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首页> 外文期刊>Journal of Applied Polymer Science >Synergistic effect of lactic acid oligomers and laminar graphene sheets on the barrier properties of polylactide nanocomposites obtained by the in situ polymerization pre-incorporation method
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Synergistic effect of lactic acid oligomers and laminar graphene sheets on the barrier properties of polylactide nanocomposites obtained by the in situ polymerization pre-incorporation method

机译：乳酸低聚物和层状石墨烯片的协同作用对通过原位聚合预掺入方法获得的聚乳酸纳米复合材料的阻隔性能的影响

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摘要

Nanocomposites of polylactide (PLA) and functionalized graphene sheets (FGS) were obtained via melt compounding. Pre-incorporation of the FGS fillers into lactic acid oligomers (OLLA) by in situ melt polycondensation was performed with the aim of improving the FGS dispersion and distribution into the polymeric matrix. To evaluate the effect of the pre-incorporation step, a comparison with direct addition of the filler to the melt mixing process was carried out. Addition of OLLA and FGS led to enhanced better barrier properties. Specifically, reductions of up to 45% and 41% in oxygen and water vapor permeability were achieved, respectively. Mechanical and electrical properties of the PLA and its nanocomposites were also studied and correlated with both the addition of oligomers and the incorporation method. (C) 2015 Wiley Periodicals, Inc.
机译：通过熔融混合获得聚丙交酯（PLA）和功能化石墨烯片（FGS）的纳米复合材料。通过原位熔融缩聚将FGS填料预掺入乳酸低聚物（OLLA）中，以改善FGS的分散性和在聚合物基质中的分布。为了评估预掺入步骤的效果，进行了将填料直接添加到熔融混合过程中的比较。 OLLA和FGS的加入导致更好的阻隔性能。具体而言，氧气和水蒸气渗透率分别降低了多达45％和41％。还研究了PLA及其纳米复合材料的机械和电学性质，并将其与低聚物的添加和掺入方法相关联。 （C）2015威利期刊公司

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