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Preparation and thermomechanical properties of nanocrystalline cellulose reinforced poly(lactic acid) nanocomposites

机译:纳米晶纤维素增强聚(乳酸)纳米复合材料的制备及热机械性能

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A two-step process was developed to prepare nanocrystalline cellulose (NCC) reinforced poly(lactic acid) (PLA) nanocomposites using polyethylene glycol (PEG) as a compatibilizer. It was composed of solvent mixing and melt blending. The NCC was well dispersed in the PLA matrix. A network was formed at high NCC-to-PEG ratio at which the amount of the PEG was not enough to cover all the surfaces of the NCC. The formation of the network was confirmed by the occurrence of a plateau for the storage modulus at low frequency. The incorporation of the PEG and NCC could improve the crystallinity of the PLA. The elongation at break increased from 11.0% for the neat PLA to 106.0% for the composites including 6 wt % NCC, impact strength was improved from 0.864 to 2.64 kJ m(-2) and tensile strength did not change significantly for the same 6 wt % NCC composites. (C) 2016 Wiley Periodicals, Inc.
机译:开发了一种两步方法以制备使用聚乙二醇(PEG)作为增容剂的纳米晶纤维素(NCC)增强聚(乳酸)(PLA)纳米复合材料。 它由溶剂混合和熔融混合组成。 NCC良好分散在PLA矩阵中。 以高NCC到PEG的比率形成网络,在该比例的高NCC-TO-PEG比中不足以覆盖NCC的所有表面。 通过低频下的储存模量的发生,确认网络的形成。 佩格和NCC的掺入可以改善PLA的结晶度。 突破的伸长率从整齐的PLA增加到106.0%的复合材料,其中包括6wt%NCC,从0.864增加到2.64kJ m(-2),并且拉伸强度不会显着变化6重量 %NCC复合材料。 (c)2016 Wiley期刊,Inc。

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