Effects of Alkali Treatment and Polyisocyanate Crosslinking on the Mechanical Properties of Kraft Fiber-Reinforced Unsaturated Polyester Composites

被引：0

作者：

Gao, Zhenhua ^{[1
]}

Di, Mingwei ^{[1
]}

Zhang, Xiaofeng ^{[1
]}

Zhang, Dawei ^{[1
]}

机构：

[1] Northeast Forestry Univ, Coll Mat Sci & Engn, Harbin 150040, Peoples R China

来源：

BIORESOURCES | 2014年 / 9卷 / 04期

关键词：

Wood-plastic composites; Kraft fiber; Unsaturated polyester; Alkali pre-treatment; Polyisocyanate; Crosslinking; Mechanical properties; WOOD-PLASTIC COMPOSITES; STRUCTURAL-CHANGES; COUPLING AGENT; CELLULOSE; CREEP; BEHAVIOR;

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

The effects of alkali treatment and polyisocyanate crosslinking on the mechanical properties of kraft fiber-reinforced UPE composites were investigated by means of tensile evaluation, SEM analysis, and XRD analysis. The results indicated that the alkali treatment decreased the tensile strength of the prepared composite before aging from 121 MPa to 97 MPa due to the decreased degree of crystallinity of the alkali-treated kraft fiber. Polyisocyanate crosslinking could apparently improve the mechanical properties and stability in terms of a 43% increase of non-aged tensile strength and 52% increase of hydrothermal-aged tensile strength compared with the controlled composite without crosslinking modification, which was attributable to the formation of strong chemical bonding between the interfaces of kraft fiber and polyester.

引用

页码：5906 / 5916

页数：11

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