MODELING OF THE COOLING OF SEMICRYSTALLINE POLYMERS DURING THEIR PROCESSING

被引:26
作者
BILLON, N [1 ]
BARQ, P [1 ]
HAUDIN, JM [1 ]
机构
[1] ECOLE NATL SUPER MINES,SOPHIA ANTIPOLIS,CTR MISE FORME MAT,F-06565 VALBONNE,FRANCE
关键词
D O I
10.3139/217.910348
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
As a first step for the modelling of the processing of semicrystalline polymers, it is proposed a new overall kinetic model which allows to calculate the evolution of the transformed volume fraction whatever the cooling conditions are. This model derives from initial Avrami-Evans' theory. The transformed volume fraction is calculated as a function of parameters which are measured during crystallizations at a constant cooling rate. This model is easy to use and can be introduced into a more complete thermomechanical calculation. For this purpose we propose to express the energy equation in terms of the enthalpy function. Two applications of our model are presented: the cooling of a polymer sheet (non-flowing polymer) and the cooling of the film on the chill-roll during the cast film extrusion process (flowing polymer).
引用
收藏
页码:348 / 355
页数:8
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