高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (10): 942.

• 论文 • 上一篇    下一篇

以聚α,α-二甲基-β-丙内酯为硬段的三嵌段共聚物的合成与性质

李又欣, 蒋硕健, 冯新德   

  1. 北京大学化学系
  • 收稿日期:1986-01-08 出版日期:1987-10-24 发布日期:1987-10-24

Syntheses and Behavior of Copolymers with Polypivalolactone as Hard Blocks

Li Youxin, Jiang Shuojian, Feng Xinde   

  1. Department of Chemistry, Peking University, Beijing
  • Received:1986-01-08 Online:1987-10-24 Published:1987-10-24

PDF (PC)

摘要： 合成了以聚α,α-二甲基-β-丙内酯(PPVL)为硬段,聚己二酸1,2-丙二醇酯(PPA)、聚丁二烯(PBD)及氢化聚丁二烯(HPBD)为软段的ABA型嵌段共聚物及以聚α-甲基苯乙烯(PαMS)和PPVL为硬段,PBD为软段的ABC型嵌段共聚物。发现嵌段共聚物中PPVL的1/Tm∝[软段]/[PPVL],软段含量对降低Tm与力学性能的影响均为PPVL-PPA-PPVL>PPVL-HPBD-PPVL>PPVL-PBD-PPVL,符合软硬段相容性下降的趋势;PPVL-PBD-PαMS的力学性能低于PPVL-PBD-PPVL与PαMS-PBD-PαMS,是因结晶的PPVL与无规的PαMS互不相容。

Abstract: ABA triblock copolymers with polypivalolactone(PPVL) as hard blocks and with polyl, 2-propandiol adipic acid esters(PPA), polybutadienc(PBD) and hydro-genated polybutadiene(HPBD) as soft blocks such as PPVL-PPA-PPVL, PPVL-PBD-PPVLand PPVL-HPBD-PPVL, and ABC triblock copolymer with PPVL and polya-methylstyrene (PaMS) as hard blocks and PBDas soft block, such as PPVL-PBD-PaMS were synthesized. It was discovered that there existed linear relationships of 1/Tm(Tm, melting point of crystalline PPVLin copolymers) against [ssoft block][/PPVL].The effects of lowering Tms and dynamical properties by contents of soft blocks in copalymers are in the order of PPVL-PPA-PPVL> PPVL-HPBD-PPVL>PPVL-PBD-PPVL corresponding to the order compatibilities between soft and hard blocks. But the dynamical properties of PPVL-PBD-PaMS are -lower than that of PPVL-PBD-PPVL and PaMS-PBD-PaMS because it is imcompatible between crystalline PPVL and random PaMS blocks.

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