A SIMPLE-MODEL TO PREDICT EXTRUDATE SWELL OF POLYSTYRENE AND LINEAR POLYETHYLENES

被引：10

作者：

SERIAI, M ^{[1
]}

GUILLET, J ^{[1
]}

CARROT, C ^{[1
]}

机构：

[1] UNIV JEAN MONNET ST ETIENNE, FAC SCI & TECHNIQUES, RHEOL MAT PLAST LAB, F-42023 ST ETIENNE 2, FRANCE

来源：

RHEOLOGICA ACTA | 1993年 / 32卷 / 06期

关键词：

EXTRUDATE SWELL; MODEL-POLYSTYRENE; POLYETHYLENE;

D O I：

10.1007/BF00369069

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In a previous paper (Guillet and Seriai, 1991) we derived a simple analytical expression which allows the prediction of extrudate swell of polystyrene in a wide range of residence time. This was done using the rubberlike elasticity theory and calculation of the elongational strain recovery of a Lodge fluid. The theoretical extrudate swell ratio mainly depends on the relaxation modulus, the extension ratio and the recoverable shear strain. The main advantage of this model is to provide good accuracy with short dies in a wide range of shear rate. In this paper, we examine the validity of the proposed equation with different contraction ratios at the die entrance (ECR) and its ability to predict extrudate swell of other commodity polymers such as polyethylenes.

引用

页码：532 / 538

页数：7

共 19 条

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[2]

Bagley E.B., 1963, J APPL POLYM SCI, V7, P1661, DOI DOI 10.1002/APP.1963.070070508

[3] A STUDY OF STRESS RELAXATION WITH FINITE STRAIN [J].