Formation of mesophase mono-domains and micro-structures in thin films of a series of copolyethers containing both odd-numbered methylene units

	Formation of mesophase mono-domains and micro-structures in thin films of a series of copolyethers containing both odd-numbered methylene units
	Xie FC ; Liu JP ; Yan DH ; He TB ; Zheng RQ ; Chen EQ
刊名	chinese journal of polymer science
	2001
卷号	19 期号:4 页码:391-397
关键词	CRYSTALLINE TPP POLYETHERS ORDERED SMECTIC PHASES EVEN NUMBERS IDENTIFICATION EVOLUTION
ISSN号	0256-7679
通讯作者	he tb
中文摘要	the structural and morphological evolution of mono-domains in thin films has been investigated for a series of liquid crystalline (lc) copolyethers. the copolyethers studied were synthesized by the reaction of 1-(4-hydroxy-4 ' -biphenylyl)-2-(4-hydroxyl-phenyl)propane (tpp) with 1,7-dibromoheptane and 1,11-undecane at different compositions (cotpps-7/11). in contrast to the solution-cast thin films without annealing, which exhibit the isotropic homogeneous molecular orientation, mono-domains with a homeotropic alignment were found in cotpp-7/11(5/5) after the thin films were annealed in the high-temperature columnar phase (phi '). similar to the nucleation process in polymer crystallization, transmission electron microscopic observations show that small mono-domains appear in the initial stage of annealing, where molecules form a uniaxial in-plane chain orientation. with increasing annealing time, the molecular orientation gradually became tilted with respect to the substrate surface, and finally, a uniaxial homeotropic molecular orientation was achieved after a prolonged annealing time. the lateral size of mono-domains was found to increase continuously with annealing time and grew into a circular shape, indicating an isotropic lateral growth scheme which implies a hexagonal molecular packing proved by the electron diffraction experiments.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000169782300008
公开日期	2010-11-04
内容类型	期刊论文
源URL	[http://202.98.16.49/handle/322003/20695]
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	Xie FC,Liu JP,Yan DH,et al. Formation of mesophase mono-domains and micro-structures in thin films of a series of copolyethers containing both odd-numbered methylene units[J]. chinese journal of polymer science,2001,19(4):391-397.
APA	Xie FC,Liu JP,Yan DH,He TB,Zheng RQ,&Chen EQ.(2001).Formation of mesophase mono-domains and micro-structures in thin films of a series of copolyethers containing both odd-numbered methylene units.chinese journal of polymer science,19(4),391-397.
MLA	Xie FC,et al."Formation of mesophase mono-domains and micro-structures in thin films of a series of copolyethers containing both odd-numbered methylene units".chinese journal of polymer science 19.4(2001):391-397.