聚乳酸木塑复合材料的增韧及结晶性能  

Toughening and Crystallization Behavior of Poly(Lactic Acid)/Wood Flour Composite

作　　者：李冰[1] 董蓉[1] 高磊[1] 杨俊[1] 施庆峰[1] 郭卫红[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《高分子材料科学与工程》2011年第2期33-36,共4页Polymer Materials Science & Engineering

基　　金：国家科技支撑计划重点项目(2008BAC46B10)资助

摘　　要：选用不同弹性体乙烯-醋酸乙烯共聚物(EVA)、马来酸酐接枝乙烯辛烯共聚物(POE-MAH)、甲基丙烯酸缩水甘油酯接枝乙烯辛烯共聚物(POE-GMA)与木粉和聚乳酸在Haake转矩流变仪中熔融共混,考察弹性体对聚乳酸木塑复合材料冲击强度的影响,发现POE-GMA对聚乳酸木塑复合材料的增韧效果最好,研究了POE-GMA的用量对聚乳酸木塑复合材料的韧性的影响,并阐述了增韧机理,且当PLA/WF/POE-GMA质量比为80/20/20时,聚乳酸木塑复合材料的综合性能最佳。POE-GMA的加入使得聚乳酸木塑复合材料结晶温度下降,结晶度升高。Different elastomer ethylene-vinyl acetate（EVA）,maleic anhydride grafted ethylene-1-octene copolymer（POE-MAH）,glycidyl methacrylate grafted ethylene-1octene copolymer（POE-GMA）） and wood flour（WF） were blended with PLA in Haake mixer.Influence of elastomer on impact strength of poly（lactic acid）/wood flour composite was investigated.POE-GMA can greatly improve the toughness of poly（lactic acid）/wood flour composite,then the toughening mechanism is illustrated.And when the PLA/WF/POE-GMA mass ratio is 80/20/20,the wood/plastic composite has the best overall properties.The crystallization temperature of poly（lactic acid）/wood flour composite decrease and the crystallinity increases with the addition of POE-GMA.

关 键 词：聚乳酸木塑复合材料 弹性体 增韧 结晶 

分 类 号：TQ321[化学工程—合成树脂塑料工业]