Investigation on isothermal and non-isothermal crystallization kinetics of poly (epsilon-caprolactone)

CORC > 化学研究所 > 中国科学院化学研究所

	Investigation on isothermal and non-isothermal crystallization kinetics of poly (epsilon-caprolactone)
	Meng Yan-Feng ; Wen Hui-Ying ; Li Hong-Fei ; Tang Yu-Jing ; Men Yong-Feng ; Jiang Shi-Chun ; An Li-Jia
刊名	CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
	2006-11-10
卷号	27 期号:11 页码:2198-2203
关键词	Poly(Epsilon-caprolactone) Isothermal And nonIsothermal Crystallization Kinetics Lamellar Structure
ISSN号	0251-0790
英文摘要	The crystallization kinetics and the development of lamellar structure during the isothermal crystallization of poly (epsilon-caprolactone) (PCL) were investigated by means of differential scanning calorimetry (DSC) and real-time synchrotron small angle X-ray scattering (SR-SAXS) techniques, respectively. The Avrami analysis was performed to obtain the kinetics parameters. The value of Avrami index, n, is about 3, demonstrating a three-dimensional spherulitic growth on heterogeneous nuclei in the process of isothermal crystallization. The activation energy and the surface free energy of chain folding for isothermal crystallization were determined according to the Arrhenius equation and Hoffman-Lauritzen theory, respectively. In the process of nonisothermal crystallization of PCL, the value of Avrami index, n, is about 4, which demonstrates a three-dimensional spherulitic growth on homogeneous nuclei. In addition, lamellar parameters were obtained from the analysis of SR-SAXS data. The results indicate that long period and the thickness of amorphous layer first decrease and then keep constant with the increase of the crystallization time. At the same time, the long period increases with increasing the crystallization temperature, which is the same as the thickness of amorphous and crystalline layers.
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000242182500050
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/59491]
专题	中国科学院化学研究所
通讯作者	Jiang Shi-Chun
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Ludong Univ, Sch Chem & Mat, Yantai 264025, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Meng Yan-Feng,Wen Hui-Ying,Li Hong-Fei,et al. Investigation on isothermal and non-isothermal crystallization kinetics of poly (epsilon-caprolactone)[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2006,27(11):2198-2203.
APA	Meng Yan-Feng.,Wen Hui-Ying.,Li Hong-Fei.,Tang Yu-Jing.,Men Yong-Feng.,...&An Li-Jia.(2006).Investigation on isothermal and non-isothermal crystallization kinetics of poly (epsilon-caprolactone).CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,27(11),2198-2203.
MLA	Meng Yan-Feng,et al."Investigation on isothermal and non-isothermal crystallization kinetics of poly (epsilon-caprolactone)".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 27.11(2006):2198-2203.