聚合物熔体粘弹性本构方程

VISCOELASTIC CONSTITUTIVE EQUATIONS OF POLYMER MELTS

概述了聚合物熔体粘弹性本构方程的发展历程 ,给出了有代表性的线性粘弹性和非线性粘弹性本构方程的各种形式的数学表达式 ,讨论了它们的特点及应用范围 。

The development history of VCE was reviewed. The viscoelastic constitutive equation(VCE) during numerical simulation of polymer melt flow was presented. The typical linear and non linear VCEs were expressed mathermatically in various forms. Then their features and application situations were discussed. It indicates that the applications of the non linear VCEs have more attentions than linear VECs. Among the non linear, the PTT model is the one in used often. That how to put forward the VCE via the molecular theory is a hot topic of rheology recently.