高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (9): 1007.

• 研究论文 • 上一篇    下一篇

二步法合成凝胶星型聚合物

殷锐, 沈家骢   

  1. 吉林大学化学系
  • 收稿日期:1989-02-20 出版日期:1990-09-24 发布日期:1990-09-24
  • 通讯作者: 殷锐, 130023

Synthesis of Gel-Star Polymer by Two Steps

Yin Rui, Shen Jiacong   

  1. Department of Chemistry, Jilin University, Changchun
  • Received:1989-02-20 Online:1990-09-24 Published:1990-09-24

摘要: 用含悬吊双键的微胶核为偶联剂,合成了不同支化度的苯乙烯-异戊二烯凝胶星型聚合物。紫外光谱测试发现二乙烯基苯可控制双键含量,链转移剂对微胶核的分子量影响较大。GPC跟踪偶联反应表明,偶联反应是快步骤,偶联度的增加是慢过程。要提高聚合物的支化度,必须考虑到空间位阻效应和双键包埋的影响。

关键词: 星型聚合物, 苯乙烯, 异戊二烯

Abstract: In this paper, the styrene-isoprene gel-star block copolyrqer with different branching degrees was synthesized by using gel uncleus with pendant vinyl groups to be a crossolinking agent. It was found that divinylbenzene could control the number of vinyl groups which were measured by UV spec-trometry, and chain transfer agent had a serious effect on the molecular weight of gel nucleus. Following crosslinking reaction by GPC, we revealed that increasing the branching degrees was slow step. In order to get higher branching degree, we must consider the'space hinderance and being wrapped of vinyl groups.

Key words: Star polymer, Styrene, Isoprene

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