Tensile Deformation of Oriented Poly(epsilon-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether)

doi:10.1021/ma401052x

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	Tensile Deformation of Oriented Poly(epsilon-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether)
	Jiang, Zhiyong 1; Wang, Yaotao 1; Fu, Lianlian 1; Whiteside, Ben 2; Wyborn, John 2; Norris, Keith 2; Wu, Zhonghua 3; Coates, Phil 2; Men, Yongfeng 1
刊名	MACROMOLECULES
	2013-09-10
卷号	46 期号:17 页码:6981-6990
ISSN号	0024-9297
DOI	10.1021/ma401052x
英文摘要	The structural evolution of micromolded poly(e-caprolactone) (PCL) and its miscible blends with noncrystallizable poly(vinyl methyl ether) (PVME) at the nanoscale was investigated as a function of deformation ratio and blend composition using in situ synchrotron small-angle X-ray scattering (SAXS) and scanning SAXS techniques. It was found that the deformation mechanism of the oriented samples shows a general scheme for the process of tensile deformation: crystal block slips within the lamellae occur at small deformations followed by a stress-induced fragmentation and recrystallization process along the drawing direction at a critical strain where the average thickness of the crystalline lamellae remains essentially constant during stretching. The value of the critical strain depends on the amount of the amorphous component incorporated in the blends, which could be traced back to the lower modulus of the entangled amorphous phase and, therefore, the reduced network stress acting on the crystallites upon addition of PVME. When stretching beyond the critical strain the slippage of the fibrils (stacks of newly formed lamellae) past each other takes place resulting in a relaxation of stretched interlamellar amorphous chains. Because of deformation-induced introduction of the amorphous PVME into the interfibrillar regions in the highly oriented blends, the interactions between fibrils becomes stronger upon further deformation and thus impeding sliding of the fibrils to some extent leading finally to less contraction of the interlamellar amorphous layers compared to the pure PCL.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000330145900032
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/46339]
专题	中国科学院化学研究所
通讯作者	Jiang, Zhiyong
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Bradford, Sch Engn, Bradford BD7 1DP, W Yorkshire, England 3.Chinese Acad Sci, Inst High Energy Phys, BSRF, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Zhiyong,Wang, Yaotao,Fu, Lianlian,et al. Tensile Deformation of Oriented Poly(epsilon-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether)[J]. MACROMOLECULES,2013,46(17):6981-6990.
APA	Jiang, Zhiyong.,Wang, Yaotao.,Fu, Lianlian.,Whiteside, Ben.,Wyborn, John.,...&Men, Yongfeng.(2013).Tensile Deformation of Oriented Poly(epsilon-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether).MACROMOLECULES,46(17),6981-6990.
MLA	Jiang, Zhiyong,et al."Tensile Deformation of Oriented Poly(epsilon-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether)".MACROMOLECULES 46.17(2013):6981-6990.