摘要
采用在水相中进行木粉表面接枝聚甲基丙烯酸甲酯(PMMA)的方法对木粉进行改性,通过红外光谱法分析了改性木粉表面结构的变化并讨论了接枝反应机理。制备了改性木粉/PVC复合材料,并进行了力学性能的测试。结果显示,通过水相接枝PMMA的方法,木粉表面的部分羟基被PMMA链取代。改性木粉/PVC复合材料的拉伸强度和冲击强度均高于未改性木粉体系。扫描电子显微镜(SEM)显示了改性木粉与PVC基体间的界面粘结较紧。实验证明了表面接枝PMMA的方法有效的改善了木粉和PVC基体之间的相容性。
The method that wood fiber was modified by grafting PMMA in water phase was investigated. The structur- al change in surface of wood was confirmed by infrared spectrum technique and the grafting reaction mechanism was discussed. The modified wood flour/PVC composites were prepared and their mechanical properties were measured. The result showed that the partial hydroxyl groups of surface were substituted by PMMA chain. The tensile and impact strength of composite were improved by the modified wood-flour. Under a scanning electron microscope （SEM）, it was observed that the interface between modified wood flour and PVC matrix was closely bond. The experiment proved that the method of grafting PMMA effectively improved the compatibility between a wood-flour and PVC matrix.
出处
《长春理工大学学报（自然科学版）》
2012年第2期151-153,共3页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
吉林省教育厅"十一五"科学技术研究项目[吉教科合字(2010)第302号]
关键词
木粉
聚氯乙烯
复合材料
接枝改性
Wood Fiber
poly （vinyl chloride）
composite
grafting modification
