Deformation-mediated superstructures and cavitation of poly (L-lactide): In-situ small-angle X-ray scattering study

doi:10.1016/j.polymer.2011.12.002

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	Deformation-mediated superstructures and cavitation of poly (L-lactide): In-situ small-angle X-ray scattering study
	Zhang, Xiugin 1,3; Schneider, Konrad 2; Liu, Guoming 1; Chen, Jianhong 2; Bruening, Karsten 2; Wang, Dujin 1; Stamm, Manfred 2
刊名	POLYMER
	2012-01-24
卷号	53 期号:2 页码:648-656
关键词	Poly (L-lactide) (Pla) Stretching Structure Evolution
ISSN号	0032-3861
DOI	10.1016/j.polymer.2011.12.002
英文摘要	Cavitation and superstructure evolution of polymers during stretching play crucial roles to influence the mechanical properties of materials. In this study, we investigated deformation-mediated superstructures and cavitation of poly (L-lactide) (PLA) as well as their dependence on stretching temperatures by in-situ small-angle X-ray (SAXS) analysis coupled with mechanical testing. It is found that the cavitation and crystalline deformation are strongly influenced by stretching stress during deformation, which significantly depends on the stretching temperature. At lower stretching temperature (70 degrees C), the cavitation is initiated before the yielding and then stimulates the crystallite shearing. At higher stretching temperature (90 degrees C), however, the crystallites shear firstly and then crystalline deformation promotes the formation of cavities orientated along the stretching direction. High stretching temperature benefits the formation of relatively perfect crystals with high orientation. The results provide the basic knowledge of how to adjust the mechanical properties of polymer materials by controlling their superstructure in the deformation process. (C) 2011 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000299607400045
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/49169]
专题	中国科学院化学研究所
通讯作者	Wang, Dujin
作者单位	1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China 2.Leibniz Inst Polymer Res Dresden, D-01069 Dresden, Germany 3.Beijing Inst Fash Technol, Dept Mat Sci & Engn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiugin,Schneider, Konrad,Liu, Guoming,et al. Deformation-mediated superstructures and cavitation of poly (L-lactide): In-situ small-angle X-ray scattering study[J]. POLYMER,2012,53(2):648-656.
APA	Zhang, Xiugin.,Schneider, Konrad.,Liu, Guoming.,Chen, Jianhong.,Bruening, Karsten.,...&Stamm, Manfred.(2012).Deformation-mediated superstructures and cavitation of poly (L-lactide): In-situ small-angle X-ray scattering study.POLYMER,53(2),648-656.
MLA	Zhang, Xiugin,et al."Deformation-mediated superstructures and cavitation of poly (L-lactide): In-situ small-angle X-ray scattering study".POLYMER 53.2(2012):648-656.