Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene

doi:10.1016/j.polymer.2018.01.076

CORC > 化学研究所 > 中国科学院化学研究所

	Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene
	Lu, Ying 1; Lyu, Dong 1,2; Xiong, Bijin 1; Chen, Ran 1; Men, Yongfeng 1,2
刊名	POLYMER
	2018-02-28
卷号	138 页码:387-395
关键词	Cavitation Polypropylene Mesophase Alpha Phase Saxs And Waxs
ISSN号	0032-3861
DOI	10.1016/j.polymer.2018.01.076
英文摘要	Isotactic polypropylene (iPP) samples with pure mesophase, pure alpha modification, and coexistence of both phases were used to investigate the sudden stress whitening triggered at large strain during stretching. This whitening was caused by the cavities generated in the highly oriented amorphous network. The critical stresses of such cavitation-induced whitening were found to depend on the crystalline morphology before stretching. Below the phase transition temperature of mesophase to alpha phase, iPP sample with mesophase presented the highest critical stress of cavitation-induced whitening at large strain upon stretching while the one with alpha crystallites gave the smallest critical stress value. iPP sample with coexistence of both phases showed an intermediate critical stress of cavitation-induced whitening. However, these critical stresses of cavitation-induced whitening in the iPP samples, which experienced the mesophase to alpha phase transition before stretching, started to decrease under deformation above the corresponding phase transition temperature. This peculiar evolution of the critical stress for initiating cavitation-induced whitening in iPP samples at large strain could be understood by the change of number of load bearing inter-fibrillar tie chains within the highly oriented inter-fibrillar amorphous network at different conditions. (C) 2018 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000426264300043
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/45691]
专题	中国科学院化学研究所
通讯作者	Men, Yongfeng
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Renmin St 5625, Changchun 130022, Jilin, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Lu, Ying,Lyu, Dong,Xiong, Bijin,et al. Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene[J]. POLYMER,2018,138:387-395.
APA	Lu, Ying,Lyu, Dong,Xiong, Bijin,Chen, Ran,&Men, Yongfeng.(2018).Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene.POLYMER,138,387-395.
MLA	Lu, Ying,et al."Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene".POLYMER 138(2018):387-395.