Reactive Compatibilization of Polylactide/Polypropylene Blends
Reactive Compatibilization of Polylactide/Polypropylene Blends
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DOI：
10.1021/acs.iecr.5b00882
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发表时间：
2015-06-17
影响因子：
4.2
通讯作者：
Hillmyer, Marc A.
中科院分区：
文献类型：
--
作者：
Xu, Yuewen;Loi, Jesse;Hillmyer, Marc A.
将聚乳酸（PLA）与聚丙烯（PP）或聚丙烯基弹性体（PBE，威达美）熔融共混，以改善其力学性能。乙烯-甲基丙烯酸缩水甘油酯-丙烯酸甲酯嵌段共聚物（PEGMMA，Lotader）通过偶联到PLA的端基而用作增容剂。接枝共聚物的形成增强了聚乳酸和聚烯烃之间的粘附力，降低了界面张力。PLA/聚烯烃增容共混物的形态，力学和流变性能进行了研究，共混物表现出显着改善的断裂伸长率和拉伸韧性相比，相应的二元共混物。PEGMMA作为反应性相容剂的显著功效允许桥接两种不混溶但重要的热塑性塑料聚丙交酯和聚丙烯，以及生产韧性PLA/PP共混材料。
Polylactide (PLA) was melt blended with either polypropylene (PP) or a polypropylene based elastomer (PBE, Vistamaxx) in an effort to improve its mechanical properties. An ethylene-glycidyl methacrylate-methyl acrylate terpolymer (PEGMMA, Lotader) was utilized as compatibilizer through coupling to the end groups of PLA. Graft copolymers formed enhanced the adhesion between PLA and polyolefin phases and lowered the interfacial tension. The morphological, mechanical, and rheological properties of the PLA/polyolefin compatibilized blends were investigated, and the blends exhibited substantial improvement in elongation at break and tensile toughness as compared to the corresponding binary blends. The remarkable efficacy of PEGMMA as a reactive compatibilizing agent allows the bridging of two immiscible but important classes of thermoplastics, polylactide and polypropylene, and the production of ductile PLA/PP blend materials.