Numerical investigation of viscoelastic flow induced crystallization in polymer processing

Mu, Yue; Zhao, Guoqun; Wu, Xianghong; Dong, Guiwei
May 2013
AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p931
Academic Journal
The investigation of viscoelastic flow induced crystallization is of great engineering significance in polymer processing like extrusion, injection and blow molding. In the study, the behavior of viscoelastic flow induced crystallization of semi-crystalline polymers is investigated by using finite element-finite difference method. The Schneider's approach is introduced to describe the evolution of crystallization kinetic process. The numerical model of three-dimensional flow induced crystallization of polymer melts obeying Phan-Thien and Tanner constitutive model is established. A penalty method is introduced to solve the nonlinear governing equations with a decoupled algorithm. The effect of flow state on the crystallization behavior is investigated. The crystalline distribution within the flow channel is obtained based on the proposed mathematical model and numerical method.


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