甲基丙烯酸缩水甘油酯接枝聚乳酸共聚物的制备与表征  

Preparation and Characterization of PLA Copolymer Grafted by Glycidyl Methacrylate

作　　者：赵宇超[1] 张举[1] 吴智华[1] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065

出　　处：《工程塑料应用》2014年第1期18-22,共5页Engineering Plastics Application

基　　金：广东省2012年重大科技项目(2012A0801050021)

摘　　要：在哈克转矩流变仪中,用甲基丙烯酸缩水甘油酯(GMA)熔融接枝聚乳酸(PLA),制备高耐热性、良好拉伸强度和较好接枝率的GMA接枝PLA(PLA-g-GMA)共聚物。对PLA-g-GMA进行了傅里叶变换红外光谱分析、接枝率测试、热失重分析和力学性能测试。结果表明,在恒温175℃的密炼机中,以过氧化苯甲酰(BPO)为引发剂,当GMA单体用量为4 g,反应时间8 min,能成功地制备出接枝率为0.950 5%的PLA-g-GMA共聚物。与纯PLA相比PLA-g-GMA的起始分解温度和完全分解温度均提高60℃以上;在一定实验条件下,PLA-g-GMA的拉伸强度有所提高。Poly（lactic acid）（PLA） grafted by glycidyl methacrylate（GMA） with high heat resistance, PLA grafted by GMA （PLA-g-GMA） with good tensile strength and grafting ratio was prepared by melt-compounding in HAAKE torque rheometer. PLA-g-GMA was characterized by FTIR, grafting ratio, mechanical testing and TG. The result show that PLA-g-GMA which the grafting ratio is 0.950 5% can be gotten under the temperature of 175℃, with blending benzoyl peroxide （BPO） as initiator with 4 g of GMA in the internal mixer for 8 min. Com-pared with pure PLA, both the initial decomposition temperature and the completely decomposition temperature of PLA-g-GMA raise more than 60 ℃ . The tensile strength of PLA-g-GMA are improved under experimental certain conditions.

关 键 词：聚乳酸 接枝 耐热性 力学性能 制备 表征 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]