DROPLET DEFORMATION IN POLYMER BLENDS DURING UNIAXIAL ELONGATIONAL FLOW - INFLUENCE OF VISCOSITY RATIO FOR LARGE CAPILLARY NUMBERS

被引：88

作者：

DELABY, I ^{[1
]}

ERNST, B ^{[1
]}

GERMAIN, Y ^{[1
]}

MULLER, R ^{[1
]}

机构：

[1] ELF ATOCHEM,CERDATO,F-27270 SERQUIGNY,FRANCE

来源：

JOURNAL OF RHEOLOGY | 1994年 / 38卷 / 06期

关键词：

D O I：

10.1122/1.550568

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The deformation in uniaxial elongational flow of dispersed droplets in immiscible molten polymer blends was studied for viscosity ratios 0.005 > p = η(drop)/η(matrix) > 13 and negligible interfacial tension, with an original method based on quenching elongated specimens. Although drop deformations (drop major axis over initial diameter) were in the range 1 ≤ λd ≤ 5, good overall agreement was found with the small deformation Newtonian theory, which predicts that the drop versus matrix deformation ranges from 5/3 to 0 when p increases from 0 to infinity. The theoretical prediction that for p lower than 1, the droplet should deform more than the faraway surrounding matrix, with a limiting ratio of 5/3 at vanishing droplet viscosity, was verified both experimentally and numerically with a finite element simulation. © 1985, The Society of Rheology. All rights reserved.

引用

页码：1705 / 1720

页数：16

共 26 条

[1] A COMPUTER-CONTROLLED 4-ROLL MILL FOR INVESTIGATIONS OF PARTICLE AND DROP DYNAMICS IN TWO-DIMENSIONAL LINEAR SHEAR FLOWS [J].