Poly(epsilon-capralactone)/poly(ethylene oxide) diblock copolymer .2. Nonisothermal crystallization and melting behavior

	Poly(epsilon-capralactone)/poly(ethylene oxide) diblock copolymer .2. Nonisothermal crystallization and melting behavior
	Gan ZH ; Zhang J ; Jiang BZ
刊名	journal of applied polymer science
	1997
卷号	63 期号:13 页码:1793-1804
关键词	NON-ISOTHERMAL CRYSTALLIZATION KINETICS
ISSN号	0021-8995
通讯作者	gan zh
中文摘要	the nonisothermal crystallization behavior and melting process of the poly(epsilon-caprolactone) (pcl)/poly(ethylene oxide) (peg) diblock copolymer in which the weight fraction of the pcl block is 0.80 has been studied by using differential scanning calorimetry (dsc). only the pcl block is crystallizable, the peo block with 0.20 weight fraction cannot crystallize. the kinetics of the pcl/peo diblock copolymer under nonisothermal crystallization conditions has been analyzed by ozawa's equation. the experimental data shows no agreement with ozawa's theoretical predictions in the whole crystallization process, especially in the later stage. a parameter, kinetic crystallinity, is used to characterize the crystallizability of the pcl/peo diblock copolymer. the amorphous and microphase separating peo block has a great influence on the crystallization of the pcl block. it bonds chemically with the pcl block, reduces crystallization entropy, and provides nucleating sites for the pcl block crystallization. the existence of the peo block leads to the occurrence of the two melting peaks of the pcl/peo diblock copolymer during melting process after nonisothermal crystallization. the comparison of nonisothermal crystallization of the pcl/peo diblock copolymer, pcl/peo blend, and pcl and peo homopolymers has been made. it showed a lower crystallinity of the pcl/peo diblock copolymer than that of others and a faster crystallization rate of the pcl/peo diblock copolymer than that of the pcl homopolymer, but a slower crystallization rate than that of the pcl/peo blend. (c) 1997 john wiley & sons, inc.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2010-12-22 ; 2011-06-09
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/24395]
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	Gan ZH,Zhang J,Jiang BZ. Poly(epsilon-capralactone)/poly(ethylene oxide) diblock copolymer .2. Nonisothermal crystallization and melting behavior[J]. journal of applied polymer science,1997,63(13):1793-1804.
APA	Gan ZH,Zhang J,&Jiang BZ.(1997).Poly(epsilon-capralactone)/poly(ethylene oxide) diblock copolymer .2. Nonisothermal crystallization and melting behavior.journal of applied polymer science,63(13),1793-1804.
MLA	Gan ZH,et al."Poly(epsilon-capralactone)/poly(ethylene oxide) diblock copolymer .2. Nonisothermal crystallization and melting behavior".journal of applied polymer science 63.13(1997):1793-1804.