Influence of tacticity and molecular weight of poly(vinyl alcohol) on crystallization and biodegradation of poly(3-hydroxybutyric acid)/poly(vinyl alcohol) blend films

被引：39

作者：

Ikejima, T ^{[1
]}

Yoshie, N ^{[1
]}

Inoue, Y ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Biomol Engn, Midori Ku, Yokohama, Kanagawa 2268501, Japan

来源：

POLYMER DEGRADATION AND STABILITY | 1999年 / 66卷 / 02期

关键词：

D O I：

10.1016/S0141-3910(99)00076-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

The crystallinity and the profile of biodegradation by environmental microorganisms in river water were investigated for bacterial poly(3-hydroxybutyric acid) [PHB] blend films with stereoregular poly(vinyl alcohol)s [PVA] and low-molecular weight atactic PVAs. According to the DSC thermal analysis, the crystallization of PHB was found to be not suppressed by blending with highly isotactic PVA. This result is consistent with previous results obtained by using Fourier-transformed infrared spectroscopy, that is, PVA sample with higher syndiotacticity brings about higher suppression of crystallization of PHB. In the PHB/PVA blend system, the formation of small PHB crystals was found by wide angle X-ray scattering, even in the samples for which the melting endotherm of PHB was not detected by DSC. The biodegradation profile of these blend films depends strongly on the water solubility of the PVA component. The PHB blends with low-molecular weight atactic PVA, which shows higher water solubility than atactic PVA with higher molecular weight and stereoregular PVA, exhibited faster degradation compared to the PHB blends with high-molecular weight atactic PVA system. The biodegradability of the PHB blends with stereoregular PVA became extremely low, when the PVA composition in the blends became high. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：263 / 270

页数：8

共 26 条

[1]

Enzymatic and environmental degradation of racemic poly(3-hydroxybutyric acid)s with different stereoregularities [J].