Concentrated Polymer Solutions are Different from Melts: Role of Entanglement Molecular Weight

被引：175

作者：

Huang, Qian ^{[1
]}

Mednova, Olga ^{[2
]}

Rasmussen, Henrik K. ^{[3
]}

Alvarez, Nicolas J. ^{[1
]}

Skov, Anne L. ^{[1
]}

Almdal, Kristoffer ^{[2
]}

Hassager, Ole ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Chem & Biochem Engn, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Dept Micro & Nanotechnol, DK-2800 Lyngby, Denmark

[3] Tech Univ Denmark, Dept Mech Engn, DK-2800 Lyngby, Denmark

来源：

MACROMOLECULES | 2013年 / 46卷 / 12期

关键词：

RELAXATION-TIME SPECTRA; ELONGATIONAL VISCOSITY; POLYSTYRENE MELTS; FLOW BEHAVIOR; UNIAXIAL ELONGATION; EXTENSIONAL FLOWS; MONODISPERSE; SHEAR; STRESS; POLYBUTADIENE;

D O I：

10.1021/ma4008434

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We compare viscoelastic properties of several polystyrene solutions and melts with the same number of entanglements. It is demonstrated that the modulus and time can be shifted such that the linear viscoelastic properties are identical provided the number of entanglements are identical. However the nonlinear properties in strong extensional flow are different with polymer solutions showing markedly stronger extensional hardening than the corresponding melts. While increased chain extensibility for solutions may provide part of the explanation, it is demonstrated that other mechanisms are needed for a full explanation for the differences between solutions and melts.

引用

页码：5026 / 5035

页数：10

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