In situ characterization by small angle light scattering of the shear-induced coalescence mechanisms in immiscible polymer blends

被引:37
作者
Rusu, D [1 ]
Peuvrel-Disdier, E [1 ]
机构
[1] Ecole Mines, Ctr Mise Forme Mat, UMR 7635, CNRS, F-06904 Sophia Antipolis, France
关键词
D O I
10.1122/1.551051
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
This work presents an in situ experimental investigation of the shear-induced coalescence mechanism in low concentration polymer blends (1%-10%). An original sizing method based on small-angle light scattering and optical microscopy were used to determine the evolution of the drop size distributions as a function of time. In order to study the pure coalescence mechanisms, measurements were conducted according to a specific flow protocol. The influences of the shear rate, initial morphology, concentration of the polymer blend and phase inversion on the coalescence kinetics were investigated. The investigated. blends are mixtures of polydimethylsiloxane and polyisobutene. The amount of Strain, the step-down rate ratio and the concentration squared are identified as relevant parameters to describe the coalescence kinetics. The dependence of the steady state drop sizes on the applied shear rate is well described by a coalescence model considering partially mobile interfaces. (C) 1999 The Society of Rheology. [S0148-6055(99)01806-4].
引用
收藏
页码:1391 / 1409
页数:19
相关论文
共 37 条
[11]   Three-dimensional shape of a drop under simple shear flow [J].
Guido, S ;
Villone, M .
JOURNAL OF RHEOLOGY, 1998, 42 (02) :395-415
[12]   Binary collision of drops in simple shear flow by computer-assisted video optical microscopy [J].
Guido, S ;
Simeone, M .
JOURNAL OF FLUID MECHANICS, 1998, 357 :1-20
[13]  
Han C., 1981, Multiphase Flow in Polymer Processing
[14]   DEVELOPMENT OF POLYMER BLEND MORPHOLOGY DURING COMPOUNDING IN A TWIN-SCREW EXTRUDER .4. A NEW COMPUTATIONAL MODEL WITH COALESCENCE [J].
HUNEAULT, MA ;
SHI, ZH ;
UTRACKI, LA .
POLYMER ENGINEERING AND SCIENCE, 1995, 35 (01) :115-127
[15]  
Janssen J. M. H., 1993, THESIS EINDHOVEN U T
[16]  
LYNGAAEJORGENSEN J, 1993, POLYM NETWORK BLEND, V3, P167
[17]   Effect of shear history on the morphology of immiscible polymer blends [J].
Minale, M ;
Moldenaers, P ;
Mewis, J .
MACROMOLECULES, 1997, 30 (18) :5470-5475
[18]  
RITI JB, 1994, SYNTH POLYM J, V1, P1
[19]  
RITI JB, 1996, THESIS ECOLE MINES P
[20]  
ROSATI D, 1998, THESIS U NICE SOPHIA