高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (5): 499.

• 论文 • 上一篇    下一篇

聚α-甲基苯乙烯为硬段的三嵌段共聚物的合成与性能

李又欣, 蒋硕健, 冯新德   

  1. 北京大学化学系
  • 收稿日期:1987-01-04 出版日期:1988-05-24 发布日期:1988-05-24
  • 通讯作者: 李又欣

Syntheses and Properties of Triblock Copolymers with Poly-α-methylstyrene as Hard Blocks

Li Youxin, Jiang Shuojian, Feng Xinde   

  1. Department of Chemistry, Pelting University, Beijing
  • Received:1987-01-04 Online:1988-05-24 Published:1988-05-24

摘要: 本工作合成了以聚α-甲基苯乙烯(PαMS)为硬段、聚丁二烯(PBD)及氢化聚丁二烯(HPBD)为软段的两种ABA型三嵌段共聚物。研究了其合成方法、结构与性能,虽然这两种三嵌段共聚物软段Tg相近,均在-25℃左右,但由于氢化聚丁二烯的溶度参数很高,与聚α-甲基苯乙烯的相容性大,以致PαMS-HPBD-PαMS的断裂伸长,断裂强度及回弹性和硬段Tg均较之PαMS-PBD-PαMS有明显下降。

关键词: 三嵌段共聚物, 溶度参数, 断裂强度

Abstract: Triblock copolymers with polya-methylstyrene as hard blocks and with poly-butadiene and hydrogenated polybutadiene as soft blocks were synthesized,and their polymerization processes, structures and properties were studied. Although these two kinds of triblock copolymers exhibited the similar Tgs (both about-25℃) of their soft blocks, the tensile strength and elongation of break, resilience and Tg of the hard blocks of PaMS-HPBD-PaMSall are lower evidently than those of PaMS-PBD-PaMS. The reason is that the solubility parameter of HPBDis higher than that of PBD,so the solubility of HPBDin PaMSis higher than that of PBD. The dynamical properties" of PaMS-PBD-PaMSare better than those of ABCtriblock copolymer of PaMS-PBD-PPVL, because it is incompatible between crystalline PPVL and radom PaMS blocks.

Key words: Triblock copolymer, Solubility parameter, Tensile strength

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