摘要
使用烷基铝-乙酰丙酮-水体系催化环氧化合物的聚合,可得到分子量百万以上的聚合物,Kida采用三异丁基铝-强磷酸-N,N二甲基苯胺体系对环氧化合物进行催化聚合,Wolfe采用三烷基铝一乙酰丙酮-苯基噻唑-水体系对环氧化合物进行催化聚合,Kuran采用连苯三酚-二乙基锌对环氧丙烷进行催化,并且对聚合物作了^(13)C-NMR谱的研究,1985年Bovey等研究了聚环氧丙烷的氢谱,确定了聚环氧丙烷各种异构体的构型。
A catalytic system, (C_(2)H_(5))_(3)A1/ROPO(OH)_(2), exhibits higher activity in the polymerization of propylene oxide(PO), The polypropylene oxide and its crystalline acetone-insoluble fraction were determined by the _(13)C-NMR.In the _(13)C-NMR spectra of the PPO, we discovered the most direct way of identifying the two kinds of lines. As an illustration, the two kinds of lines in _(13)C-NMR were due to results of methine and methylene carbons of a high molecular weight PPO, respectively. Chemical-shift and split of four configuration of isotactic, heterotactic and syndiotactic have already been compared for the PPO with different catalytic systems, (C_(2)H_(5))_(3)A1/ROPO(OH)_(2), (C_(2)H_(5))_(3)A1/H_(3)PO_(4),and(C_(2)H_(5))_(3)Al/Ac/H_(2)O.
作者
叶鸿伟
王新灵
胡耿源
杨士林
Ye Hongwei;Wang Xinling;Hu Gengyuan;Yang Shilin(Central Laboratory,Zhejiang University,Hangzhou;Department of Chemistry,Zhejiang University,Hangzhou)
出处
《高等学校化学学报》
SCIE
EI
CAS
1987年第9期856-858,共3页
Chemical Journal of Chinese Universities
基金
中国科学院科学基金资助课题.
