Acyclic diene metathesis polymerization of tailor-made monomers towards   sequence-regulated vinyl copolymers

doi:10.1007/s10118-013-1227-6

CORC > 北京大学 > 化学与分子工程学院

	Acyclic diene metathesis polymerization of tailor-made monomers towards sequence-regulated vinyl copolymers
	Li, Zi-long ; Li, Lei ; Du, Fu-sheng ; Li, Zi-chen
刊名	高分子科学英文版
	2013
关键词	ADMET ATRA Sequence-regulated copolymers RADICAL POLYMERIZATION PRECISION POLYETHYLENE ADMET POLYMERIZATION PERIODIC COPOLYMERS OLEFIN METATHESIS BRANCH FREQUENCY ISOMERIZATION BEHAVIOR
DOI	10.1007/s10118-013-1227-6
英文摘要	Acyclic diene metathesis polymerization (ADMET) enables convenient transfer of sequential information of the designed monomers to the corresponding sequence-regulated copolymers. In this study, two structurally symmetric monomers, M1 and M2, were synthesized via atom transfer radical addition (ATRA) of diethyl meso-2,5-dibromohexanedioate with 1,5-hexadiene and 1,7-octadiene, respectively. Thus, sequenced segment of VB-EA-EA-VB (VB and EA represent vinyl bromide and ethyl acrylate, respectively) was incorporated into the ADMET diene monomers. ADMET polymerization of these two monomers with Grubbs first generation catalyst (Grubbs-I) was performed in CH2Cl2 at 40A degrees C for 5 days under nitrogen purge. Effects of catalyst amount, monomer concentration and methanol precipitation on the M (p) and PDI of polymers were investigated by GPC, and the structures of the formed polymers were characterized by NMR. Our results indicate that using 3.0 mol% of Grubbs-I to monomer can afford polymers with high M (p). Moreover, selective precipitation in methanol enables complete removal of low molecular weight components from the crude products. Meanwhile, M2 exhibits higher ADMET polymerization reactivity than M1 due to its capability of suppressing negative neighboring group effect.; Polymer Science; SCI(E); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 2; ARTICLE; 2; 355-362; 31
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150805]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Li, Zi-long,Li, Lei,Du, Fu-sheng,et al. Acyclic diene metathesis polymerization of tailor-made monomers towards sequence-regulated vinyl copolymers[J]. 高分子科学英文版,2013.
APA	Li, Zi-long,Li, Lei,Du, Fu-sheng,&Li, Zi-chen.(2013).Acyclic diene metathesis polymerization of tailor-made monomers towards sequence-regulated vinyl copolymers.高分子科学英文版.
MLA	Li, Zi-long,et al."Acyclic diene metathesis polymerization of tailor-made monomers towards sequence-regulated vinyl copolymers".高分子科学英文版 (2013).