Effect of multiple branch points on non-linear rheology

被引：0

作者：

Kirkwood, Keith M. ^{[1
]}

Vlassopoulos, Dimitris ^{[2
,3
]}

Leal, L. Gary ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

[2] FORTH, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece

[3] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Crete, Greece

来源：

XVTH INTERNATIONAL CONGRESS ON RHEOLOGY - THE SOCIETY OF RHEOLOGY 80TH ANNUAL MEETING, PTS 1 AND 2 | 2008年 / 1027卷

关键词：

stress relaxation; non-linear rheology; comb polymer; polyisoprene; step shear;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Stress relaxation behavior after a large step strain is reported for a polyisoprene comb with lightly entangled arms. The linear viscoelastic behavior of the comb 2 is fit with the theoretical model of Kapnistos et al[1] using characteristic values for the given chemistry and p(2)=1/12. Using time-temperature superposition, stress relaxation mastercurves are reported that span the complete relaxation behavior of the comb, from branch to long time backbone behavior. The backbone of the comb is well entangled after relaxation of the branches, but does not exhibit damping behavior consistent with an entangled linear chain showing a change due to the presence of the branch points.

引用

页码：421 / +

页数：2

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