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首页> 外文期刊>Journal of Applied Polymer Science >Thermoplastic vulcanizate nanocomposites based on polyethylene/reclaimed rubber: A correlation between carbon nanotube dispersion state and electrical percolation threshold
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Thermoplastic vulcanizate nanocomposites based on polyethylene/reclaimed rubber: A correlation between carbon nanotube dispersion state and electrical percolation threshold

机译：基于聚乙烯/再生橡胶的热塑性硫化纳米复合材料：碳纳米管分散状态与电渗滤阈值之间的相关性

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摘要

A three-step melt blending process was utilized to produce linear low-density polyethylene (LLDPE)/reclaimed rubber (RR)/carbon nanotube (CNT) nanocomposites in the presence of maleic anhydride grafted polyethylene as a compatibilizer. The effect of LLDPE/RR ratio and CNT content on the morphological, thermal, mechanical, and rheological behavior of these dynamically vulcanized LLDPE/RR nanocomposites were investigated. The morphological study showed that the RR was dispersed in the LLDPE matrix, and CNT addition led to an improved morphology as smaller RR sizes inside LLDPE were observed. The mechanical results revealed that increasing the RR content decreased the hardness, modulus of elasticity, and elongation at break while CNT improved the tensile properties and other mechanical properties. The differential scanning calorimeter analysis showed that the CNT improved the LLDPE crystallization by acting as nucleation agents. Dynamic mechanical analysis showed higher storage modulus and lower loss factor as compared to the neat blend due to mobility restrictions of the polymer chains induced by the presence of CNT. For the conditions studied, the electrical percolation threshold was found to occur at a very low CNT concentration (about 1 wt %) compared to the literature because of the specific structure produced leading to CNT residing in the LLDPE matrix and at the interface between both polymeric phases. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47795.
机译：利用三步熔融共混工艺在马来酸酐接枝聚乙烯作为增容剂的情况下在马来酸酐接枝聚乙烯存在下产生线性低密度聚乙烯（LLDPE）/再生橡胶（RR）/碳纳米管（CNT）纳米复合材料。研究了LLDPE / RR比和CNT含量对这些动态硫化LLDPE / RR纳米复合材料的形态学，热，机械和流变行为的影响。形态学研究表明，RR分散在LLDPE基质中，并且CNT加入导致改善的形态，因为观察到LLDPE内部的较小的RR尺寸。机械结果表明，增加RR含量降低了硬度，弹性模量和断裂的伸长率，而CNT改善了拉伸性能和其他机械性能。差分扫描量热计分析表明，CNT通过用作成核剂来改善LLDPE结晶。动态力学分析表明，与通过CNT的存在诱导的聚合物链的迁移率限制，储存模量较高，较低的损耗因子相比。对于所研究的条件，由于导致在LLDPE基质中的CNT和两种聚合物之间的界面产生的特定结构，发现与文献非常低的CNT浓度（约1wt％）以非常低的CNT浓度（约1wt％）发生电渗滤阈值。阶段。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47795。

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