QUANTITATIVE-EVALUATION OF EXTRUDATE SWELL FROM VISCOELASTIC PROPERTIES OF POLYSTYRENE

被引：19

作者：

GUILLET, J

SERIAI, M

机构：

[1] Laboratoire de Rhéologie des Matières Plastiques, Faculté de Sciences et Techniques, Saint-Etienne Cédex 2, 42023, 23, rue du Docteur Paul Michelon

来源：

RHEOLOGICA ACTA | 1991年 / 30卷 / 06期

关键词：

EXTRUDATE SWELL; RELAXATION MODULUS; RUBBER-LIKE ELASTIC THEORY;

D O I：

10.1007/BF00444372

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A theory of extrudate swell for short, intermediate or long dies is presented. In our experiment, we consider that the swelling phenomenon is mainly due to the recoverable elongational strain induced by the converging flow at the die entrance, as well as by recoverable shear strain originating within the die. From these concepts, an equation has been derived for the quantitative prediction of extrudate swell from the elastic material properties such as the entrance pressure drop, the relaxation modulus and the recoverable shear strain. Excellent agreement is found between predicted and measured values of extrudate swell obtained on commercial polystyrene melt, using capillaries of length-to-diameter ratios ranging from 1 to 20 and in a wide range of shear rates.

引用

页码：540 / 548

页数：9

共 15 条

[1]

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

[2]

Bagley EB., 1970, J RHEOL, V14, P545, DOI [10.1122/1.549178, DOI 10.1122/1.549178]

[3]

Cogswell FN., 1981, POLYM MELT RHEOLOGY

[4]

Graessley W.W., 1970, T SOC RHEOL, V14, P519, DOI [10.1122/1.549177, DOI 10.1122/1.549177]

[5]

Han CD, 1976, RHEOLOGY POLYM PROCC

[6] EXTRUDATE SWELL FROM SLIT AND CAPILLARY DIES - EXPERIMENTAL AND THEORETICAL-STUDY [J].

HUANG, DC ;

WHITE, JL .

POLYMER ENGINEERING AND SCIENCE, 1979, 19 (09) :609-616

[7]

Lodge A.S., 1964, ELASTIC LIQUIDS

[8]

Mendelson R., 1971, J POLYM SCI C, V35, P177

[9]

Nakajima N, 1966, T SOC RHEOL, V10, DOI 10.1122/1.549048

[10]

Petrie C.J. S., 1979, ELONGATIONAL FLOWS

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