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首页> 外文期刊>Journal of Polymers and the Environment >Poly(Ethylene Glycol) as a Compatibilizer for Poly(Lactic Add)/ Thermoplastic Starch Blends
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Poly(Ethylene Glycol) as a Compatibilizer for Poly(Lactic Add)/ Thermoplastic Starch Blends

机译：聚（乙二醇）/聚（乳酸）/热塑性淀粉混合物的相容剂

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摘要

A new route to prepare poly(lactic acid) (PLA)/ thermoplastic starch (TPS) blends is described in this work using poly(ethylene glycol) (PEG), a non-toxic polymer, as a compatibilizer. The influence of PEG on the morphology and properties of PLA/TPS blends was studied. The blends were processed using a twin-screw micro-compounder and a micro-injector. The morphologies were analyzed by scanning and transmission electron microscopies and the material properties were evaluated by dynamic-mechanical, differential scanning calorimetry, thermogravimetric analysis and mechanical tests. PLA/TPS blends presented large TPS phase size distribution and low adhesion between phases which was responsible for the lower elastic modulus of this blend when compared to pure PLA. The addition of PEG resulted in the increase of PLA crystallization, due to its plasticizing effect, and improvement of the interfacial interaction between TPS and PLA matrix. Results show that incorporation of PEG increased the impact strength of the ternary blend and that the elastic modulus remained similar to the PLA/TPS blend.
机译：在这项工作中，使用无毒聚合物聚乙二醇（PEG）作为增容剂，描述了制备聚乳酸（PLA）/热塑性淀粉（TPS）共混物的新途径。研究了PEG对PLA / TPS共混物的形态和性能的影响。使用双螺杆微粉碎机和微型注射器处理共混物。通过扫描和透射电子显微镜分析形态，并通过动态机械，差示扫描量热法，热重分析和机械测试评价材料性能。与纯PLA相比，PLA / TPS共混物呈现出较大的TPS相尺寸分布和相间低粘附性，这是该共混物较低的弹性模量的原因。 PEG的加入由于其增塑作用而导致了PLA结晶的增加，并且改善了TPS与PLA基质之间的界面相互作用。结果表明，掺入PEG可提高三元共混物的冲击强度，并且弹性模量保持与PLA / TPS共混物相似。

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