聚乳酸/热塑性淀粉/POE-g-GMA共混材料的制备和性能  

Preparation and Characterization of PLA/TPS/GPOE Composites

作　　者：施庆锋[1] 赵丹丹[2] 周旭[1] 杨俊[1] 吴驰飞[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,超细材料制备与应用教育部重点实验室,华东理工大学高分子合金研究室,上海200237 [2]华东理工大学化学与分子学院,上海200237

出　　处：《高分子材料科学与工程》2011年第7期167-171,共5页Polymer Materials Science & Engineering

基　　金：国家科技支撑计划重点项目(2008BAC46B10)资助

摘　　要：采用甲基丙烯酸缩水甘油酯(GMA)接枝(乙烯/辛烯)共聚物(GPOE)作为增韧剂,利用Haake转矩流变仪熔融制备了聚乳酸(PLA)/热塑性淀粉(TPS)/GPOE共混材料。通过拉伸、冲击、动态热力学、差示扫描量热、扫描电镜等方法对共混材料进行研究:PLA共混材料伸长率可达到400%左右,冲击性能有大幅提高;TPS中甘油富相T(β)随着TPS的加入先下降后上升;GPOE的加入使TPS相尺寸减小,相容性提高。Poly（lactic acid）（PLA）/thermoplastic starch（TPS）/glycidyl methacrylate（GMA） grafted poly（ethylene octane）（GPOE） composites were gained by melting mix in Haake.Elongation of PLA/TPS/GPOE is improved to 400% and the impact strength has a great improvement.GPOE and TPS have played the role of plasticizer in PLA composites and T（β） declines first and then ascends with the increase of TPS content.From scanning electron microscopy（SEM） graphs,the compatibility of PLA/TPS/GPOE is improved with adding GPOE and the phase size of TPS is decreased.Possible reaction（GMA ＆ glycerol） in PLA composites has been also proved through water absorption test.The possible reaction equation and drawing of glycerol enriched in TPS were proposed.

关 键 词：聚乳酸 热塑性淀粉 甲基丙烯酸缩水甘油酯接枝乙烯-辛烯共聚物 增韧 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业]