Crystallization-driven migration of the low surface energy segment of a copolymer to the bulk

doi:10.1016/j.polymer.2006.02.076

CORC > 化学研究所 > 中国科学院化学研究所

	Crystallization-driven migration of the low surface energy segment of a copolymer to the bulk
	Cheung, ZL ; Ng, KM ; Weng, LT ; Chan, CM ; Li, L
刊名	POLYMER
	2006-04-19
卷号	47 期号:9 页码:3164-3170
关键词	Crystallization Copolymer Surface Segregation
ISSN号	0032-3861
DOI	10.1016/j.polymer.2006.02.076
英文摘要	[(BA-C8)(18)-(6FBA)](n) was synthesized by condensation polymerization of poly(bisphenol A-co-octane) containing 18 repeat units with bromine end groups, (Br-(BA-C8)(18)-Br), and 4,4'- (hexafluoroisopropylidene)diphenol (6FBA). This copolymer was confirmed to be semicrystalline after a single melting temperature was detected by differential scanning calorimetry. The changes in the surface chemical composition were measured using time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy, the changes in the surface energy were measured using contact angle measurements, and the changes in the surface morphology were detected using atomic force microscopy as the copolymer crystallized. A decrease in the surface fluorine concentration with time was detected because of the movement of the low surface energy units (6FBA) to the bulk during the development of the crystalline phase. This result shows that the decrease in the enthalpy as a result of crystallization overcomes the increase in the surface free energy due to the migration of the low surface energy units to the bulk and the decrease in entropy due to demixing. (c) 2006 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000237773600029
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/58969]
专题	中国科学院化学研究所
通讯作者	Chan, CM
作者单位	1.Hong Kong Univ Sci & Technol, Sch Engn, Dept Chem Engn, Hong Kong, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Adv Engn Mat Facil, Hong Kong, Hong Kong, Peoples R China 3.Hong Kong Univ Sci & Technol, Mat Characterizat & Preparat Facil, Hong Kong, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Cheung, ZL,Ng, KM,Weng, LT,et al. Crystallization-driven migration of the low surface energy segment of a copolymer to the bulk[J]. POLYMER,2006,47(9):3164-3170.
APA	Cheung, ZL,Ng, KM,Weng, LT,Chan, CM,&Li, L.(2006).Crystallization-driven migration of the low surface energy segment of a copolymer to the bulk.POLYMER,47(9),3164-3170.
MLA	Cheung, ZL,et al."Crystallization-driven migration of the low surface energy segment of a copolymer to the bulk".POLYMER 47.9(2006):3164-3170.