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首页> 外文期刊>Journal of fiber bioengineering and informatics >Dynamic Mechanical Properties and Thermal Stability of Poly(lactic acid) and Poly(butylene succinate) Blends Composites
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Dynamic Mechanical Properties and Thermal Stability of Poly(lactic acid) and Poly(butylene succinate) Blends Composites

机译：聚乳酸和聚丁二酸丁二醇酯共混物复合材料的动态力学性能和热稳定性

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摘要

The blend of poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) were prepared and extruded with various compositions and their molded properties were examined. Thermogravimetric analysis showed that thermal stability of the blends was higher than that of pure PLA and the weight loss of PLA/PBS (40/60 wt%) was lower than neat polymers. Differential scanning calorimetry thermograms of blends indicated that the thermal properties of PLA did not change noticeably when blended with PBS. The tensile strength and modulus of blends decreased with the increasing PBS content. But impact strength has improved about two times compared to pure PLA. Rheological results revealed that the addition of 10% and 20% of PBS increased the storage modulus, loss modulus and viscosity of the blend at nearly all frequencies, and decreased viscosity with increasing shear stress. Dynamic mechanical properties results showed the lowering of storage modulus of all blended PLA which indicated the increase of molecular mobility by adding PBS due to lower glass transition.
机译：制备了聚乳酸（PLA）和聚丁二酸丁二酯（PBS）的共混物，并用各种组合物挤出，并检查了它们的模塑性能。热重分析表明，共混物的热稳定性高于纯PLA，并且PLA / PBS的重量损失（40/60 wt％）低于纯聚合物。掺合物的差示扫描量热法热分析图表明，当与PBS掺混时，PLA的热性质没有明显改变。共混物的拉伸强度和模量随PBS含量的增加而降低。但与纯PLA相比，冲击强度提高了约两倍。流变学结果表明，在几乎所有频率下，添加10％和20％的PBS均可提高共混物的储能模量，损耗模量和粘度，并随着剪切应力的增加而降低粘度。动态力学性能结果显示所有共混的PLA的储能模量降低，这表明由于较低的玻璃化转变温度，通过添加PBS可以提高分子迁移率。

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