MAPPING THE DAMAGED ZONE AROUND THE CRACK TIP IN HIGH DENSITY POLYETHYLENE WITH SYNCHROTRON MICROFOCUS SMALL ANGLE X-RAY SCATTERING TECHNIQUE  

作　　者：Hans-Friedrich Enderle Dieter Lilge Stephan V.Roth Rainer Gehrke Jens Rieger 门永锋 

机构地区：[1]Basell Polyolefine GmbH,R&D,65926 Frankfurt,Germany [2]HASYLAB am DESY,Notkestr.85,22607 Hamburg,Germany [3]BASF SE,Polymer Research,67056 Ludwigshafen,Germany [4]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences

出　　处：《Chinese Journal of Polymer Science》2010年第2期165-170,共6页高分子科学（英文版）

基　　金：supported by the"Hundred Talents Project"of the Chinese Academy of Sciences,the National Basic Research Program of China(No.2005CB623800);National Natural Science Foundation of China(Nos.50603024, 50621302) and HASYLAB projectⅡ-20052011

摘　　要：The structural changes around a crack tip in a high density polyethylene were investigated by means of scanning synchrotron microfocus small-angle X-ray scattering technique. The scattering data confirm the process of craze structure development near a crack tip based on the evolution of voids. In addition, it was found that the main stress in the plastic zone near a crack tip exhibited a gradient distribution with respect to its strength and direction. The whole damaged area showed a strain distribution indicating a flow behavior toward the crack tip.The structural changes around a crack tip in a high density polyethylene were investigated by means of scanning synchrotron microfocus small-angle X-ray scattering technique. The scattering data confirm the process of craze structure development near a crack tip based on the evolution of voids. In addition, it was found that the main stress in the plastic zone near a crack tip exhibited a gradient distribution with respect to its strength and direction. The whole damaged area showed a strain distribution indicating a flow behavior toward the crack tip.

关 键 词：High density polyethylene Microfocus SAXS Crack tip Voids. 

分 类 号：O631.3[理学—高分子化学]