NON-NEWTONIAN AND NONISOTHERMAL ANALYSIS OF FLOW DURING POLYMERIZATION OF METHYL-METHACRYLATE IN A MODEL TWIN-SCREW EXTRUDER .2.

被引：5
作者：
CHU, LL
MIN, K
机构：
[1] Institute of Polymer Engineering, University of Akron, Akron, Ohio
来源：
POLYMER ENGINEERING AND SCIENCE | 1994年 / 34卷 / 12期
关键词：
Extruders - Flow of fluids - Mathematical models - Molecular weight - Monomers - Non Newtonian flow - Numerical analysis - Polymerization - Pressure measurement - Thermal effects - Velocity - Viscosity;
D O I：
10.1002/pen.760341208
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The flow analysis network (FAN) method was modified to analyze the flow during polymerization of methyl methacrylate (MMA) in a model counter-rotating nonintermeshing screw extruder. The shear viscosity of the reactive mixture in the twin screw extruder was considered as a mixture of polymer and monomer. Thus, the reaction viscosity of the mixture of polymer and monomer was taken to be an explicit function dependent on the shear rate, temperature, conversion, and molecular weight. A new flow path method was developed to calculate the residence time distribution, which related to the degree of conversion. The numerical prediction of the velocity, temperature, viscosity, and pressure profiles during reaction in the model twin screw extruder is described.
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页码：995 / 1004
页数：10
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