Nonlinear rheology of hyperbranched polyisobutylene

被引：32
|
作者：
Robertson, CG
Roland, CM
Puskas, JE
机构：
[1] USN, Res Lab, Div Chem, Washington, DC 20375 USA
[2] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada
来源：
JOURNAL OF RHEOLOGY | 2002年 / 46卷 / 01期
关键词：
D O I：
10.1122/1.1428318
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The nonlinear shear theology of a hyperbranched polyisobutylene (PIB) with narrow molecular weight distribution (M-w/M-n = 1.3) was compared to that of a polydisperse (M-w/M-n = 2.5) linear PIB. After adjusting the respective measurement temperatures to yield equal shear viscosities, the theology was found to be quite similar for the two polymers, notwithstanding their markedly different structures. These similarities persisted in capillary extrusion experiments at moderate shear rates, on the compounds reinforced with carbon black, However, at higher shear rates, the linear PIB exhibits a greater elastic response, with consequently larger extrudate swell. (C) 2002 The Society of Rheology.
引用
收藏
页码：307 / 320
页数：14
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