稀土络合催化环氧氯丙烷开环聚合动力学及其反应机理的研究  

KINETICS AND MECHANISM OF RING-OPENING POLYMERIZATION OF EPICHLOROHYDRIN IN THE PRESENCE OF RARE EARTH COORDINATION CATALYST SYSTEM

作　　者：孙俊全[1] 胡培战[1] 沈之荃[1] 

机构地区：[1]浙江大学化学系

出　　处：《Chinese Journal of Catalysis》1989年第3期301-308,共8页催化学报（英文）

基　　金：国家自然科学基金;中国石化总公司资助的课题

摘　　要：研究了环氧氯丙烷在Nd(P_(204))_3-Al(i-Bu)_3-H_2O三元稀土络合催化体系中的开环聚合动力学。测定了聚合反应速率对单位浓度及催化剂浓度的关系。测定了在该聚合体系下的聚合反应活化能。初步提出了快速引发、活性中心双基失活和向烷基铝发生转移的机理。P_(204)=[C_4H_7CH(C_2H_5)-CH_2O]_2-P-OH.The kinetics of ring-opening polymerization of epichlorohydrin in the presence of Nd(P204)3-Al(i-Bu)3-H2O catalyst system was studied. The results indicated that the polymerization rate of propagation was zero order with respect to monomer concentration and first order with respect to catalyst concentration.The activation energy of polymerization was equal to 37.4kJ/mol. The initiation step was considered to be instantaneous, and the termination reaction was shown to be a bimolecular process in the polymerization under given conditions.

关 键 词：环氧氯丙烷 开环聚合 钕-铝-水系 

分 类 号：O623.425[理学—有机化学]