高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (10): 1638.

• 论文 • 上一篇    下一篇

稀土配位催化环硫氯丙烷与环氧氯丙烷共聚合研究

孙维林, 沈之荃, 李维实, 张一烽   

  1. 1. 浙江大学高分子科学及工程学系, 杭州, 310027
  • 收稿日期:1995-11-21 出版日期:1996-10-24 发布日期:1996-10-24
  • 通讯作者: 沈之荃
  • 作者简介:孙维林,男,38岁,现在中国科学院化学研究所做博士后(邮编:100080)
  • 基金资助:

    国家自然科学基金

Studies on the Copolymerization of Chloromethylthiirane with Epichlorohydrin by Rare Earth Coordination Catalysts

SUN Wei-Lin, SHEN Zhi-Quan, LI Wei-Shi, ZHANG Yi-Feng   

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027
  • Received:1995-11-21 Online:1996-10-24 Published:1996-10-24

PDF (PC)

被引次数

4

摘要： 研究了稀土配位催化剂对难以开环均聚和共聚的环硫氯丙烷(CMT)与环氧氯丙烷(ECH)的共聚合。发现稀土乙酰丙酮盐、环烷酸盐等与异丁基铝、水组成的络合催化剂有良好的催化活性,能制备得到类交替共聚物,产率高达60%以上,分子量颇高([η]=0.15dL/g).应用IR、13CNMR、GPC、VPO等测试手段对共聚物的结构和分子量进行了表征,测定CMT(1)与ECH(2)共聚合的竞聚率分别为r1=0.022、r2=0.097.

关键词: 稀土配位催化剂, 环硫氯丙烷, 环氧氯丙烷, 开环共聚合反应, 竞聚率测定

Abstract: The copolymerization of chloromethylthiirane(CMT) with epichlorohydrin(ECH) was investigated by using rare earth coordination catalysts for the first time.It has been discovered that rare earth coordination catalysts,especially Nd (acac)3-Al(i-Bu)3 and Nd(naph)3-Al(i-Bu)3 are highly active catalysts for the copolymerization giving rather high molecular weight([η]=0.16 dL/g) alternate-rich copolymer in fairly high yield(～60%),and the catalytic efficiency of Nd(acac)3-Al(i-Bu)3 reached 10000 g copolymer/mol Nd.The characteristics of the copolymerization of CMTand ECHwith Na(acac)3-Al(i-Bu)3 had been studied in detail.The reactivity ratio of CMT(1) and ECH(2) was obtained to be 0.22(r1) and 0.097(r2) from the sulfur contents of the copolymers determined by oxygen combustion method.The structure and the molecular weight of copolymer were characterized by IR,13C NMR,GPC and VPO.

Key words: Rare earth coordination catalysts, Chloromethylthiirane(CMT), Epichlorohydrin(ECH), Ring-opening copolymerization, Reactivity ratio determination

TrendMD: