文献类型：期刊文献

英文题名：Structural Interpretation of Eyring Activation Parameters for Tensile Yielding Behavior of Isotactic Polypropylene Solids

作者：Gao, Rui[1,2];Kuriyagawa, Mizue[2];Nitta, Koh-Hei[2];He, Xuelian[1];Liu, Boping[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Kanazawa Univ, Grad Sch Nat Sci & Technol, Div Mat Sci, Kanazawa, Ishikawa 9201192, Japan

年份：2015

卷号：54

期号：10

起止页码：1196

外文期刊名：JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS

收录：;EI(收录号：20154001324938);WOS:【SCI-EXPANDED(收录号:WOS:000362348000004)】；

语种：英文

外文关键词：activation volume; activation energy; Eyring theory; isotactic polypropylene; tensile behavior; yield stress

摘要：The temperature and strain rate dependence of the stress-strain curves of isotactic polypropylene were analyzed on the basis of Eyring kinetic theory. The molecular and structural basis underlying the parameters, such as activation volume and activation energy, used by the Eyring analysis were studied using the lamellar cluster theory, where a stacked lamella acts as a basic structural unit under yielding and necking deformation. It was suggested that, at lower temperatures, the activation volume corresponds to chain slippage within crystalline lamellae in the lamellar clusters whereas at higher temperature the increase in activation volume results in intralamellar slip corresponding to the alpha(2) relaxation.