Kraft lignin/poly(ethylene oxide) blends: Effect of lignin structure on miscibility and hydrogen bonding

被引：125

作者：

Kubo, S ^{[1
]}

Kadla, JF ^{[1
]}

机构：

[1] Univ British Columbia, Dept Wood Sci, Vancouver, BC V6T 1Z4, Canada

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2005年 / 98卷 / 03期

关键词：

biopolymers; blends; differential scanning calorimetry (DSC); infrared spectroscopy; miscibility;

D O I：

10.1002/app.22245

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Blends of poly(ethylene oxide) (PEO) with softwood kraft lignin (SKL) were prepared by thermal blending. The miscibility behavior and hydrogen bonding of the blends were investigated by differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. The experimental results indicate that PEO was miscible with SKL, as shown by the existence of a single glass-transition temperature over the entire composition range by DSC. In addition, a negative polymer-polymer interaction energy density was calculated on the basis of the melting point depression of PEO. The formation of strong intermolecular hydrogen bonding was detected by FTIR analysis. A comparison of the results obtained for the SKL/PEO blend system with those previously observed for a hardwood kraft lignin/PEO system revealed the existence of stronger hydrogen bonding within the SKL/PEO blends but weaker overall intermolecular interactions between components; this suggested that more than just hydrogen bonding was involved in the determination of the blend behavior in the kraft lignin/PEO blends. (c) 2005 Wiley Periodicals, Inc.

引用

页码：1437 / 1444

页数：8

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