聚乳酸反应接枝甲基丙烯酸缩水甘油酯及其增容作用  

Preparation of Poly( Lactic Acid) Grafted with Glycidyl Methacrylate Through Reactive Extrusion and Its Compatibilization

作　　者：谢振华[1] 储富祥[2] 王春鹏[1,2] 金立维[1,2] 

机构地区：[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室,江苏南京210042 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《高分子材料科学与工程》2015年第5期125-128,134,共5页Polymer Materials Science & Engineering

基　　金：国家级林业科技成果推广项目([2012]19号)

摘　　要：通过熔融反应挤出法制备聚乳酸接枝甲基丙烯酸缩水甘油酯(PLA-g-GMA)用于增容聚乳酸/杨木粉(PLA/WF)复合材料;通过核磁共振氢谱和红外光谱对PLA-g-GMA的结构进行了分析,通过力学性能测试、扫描电镜和动态热机械分析对复合材料进行了表征。结果表明,随着增容剂含量的增加,复合材料的拉伸强度和弯曲强度逐渐提高,相比未增容材料的强度最大可分别提高31%和21%;扫描电镜结果显示PLA-g-GMA能增强PLA与WF的界面相互作用,复合材料拉伸断面的空洞和间隙逐渐减少。动态力学分析结果显示随着PLA-g-GMA用量的增加,材料中PLA相的玻璃化转变温度呈下降的趋势。Poly( lactic acid)-graft-glycidyl methacrylate( PLA-g-GMA) prepared by melt blending was used to compatibilize poly( lactic acid) / wood flour( PLA / WF) composites. The structure of PLA-g-GMA was investigated by1 Hnuclear magnetic resonance(1H-NMR) and Fourier transform infrared spectroscopy( FT-IR),and the composites were characterized by mechanical testing,scanning electron microscope( SEM) and dynamic mechanical analysis( DMA).The results show that with increasing the PLA-g-GMA content,the tensile strength and flexural strength increase by 31%and 21% respectively compared to composites without PLA-g-GMA. Micromorphologic investigation reveals the interfacial adhesion between PLA and WF phase is improved by the introduction of PLA-g-GMA,and cavities and gaps on tensile fracture surface are diminished gradually. The results of DMA analysis reveal that the glass transition temperature of PLA phase in composites trends to decrease with increasing the content of PLA-g-GMA.

关 键 词：聚乳酸 甲基丙烯酸缩水甘油酯 反应挤出 相容性 

分 类 号：TQ317[化学工程—高聚物工业] TB33[一般工业技术—材料科学与工程]