聚乳酸/马来酸酐接枝线形低密度聚乙烯合金的制备及其发泡行为研究  

Foaming Behaviors of Poly (lactic acid) and Maleic Anhydride-grafted Linear Low-density Polyethylene Blends

作　　者：韩硕 王贤增 周洪福[1,2] 胡倩 赵明明 HAN Shuo;WANG Xianzeng;ZHOU Hongfu;HU Qian;ZHAO Mingming(School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China;Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics,Beijing 100048,China)

机构地区：[1]北京工商大学材料与机械工程学院,北京100048 [2]塑料卫生与安全质量评价技术北京市重点实验室,北京100048

出　　处：《中国塑料》2018年第10期71-78,共8页China Plastics

基　　金：国家自然科学基金(51703004;51673004);大学生科学研究与创业行动计划项目(20181001102);科技创新服务能力建设-基本科研业服务费-食品包装用聚合物发泡材料研究平台(PXM2018-014213-000033)

摘　　要：通过熔融共混法制备聚乳酸(PLA)/马来酸酐接枝线形低密度聚乙烯(PE-LLD-g-MAH)合金,使用差示扫描量热仪、旋转流变仪、扫描电子显微镜、偏光显微镜等仪器研究了不同PE-LLD-g-MAH含量的PLA合金的结晶性能、流变性能、断面形貌及发泡性能等。结果表明,随着PE-LLD-g-MAH含量的增加,PLA/PE-LLD-g-MAH合金的冷结晶温度大幅提高和流变性能明显改善,样品断面出现了明显的"海-岛"结构,发泡样品的泡孔尺寸逐渐减小,泡孔密度增加。Poly(lactic acid)(PLA)was blended with maleic anhydride-grafted linear low-density polyethylene(PE-LLD-g-MAH)by a melt-mixing method,and the crystallization behaviors,rheological properties and morphologies of the resulting blends at different content of PE-LLD-g-MAH were investigated by differential scanning calorimetry,rotational rheometer,scanning electron microscopy and polarizing optical microscopy.The results indicated that the crystallinity and melt elasticity of the blends were both improved with an increase of PE-LLD-g-MAH content,and a“sea-island”structure was clearly observed.Moreover,the cell sizes of PLA blending foams decreased but their cell densities increased with the addition of PE-LLD-g-MAH.

关 键 词：聚乳酸 马来酸酐接枝线形低密度聚乙烯 发泡 熔融共混 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]