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首页> 外文期刊>Journal of Applied Polymer Science >Compression molding and melt-spinning of the blends of poly(lactic acid) and poly(butylene succinate-co-adipate)
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Compression molding and melt-spinning of the blends of poly(lactic acid) and poly(butylene succinate-co-adipate)

机译：聚乳酸和聚丁二酸丁二酸共-己二酸酯共混物的压制成型和熔融纺丝

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Poly(lactic acid) (PEA) is a biobased polymer made from biomass having high mechanical properties for engineering materials applications. However, PIA has certain limited properties such as its brittleness and low heat distortion temperature. Thus, the aim of this study is to improve toughness of PLA by blending with poly(butylene succinate-co-adipate) (PBSA), the biodegradable polymer having high toughness. Polymer blends of PIA and PBSA were prepared using a twin screw extruder. The melt theology and the thermal property of the blends were examined. Further the blends were fabricated into compression molded parts and melt-spun fiber and were subjected to tensile and impact tests. When the PBSA content was low, PBSA phase was finely dispersed in the PIA matrix. On the other hand, when the PBSA content was high, this minor phase dispersed as a large droplet. Mechanical properties of the compression molded parts were affected by the dispersion state of PBSA minor component in PLA matrix. Impact strength of the compression molded parts was also improved by the addition of soft PBSA. The improvement was pronounced when the PBSA phase was finely dispersed in PIA matrix. However, the mechanical property of the blend fibers was affected by the postdrawing condition as well as the PBSA content. (C) 2014 Wiley Periodicals, Inc.
机译：聚乳酸（PEA）是一种由生物质制成的生物基聚合物，具有很高的机械性能，可用于工程材料。但是，PIA具有某些有限的属性，例如其脆性和低热变形温度。因此，本研究的目的是通过与具有高韧性的可生物降解的聚合物聚丁二酸丁二酸酯-共-己二酸酯（PBSA）混合来提高PLA的韧性。使用双螺杆挤出机制备PIA和PBSA的聚合物共混物。研究了共混物的熔体流变学和热性能。进一步地，将共混物制成压模部件和熔纺纤维，并进行拉伸和冲击测试。当PBSA含量低时，PBSA相细分散在PIA基质中。另一方面，当PBSA含量高时，该次要相分散为大液滴。压缩成型零件的机械性能受到PBSA微量组分在PLA基质中的分散状态的影响。通过添加软PBSA，还可以提高压模零件的冲击强度。当PBSA相精细分散在PIA基质中时，该改善显着。然而，共混纤维的机械性能受后拉伸条件以及PBSA含量的影响。 （C）2014威利期刊公司

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