Immortal ring-opening polymerization of epsilon-caprolactone by a neat magnesium catalyst system: an approach to obtain block and amphiphilic star polymers in situ

	Immortal ring-opening polymerization of epsilon-caprolactone by a neat magnesium catalyst system: an approach to obtain block and amphiphilic star polymers in situ
	Wang, Yang ; Liu, Bo ; Wang, Xue ; Zhao,Wei ; Liu,Dongtao ; Liu,Xinli ; Cui,Dongmei
刊名	polymer chemistry
	2014
卷号	5 期号:15 页码:4580-4588
关键词	THIOL-ENE CLICK AMINO CALCIUM CATALYST CYCLIC ESTERS L-LACTIDE ALUMINUM COMPLEXES LIVING POLYMERIZATION DELTA-VALEROLACTONE YTTRIUM ALKOXIDES MACROMOLECULAR ARCHITECTURES BIODEGRADABLE POLYESTERS
通讯作者	liu,xl
英文摘要	catalyst systems obtained from the inexpensive, ligand-free and commercially available (mgbu2)-bu-n and alcohols were used for the ring-opening polymerization (rop) of epsilon-caprolactone (epsilon-cl) under mild conditions. the catalytic system of (mgbu2)-bu-n/ph2choh showed very high activity as compared with the system of (mgbu2)-bu-n/ph3coh, which applied a more bulky methanol derivative. interestingly, in the presence of excess amount of alcohol (ph2choh), i.e., varying the oh-to-mg ratio in a wide range from 10 : 1 to 800 : 1, the system (mgbu2)-bu-n/ph2choh still remained highly active, and produced up to 800 polycaprolactone (pcl) chains per mg center, suggesting a "living immortal" polymerization mode. the molecular weights of the obtained pcls are accurately controlled when the ratio of [cl](0)/[mg](0) changed from 500 to 8000 together with narrow molecular weight distributions. moreover, diblock pcl-b-pla copolymers with narrow pdis have been facilely achieved. furthermore, the allyl- and propargyl-functionalized diphenylmethanols could be employed as the chain transfer agents (cta) in this system for in situ construction of allyl-and propargyl-functionalized pcls that were facilely modified further to pcls with multiple functionality as building blocks for amphiphilic and topological microstructured pcls via coupling and click reactions.
收录类别	SCI
语种	英语
WOS记录号	WOS:000339044000021
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/53003]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Wang, Yang,Liu, Bo,Wang, Xue,et al. Immortal ring-opening polymerization of epsilon-caprolactone by a neat magnesium catalyst system: an approach to obtain block and amphiphilic star polymers in situ[J]. polymer chemistry,2014,5(15):4580-4588.
APA	Wang, Yang.,Liu, Bo.,Wang, Xue.,Zhao,Wei.,Liu,Dongtao.,...&Cui,Dongmei.(2014).Immortal ring-opening polymerization of epsilon-caprolactone by a neat magnesium catalyst system: an approach to obtain block and amphiphilic star polymers in situ.polymer chemistry,5(15),4580-4588.
MLA	Wang, Yang,et al."Immortal ring-opening polymerization of epsilon-caprolactone by a neat magnesium catalyst system: an approach to obtain block and amphiphilic star polymers in situ".polymer chemistry 5.15(2014):4580-4588.