Structural Evolution of Ethylene-Octene Copolymers upon Stretching and Unloading

	Structural Evolution of Ethylene-Octene Copolymers upon Stretching and Unloading
	Sun, YY; Fu, LL; 吴忠华;Wu, ZH; Men, YF
刊名	MACROMOLECULES
	2013
卷号	46 期号:3 页码:971-976
英文摘要	Structural evolution of two ethylene-octene copolymers with different octene content during tensile deformation and recovery was investigated using the in-situ synchrotron small-angle X-ray scattering technique. Sample containing 4 mol % octene shows similar deformation mechanism as observed previously that the whole process of deformation can be regarded as a stretching of two interpenetrating networks of crystalline rigid network and entangled amorphous phase. A transition from a crystalline rigid network dominating behavior at small deformations to a stretching-induced crystalline block disaggregation-recrystallization process occurs at a critical strain where stress generated by the stretched amorphous network reaches a critical value leading to the destruction of crystalline blocks. In sample containing 8 mol % octene, this critical strain is much larger than observed in the other sample. Such a phenomenon is attributed to the fact that only crystalline lamellar stacks and bundle-like crystals with much weakened coupling can be developed in the sample. The weakened coupling between crystalline lamellar stacks is due to the existence of interstack amorphous phase which also leads to an inhomogeneous strain distribution in the system.
学科主题	Polymer Science
收录类别	SCI
WOS记录号	WOS:000315018400045
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224088]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Sun, YY,Fu, LL,吴忠华；Wu, ZH,et al. Structural Evolution of Ethylene-Octene Copolymers upon Stretching and Unloading[J]. MACROMOLECULES,2013,46(3):971-976.
APA	Sun, YY,Fu, LL,吴忠华；Wu, ZH,&Men, YF.(2013).Structural Evolution of Ethylene-Octene Copolymers upon Stretching and Unloading.MACROMOLECULES,46(3),971-976.
MLA	Sun, YY,et al."Structural Evolution of Ethylene-Octene Copolymers upon Stretching and Unloading".MACROMOLECULES 46.3(2013):971-976.