有机蒙脱石对未固化和固化的丙烯腈-丁二烯橡胶/聚（乙烯-共-醋酸乙烯酯）纳米复合材料的流变学和晶体结构的影响,Polymer Composites

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有机蒙脱石对未固化和固化的丙烯腈-丁二烯橡胶/聚（乙烯-共-醋酸乙烯酯）纳米复合材料的流变学和晶体结构的影响
Polymer Composites ( IF 4.8 ) Pub Date : 2021-03-31 , DOI: 10.1002/pc.26049
Mohammad Razavi‐Nouri ₁ , Alireza Sabet ₁ , Maryam Mohebbi ₁

Affiliation

本研究的目的是评估有机蒙脱石 (OMMT) 含量对未固化和轻度固化的丁腈橡胶 (NBR)/聚（乙烯-共聚-乙烯基）的流变学、晶体结构以及硬度和拉伸性能的影响。醋酸酯) (EVA)/OMMT 纳米复合材料。制备含有 0 至 7 重量％ OMMT 的纳米复合材料，然后用 0.3 重量％过氧化二异丙苯固化。低角度 X 射线衍射结果表明，固化明显改善了具有高 OMMT 含量的材料的剥离程度。从硬度和拉伸试验中发现，在所检测的 OMMT 范围内，固化纳米复合材料的硬度、拉伸强度、模量和断裂能值高于未固化材料。从卡森图获得的结果表明，在恒定 OMMT 含量下，纳米填料在增加未固化材料的屈服应力方面比固化对应物的屈服应力更有效。未固化材料的特征弛豫时间也随着 OMMT 含量的增加而逐渐增加；然而，固化材料的值更高，并且对纳米填料含量的敏感性要低得多。我由广角X射线衍射图计算出的EVA的₁₁₀ /I ₂₀₀峰强度比随着OMMT含量的增加而降低，对于未固化和固化的材料；然而，治愈的对应物的值总是更高。

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The impact of organo-montmorillonite on rheology and crystalline structure of uncured and cured acrylonitrile-butadiene rubber/poly(ethylene-co-vinyl acetate) nanocomposites

The aim of this study was to evaluate the influence of organo-montmorillonite (OMMT) content on rheology, crystalline structure, and also hardness and tensile properties of uncured and lightly cured acrylonitrile-butadiene rubber (NBR)/poly(ethylene-co-vinyl acetate) (EVA)/OMMT nanocomposites. The nanocomposites containing 0 to 7 wt% OMMT was prepared and then cured with 0.3 wt% dicumyl peroxide. The low-angle X-ray diffraction results revealed that curing clearly improved the degree of exfoliation in the materials having high OMMT content. It was found from the hardness and tensile tests that the values of hardness, tensile strength, modulus, and energy at break were higher for the cured nanocomposites than those of the uncured materials in the range of OMMT examined. The results obtained from the Casson plot revealed that the nanofiller played a more effective role in increasing the yield stress of the uncured materials than that of the cured counterparts at a constant OMMT content. The characteristic relaxation time was also progressively increased with OMMT content for the uncured materials; however, the value was higher for the cured materials and it was much less sensitive to the nanofiller content. The I₁₁₀/I₂₀₀ peak intensity ratio of EVA calculated from the wide-angle X-ray diffraction patterns decreased with increasing in OMMT content for the uncured and cured materials; however, the value was always higher for the cured counterparts.

更新日期：2021-03-31

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