Synthesis and characterization of 4-arm star side-chain liquid   crystalline polymers containing azobenzene with different terminal   substituents via ATRP

doi:10.1002/pola.22084

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and characterization of 4-arm star side-chain liquid crystalline polymers containing azobenzene with different terminal substituents via ATRP
	Tang, Xinde ; Gao, Longcheng ; Han, Nianfeng ; Fan, Xinghe ; Zhou, Qifeng
刊名	journal of polymer science part a polymer chemistry
	2007
关键词	4-arm star polymer atom transfer radical polymerization (ATRP) azobenzene linear homopolymer liquid crystalline (LC) polymer star polymers TRANSFER RADICAL POLYMERIZATION RING-OPENING POLYMERIZATION LIVING CATIONIC POLYMERIZATION BLOCK-COPOLYMERS MULTIFUNCTIONAL INITIATORS POLY(ETHYLENE OXIDE) AMPHIPHILIC DIBLOCK POLY(ACRYLIC ACID) MOLECULAR-WEIGHT VINYL ETHER
DOI	10.1002/pola.22084
英文摘要	4-Arm star side-chain liquid crystalline (LQ polymers containing azobenzene with different terminal substituents were synthesized by atom transfer radical polymerization (ATRP). Tetrafunctional initiator prepared by the esterification between pentaerythritol and 2-bromoisobutyryl bromide was utilized to initiate the polymerization of 6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate (MMAzo) and 6-[4-(4-ethoxyphenylazo)phenoxy]hexyl methacrylate (EMAzo), respectively. The 4-arm star side-chain LC polymer with p-methoxyazobenzene moieties exhibits a smectic and a nematic phase, while that with p-ethoxyazobenzene moieties shows only a nematic phase, which derives of different terminal substituents. The star polymers have similar LC behavior to the corresponding linear homopolymers, whereas transition temperatures decrease slightly. Both star polymers show photoresponsive isomerization under the irradiation with UV-vis light. (C) 2007 Wiley Periodicals, Inc.; Polymer Science; SCI(E); EI; 0; ARTICLE; 15; 3342-3348; 45
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249966]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Tang, Xinde,Gao, Longcheng,Han, Nianfeng,et al. Synthesis and characterization of 4-arm star side-chain liquid crystalline polymers containing azobenzene with different terminal substituents via ATRP[J]. journal of polymer science part a polymer chemistry,2007.
APA	Tang, Xinde,Gao, Longcheng,Han, Nianfeng,Fan, Xinghe,&Zhou, Qifeng.(2007).Synthesis and characterization of 4-arm star side-chain liquid crystalline polymers containing azobenzene with different terminal substituents via ATRP.journal of polymer science part a polymer chemistry.
MLA	Tang, Xinde,et al."Synthesis and characterization of 4-arm star side-chain liquid crystalline polymers containing azobenzene with different terminal substituents via ATRP".journal of polymer science part a polymer chemistry (2007).