COMPOSITION AND RHEOLOGY OF POLYAMIDE-6 OBTAINED BY USING BI-AND TRI-FUNCTIONAL COUPLING AGENTS

查看全文 作　　者：J.J.M. [1,2]Slot;E. van [1]Ruymbeke;P.A.M. [1]Steeman

机构地区：[1]Materials Science Centre,DSM Research;[2]Department of Mathematics and Computer Science,Eindhoven University of Technology

出　　处：《Chinese Journal of Polymer Science》索引2013年第31卷第1期,共13页

摘　　要：A statistical approach is developed, based on a Monte Carlo method, in order to determine the statistical composition of a polyamide-6 sample composed of caprolactam (an AB-type monomer) and of a di-acid (A2 type) or a tri-acid (A3 type) as coupling agents. For this composition, the linear rheological behavior of these systems is predicted using a tube-based theory. This allows us to show that while coupling agents of type A2 can be seen as flow improver, the effect of branching agents of type A3 , depending on the synthesis recipe and the conversion level, can lead either to an increase or to a decrease of the viscosity. By adding specific amount of these agents, we also show that it is possible to obtain materials with the same zero-shear viscosity but with different shear thinning behavior. Furthermore, the polydispersity of linear samples of the same average number molecular weight, M n , is discussed in function of the amount of A2 monomers they contain. Ranging from 2 to 1.5, this difference in polydispersity is expected to have a significant influence on the processing behavior of such materials. 关键词：聚酰胺6 偶联剂组成零剪切粘度 BI 流变行为预测流动性改进剂

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COMPOSITION AND RHEOLOGY OF POLYAMIDE-6 OBTAINED BY USING BI-AND TRI-FUNCTIONAL COUPLING AGENTS

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