Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain
Molecular Aggregation States and Physical Properties of Syndiotactic Polystyrene/Hydrogenated Polyisoprene Multiblock Copolymers with Crystalline Hard Domain
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DOI：
10.1021/acs.macromol.7b01193
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发表时间：
2017-08
期刊：
影响因子：
5.5
通讯作者：
Y. Higaki;Ken Suzuki;Yudai Kiyoshima;Tomoyuki Toda;M. Nishiura;N. Ohta;H. Masunaga;Z. Hou;
中科院分区：
文献类型：
--
作者：
Y. Higaki;Ken Suzuki;Yudai Kiyoshima;Tomoyuki Toda;M. Nishiura;N. Ohta;H. Masunaga;Z. Hou;
研究了由结晶间规聚苯乙烯（sPS）和橡胶状氢化聚异戊二烯（hPIp）组成的新型多嵌段共聚物的分子聚集态结构、力学性能和热性能。由1，2-二氯苯溶液通过溶剂浇铸制备的多嵌段共聚物膜的形态和结晶有序结构取决于sPS的体积分数（VFsPS）和嵌段数。多嵌段共聚物薄膜具有较低的结晶度和有序的形貌。随着VFsPS含量的降低，sPS的结晶度降低。五嵌段共聚物比三嵌段共聚物产生更有序的形态和更低的结晶度。结果表明，在单轴拉伸过程中，δ型sPS晶体在球形sPS畴中具有各向异性取向和力学稳定性。拉伸测试和动态力学分析表明，适当sPS含量的多嵌段共聚物膜具有强度高、坚韧好、耐腐蚀等优点。
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 e...