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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical and thermal properties of wood fibers reinforced poly(lactic acid)/thermoplasticized starch composites
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Mechanical and thermal properties of wood fibers reinforced poly(lactic acid)/thermoplasticized starch composites

机译：木纤维的机械和热性能增强聚（乳酸）/热塑性淀粉复合材料

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摘要

Thermoplasticized starch (TPS) filled poly(lactic acid) (PLA) blends are usually found to have low mechanical properties due to poor properties of TPS and inadequate adhesion between the TPS and PLA. The purpose of this study was to investigate the reinforcing effect of wood fibers (WF) on the mechanical properties of TPS/PLA blends. In order to improve the compatibility of wood with TPS/PLA blends, maleic anhydride grafted PLA (MA-g-PLA) copolymer was synthesized and used. TPS, TPS/PLA blends, and WF reinforced TPS/PLA composites were prepared by twin-screw extrusion and injection molded. Scanning electron microscope and crystallinity studies indicated thermoplasticity in starch. WF at two different weight proportions, that is, 20% and 40% with respect to TPS content were taken and MA-g-PLA at 10% to the total weight was chosen to study the effect on mechanical properties. At 20% WF and 10% MA-g-PLA, the tensile strength exhibited 86% improvement and flexural strength exhibited about 106% improvement over TPS/PLA blends. Increasing WF content to 40% further enhanced tensile strength by 128% and flexural strength by 180% with respect to TPS/PLA blends. Thermal behavior of blends and composites was analyzed using dynamic mechanical analysis and thermogravimetric analysis. (c) 2017 Wiley Periodicals, Inc.
机译：通常发现热塑性淀粉（TPS）填充的聚（乳酸）（PLA）共混物由于TPS的特性差和TPS和PLA之间的粘附性不足而具有低机械性能。本研究的目的是探讨木纤维（WF）对TPS / PLA混合物的机械性能的增强效果。为了改善木材与TPS / PLA混合物的相容性，合成并使用马来酸酐接枝PLA（MA-G-PLA）共聚物。 TPS，TPS / PLA混合物和WF增强TPS / PLA复合材料由双螺杆挤出和注塑制备。扫描电子显微镜和结晶性研究表明淀粉中的热塑性。在两种不同的重量比例下，取相对于TPS含量的20％和40％，选择10％的MA-G-PLA，以研究对机械性能的影响。在20％wf和10％ma-g-pla，拉伸强度表现出86％的提高，弯曲强度显示出TPS / PLA共混物的约106％。将Wf含量增加到40％进一步增强的拉伸强度，并相对于TPS / PLA混合物将弯曲强度的弯曲强度增加180％。使用动态力学分析和热重分析分析了混合物和复合材料的热行为。 （c）2017 Wiley期刊，Inc。

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