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首页> 外文期刊>Journal of Applied Polymer Science >Effect of the Components' Molar Mass and of the Mixing COnditions on the COmpatibilization of PE-LCP Blends by PE-g-LCP Copolymers
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Effect of the Components' Molar Mass and of the Mixing COnditions on the COmpatibilization of PE-LCP Blends by PE-g-LCP Copolymers

机译：组分的摩尔质量和混合条件对PE-g-LCP共聚物对PE-LCP共混物相容性的影响

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摘要

The rheology,morphology,and mechanical properties of blends of high-density polyethylene (HDPE) with a semiflexible liquid crystalline copolyseter (SBH) were studied in order to assess the compatibilizing ability of added PE-g-SBH copoly-mers,and its dependence on the molar mass of the PE matrix,and on the technique used for blend preparation.The PE-g-SBH copolymers were synthesized as described in previous articles,either by the polycondensation of the SBH monomers in the presence of a functionalized PE sample containing free carboxyl groups,or by reactive blending of the latter polymer with preformed SBH.Two samples of HDPE having different molar masses,and two samples of SBH with different melt viscosity and different microstructure,were used for preparing the blends.The two components and the compatibilizer were either blended in a single batch or used to prepare binary master blends to which the third component was added at a later stage.The results indicate that the PE-g-SBH copolymers do,in fact,compatibilize the PE-SBH blends and that the effect is more pronounced with the lower molar mass PE matrix and with the SBH sample having lower viscosity.The experiments carried out on blends prepared with different techniques show that the compatibilizing ability of the graft copolymer is improved if the latter is first blended with either of the two main components.
机译：研究了高密度聚乙烯（HDPE）与半柔性液晶共聚多聚物（SBH）的共混物的流变学，形貌和力学性能，以评估添加的PE-g-SBH共聚聚合物的相容性及其依赖性PE-g-SBH共聚物的合成如前文所述，是通过在含有官能团的PE样品存在下SBH单体的缩聚反应而完成的。游离的羧基，或后一种聚合物与预制的SBH反应共混。制备了两种摩尔质量不同的HDPE样品，以及两种熔融粘度和微结构不同的SBH样品，制备了两种组分。增容剂可以单批混合，也可以用于制备二元预混合物，并在稍后阶段添加第三种组分。结果表明，PE-g-SBH Copo实际上，胶粘剂确实能使PE-SBH共混物相容，并且在较低摩尔质量的PE基体和较低粘度的SBH样品中，效果更为明显。对不同技术制备的共混物进行的实验表明，其相容能力如果先将接枝共聚物与两种主要组分中的任一种共混，则接枝共聚物的产率会得到改善。

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