Effects of two types of nanoparticles on the cure, rheological, and mechanical properties of rubber nanocomposites based on the NBR/PVC blends
Effects of two types of nanoparticles on the cure, rheological, and mechanical properties of rubber nanocomposites based on the NBR/PVC blends
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DOI：
10.1002/app.47550
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发表时间：
2019-07-05
影响因子：
3
通讯作者：
Mohammadian-Gezaz, Somayyeh
中科院分区：
文献类型：
--
作者：
Barghamadi, Mohammad;Karrabi, Mohammad;Mohammadian-Gezaz, Somayyeh
研究了石墨烯纳米片（GNP）和有机粘土蒙脱土（OMMT）对丁腈橡胶/聚氯乙烯（NBR/PVC）纳米复合材料的固化、松弛和力学性能的影响。 GNP 增强的纳米复合材料的焦烧和固化时间增加，而 OMMT 增强的纳米复合材料的这些参数降低。添加纳米粒子后最大扭矩和固化速率增加。在弛豫曲线中，随着纳米粒子和丙烯腈（ACN）含量的增加，短期和长期区域的斜率均升高。与未固化的化合物相比，固化的化合物具有显着更高的初始模量和最终模量、更大的弹性斜率和更低的粘性斜率。松弛测试结果表明，未固化样品的松弛百分比远高于固化样品。而且，随着GNP和OMMT的加入，该参数呈上升趋势。在未固化状态下，DG(S)/DG(L)参数随着纳米增强材料的添加而增加，而在固化状态下则降低。例如，含有通过 GNP 增强的 N3 的共混物在未固化状态下表现出 11% 的增加，而在固化状态下则减少 14%。通过掺入纳米粒子，拉伸强度、弹性模量和硬度得到提高，而 GNP 的效果更加强烈。在具有较高乙腈含量的 NBR 类型的样品中观察到类似的趋势。 (c) 2019 Wiley periodicals, Inc. J. Appl。聚合物。科学。 2019, 136, 47550。
The effects of graphene nanoplatelet (GNP) and organoclay montmorillonite (OMMT) on the curing, relaxation, and the mechanical properties of acrylonitrile-butadiene rubber/polyvinyl chloride (NBR/PVC) nanocomposites were investigated. Scorch and cure times of nanocomposites reinforced with GNP increased, while these parameters for nanocomposites reinforced with OMMT decreased. Maximum torque and cure rate increased after adding the nanoparticles. In the relaxation curves, with increasing nanoparticle and acrylonitrile (ACN) content, both the slopes of short- and long-term regions, raised. Cured compounds have the significantly higher initial and final modulus, the greater elastic slope, and lower viscous slope than the uncured ones. The results of the relaxation test showed that the relaxation percentage in the uncured samples was much higher than the cured ones. Also, with the addition of both GNP and OMMT, this parameter had an upward trend. DG(S)/DG(L) parameter increased with the addition of nano-reinforcements in the uncured state while decreasing in the cured state. For example, the blend containing N3 reinforced via GNP showed an 11% increase in the uncured state, whereas 14% reduction in the cured state. Tensile strength, elastic modulus, and hardness were improved by incorporating nanoparticles, while the effect of GNP was more intense. The similar trend observed in samples with NBR type of higher ACN content. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47550.