issue number	16
DOIs	https://doi.org/10.1021/acs.macromol.7b01193
Publication status	Published - Aug 22 2017

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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@article{8054fd6008084777a65bc95d25b20007,

title = "Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain",

abstract = "Molecular aggregation structure and mechanical as well as thermal properties of novel well-defined multiblock copolymers consisting of crystalline syndiotactic polystyrene (sPS) and rubbery hydrogenated polyisoprene (hPIp) were investigated. The morphology and crystalline ordered structure of the multiblock copolymer films prepared by solvent casting from 1,2-dichlorobenzene solution depended on the volume fraction of sPS (VFsPS) and number of blocks. The multiblock copolymer films exhibited ordered morphology with low crystallinity. The crystallinity of the sPS reduced with decreasing the VFsPS. The pentablock copolymer produced more ordered morphology and less crystallinity than the triblock copolymers. The anisotropic orientation and mechanical stability of the δ form sPS crystals in the spherical sPS domains during uniaxial stretching were demonstrated. Tensile testing and dynamic mechanical analysis indicated that these multiblock copolymer films with appropriate sPS fraction are strong, tough, and elastic and thus could be potential candidates for a new type of thermoplastic elastomer with discrete crystalline hard domains.",

author = "Yuji Higaki and Ken Suzuki and Yudai Kiyoshima and Tomoyuki Toda and Masayoshi Nishiura and Noboru Ohta and Hiroyasu Masunaga and Zhaomin Hou and Atsushi Takahara",

note = "Funding Information: This work was supported by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). This work was supported by the Photon and Quantum Basic Research Coordinated Development Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan. This work was performed under the Cooperative Research Program of “Network Joint Research Center for Materials and Devices”. The synchrotron radiation experiments were performed at BL40B2 (2014B1368, 2016A1020), BL40XU (2013B1442, 2014A1250, 2015B1519), and BL03XU (2013B7261) in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI). Dr. Yasushi Okamoto and Mr. Takashi Aoki (DENSO CORP.) are also gratefully acknowledged for kindly providing the opportunity to conduct the experiments in BL03XU. Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = aug,

day = "22",

doi = "10.1021/acs.macromol.7b01193",

language = "English",

volume = "50",

pages = "6184--6191",

journal = "Macromolecules",

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publisher = "American Chemical Society",

number = "16",

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T1 - Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain

AU - Higaki, Yuji

AU - Suzuki, Ken

AU - Kiyoshima, Yudai

AU - Toda, Tomoyuki

AU - Nishiura, Masayoshi

AU - Ohta, Noboru

AU - Masunaga, Hiroyasu

AU - Hou, Zhaomin

AU - Takahara, Atsushi

N1 - Funding Information: This work was supported by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). This work was supported by the Photon and Quantum Basic Research Coordinated Development Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan. This work was performed under the Cooperative Research Program of “Network Joint Research Center for Materials and Devices”. The synchrotron radiation experiments were performed at BL40B2 (2014B1368, 2016A1020), BL40XU (2013B1442, 2014A1250, 2015B1519), and BL03XU (2013B7261) in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI). Dr. Yasushi Okamoto and Mr. Takashi Aoki (DENSO CORP.) are also gratefully acknowledged for kindly providing the opportunity to conduct the experiments in BL03XU. Publisher Copyright: © 2017 American Chemical Society.

PY - 2017/8/22

Y1 - 2017/8/22

N2 - Molecular aggregation structure and mechanical as well as thermal properties of novel well-defined multiblock copolymers consisting of crystalline syndiotactic polystyrene (sPS) and rubbery hydrogenated polyisoprene (hPIp) were investigated. The morphology and crystalline ordered structure of the multiblock copolymer films prepared by solvent casting from 1,2-dichlorobenzene solution depended on the volume fraction of sPS (VFsPS) and number of blocks. The multiblock copolymer films exhibited ordered morphology with low crystallinity. The crystallinity of the sPS reduced with decreasing the VFsPS. The pentablock copolymer produced more ordered morphology and less crystallinity than the triblock copolymers. The anisotropic orientation and mechanical stability of the δ form sPS crystals in the spherical sPS domains during uniaxial stretching were demonstrated. Tensile testing and dynamic mechanical analysis indicated that these multiblock copolymer films with appropriate sPS fraction are strong, tough, and elastic and thus could be potential candidates for a new type of thermoplastic elastomer with discrete crystalline hard domains.

AB - Molecular aggregation structure and mechanical as well as thermal properties of novel well-defined multiblock copolymers consisting of crystalline syndiotactic polystyrene (sPS) and rubbery hydrogenated polyisoprene (hPIp) were investigated. The morphology and crystalline ordered structure of the multiblock copolymer films prepared by solvent casting from 1,2-dichlorobenzene solution depended on the volume fraction of sPS (VFsPS) and number of blocks. The multiblock copolymer films exhibited ordered morphology with low crystallinity. The crystallinity of the sPS reduced with decreasing the VFsPS. The pentablock copolymer produced more ordered morphology and less crystallinity than the triblock copolymers. The anisotropic orientation and mechanical stability of the δ form sPS crystals in the spherical sPS domains during uniaxial stretching were demonstrated. Tensile testing and dynamic mechanical analysis indicated that these multiblock copolymer films with appropriate sPS fraction are strong, tough, and elastic and thus could be potential candidates for a new type of thermoplastic elastomer with discrete crystalline hard domains.

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U2 - 10.1021/acs.macromol.7b01193

DO - 10.1021/acs.macromol.7b01193

M3 - Article

AN - SCOPUS:85027830454

SN - 0024-9297

VL - 50

SP - 6184

EP - 6191

JO - Macromolecules

JF - Macromolecules

IS - 16

ER -

Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain

Abstract

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