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首页> 外文期刊>Polymer Composites >Prediction of mechanical properties of PP/EVA polymer blends governed by EVA phase change in the presence of environmentally-friendly inorganic tungsten disulfide nanotubes (INT-WS2)
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Prediction of mechanical properties of PP/EVA polymer blends governed by EVA phase change in the presence of environmentally-friendly inorganic tungsten disulfide nanotubes (INT-WS2)

机译：在环境友好的无机钨二硫纳米管存在下EVA相变（INT-WS2）的EVA相变治理的PP / EVA聚合物共混物的预测（INT-WS2）

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Anticipating dynamic mechanical behavior of polymeric materials over long period of time and under different frequencies is the first step to be taken to afford load-bearing applications. Nevertheless, what we know about dynamic mechanical behavior of polymers is only limited to experiments, which necessitates large pools of data spending too much money, time, and energy. Environmentally-friendly inorganic tungsten disulfide nanotube (INT-WS2), was introduced to polypropylene/ethylene vinyl acetate copolymer (PP/EVA, 75/25 wt/wt) blends through melt mixing, and dynamic mechanical analysis (DMA) frequency sweep tests were performed to obtain master curves based on time-temperature superposition (TTS) theorem. The influence of EVA phase change (solid, semi solid, and melt domains) on the creep and recovery behavior of nanocomposites in linear region was then studied. It was found that using INT-WS2 along with PP-g-MA results in distinctive improvement in creep-recovery response of nanocomposites. Burger and Weibull models were used to mimic viscoelastic behavior of the nanocomposites. Creep compliance master curves predicted creep compliance, while analysis of cyclic creep-recovery at 30 degrees C revealed almost constant permanent strain parameters for sample having 5 wt% INT-WS2 and PP-g-MA after three times repeating test cycles. Influence of phase change phenomenon of EVA domains on creep-recovery behavior of nanocomposites was mechanistically demonstrated. POLYM. COMPOS., 40:1964-1978, 2019. (c) 2018 Society of Plastics Engineers
机译：在长时间内预期聚合物材料的动态力学行为，并且在不同的频率下是要接受承受承重应用的第一步。然而，我们对聚合物的动态力学行为所知仅限于实验，这需要大量的数据消耗太多的金钱，时间和能量。通过熔融混合将环保型无机钨纳米管（INT-WS2）引入聚丙烯/乙烯乙烯基乙酸乙烯酯共聚物（PP / EVA，75/25重量）共混物，并且动态的机械分析（DMA）频率扫描试验执行基于时间温度叠加（TTS）定理获得主曲线。然后研究了EVA相变（固体，半固体和熔融结构域）对线性区域纳米复合材料蠕变和恢复行为的影响。发现使用Int-WS2以及PP-G-MA的纳米复合材料的蠕变恢复响应的显着改善。汉堡和威布尔模型用于模拟纳米复合材料的粘弹性行为。蠕变顺应性主曲线预测蠕变顺应性，而30摄氏度的循环蠕变恢复的分析显示出几乎恒定的永久性应变参数，其在重复试验周期的三次后，具有5wt％Int-Ws2和PP-G-MA的样品。机械地证明了EVA结构域相变现象对纳米复合材料蠕变恢复行为的影响。聚合物。 Compos。，40：1964-1978,2019。（c）2018塑料工程师协会

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