Dynamic viscoelastic properties of multi-arm star polystyrenes in the molten state

被引：0

作者：

Yamamoto, T ^{[1
]}

Ohta, Y ^{[1
]}

Takigawa, T ^{[1
]}

Masuda, T ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Sakyo Ku, Kyoto 6068501, Japan

来源：

JOURNAL OF THE SOCIETY OF RHEOLOGY JAPAN | 2001年 / 29卷 / 04期

关键词：

multi-arm star; dynamic viscoelasticity; long-time relaxation; viscosity enhancement;

D O I：

暂无

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Multi-arm star polystyrenes with various lengths and number of arms were synthesized, and their dynamic viscoelastic properties were investigated in the molten state. The master curves of the storage modulus for the multi-arm stars showed a shoulder at low frequencies. suggesting that a new mechanical relaxation exists at the long time scales after completion of entanglement relaxation. The enhancement of the zero-shear viscosity compared with the regular star polymers was also observed for the multi-arm star polymers.

引用

页码：211 / 214

页数：4

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