Distinguishing linear from star-branched polystyrene solutions with Fourier-transform rheology

被引：56

作者：

Neidhöfer, T

Sioula, S

Hadjichristidis, N

Wilhelm, M

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Univ Athens, Dept Chem, GR-15771 Athens, Greece

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2004年 / 25卷 / 22期

关键词：

FT rheology; large amplitude oscillatory shear (LAOS); polystyrene; viscoelastic properties;

D O I：

10.1002/marc.200400295

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Fourier-Transform rheology (FT rheology) was used to study the influence of the degree of branching on the nonlinear relaxation behaviour of polystyrene solutions. The results were compared with those obtained under oscillatory shear and step-shear conditions. The different topologies could be distinguished using FT rheology where the other rheological measurements failed. Significant differences occurred under large amplitude oscillatory shear (LAOS) conditions as particularly reflected in the phase difference of the third harmonic, Phi(3), which could be related to strain-softening and strain-hardening behaviour. Currently, this work is extended towards different topologies in polyolefins (e.g. long chain branched).

引用

页码：1921 / 1926

页数：6

共 44 条

[1]

[Anonymous], 2001, APPL RHEOL

[2]

[Anonymous], RHEOLOGICAL MEASUREM

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