Viscoelastic properties of poly(L-lactic acid)

被引：2

作者：

Murakami, H ^{[1
]}

Araki, O ^{[1
]}

Masuda, T ^{[1
]}

机构：

[1] Kyoto Univ, Dept Chem Mat, Kyoto 6068501, Japan

来源：

NIHON REOROJI GAKKAISHI | 2000年 / 28卷 / 04期

关键词：

poly(L-lactic acid); dynamic viscoelastic properties; biodegradable polymer;

D O I：

10.1678/rheology.28.193

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The dynamic viscoelastic properties of poly(L-lactic acid) (PLLA) were investigated in the molten state. The time-temperature superposition principle can be utilized and the master curves were obtained. The temperature dependence of the shift factor was expressed by the WLF equation. The fractional free volume at the glass transition temperature, the temperature coefficient of the fractional free volume, and the Vogel temperature were determined. These values are smaller than those of poly(methyl methacrylate) and polystyrene. Moreover the characteristic parameters; zero-shear viscosity, steady-state compliance, and elasticity coefficient were evaluated at 180 degreesC as a reference temperature.

引用

页码：193 / 195

页数：3

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[No title captured]

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