The study of ionic and entanglements self-healing behavior of zinc dimethacrylate enhanced natural rubber and natural rubber/butyl rubber composite,Journal of Applied Polymer Science

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The study of ionic and entanglements self-healing behavior of zinc dimethacrylate enhanced natural rubber and natural rubber/butyl rubber composite
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-12-20 , DOI: 10.1002/app.52048
Ming Zhao ₁ , Hui Chen ₁ , Jiaxin Yuan ₁ , Yibo Wu ₁ , Shuxin Li ₁ , Ruofan Liu ₁

Affiliation

This study reported the self-healing behavior of natural rubber (NR) and NR-butyl rubber (IIR) composites, which was enhanced by graft-polymerization of zinc dimethacrylate (ZDMA) onto rubber chains. Using dicumyl peroxide (DCP) as the vulcanization agent formed a reversible covalent/ionic crosslinking supermolecular network. By controlling the vulcanization process, a reversible supramolecular network composed of covalent cross-linking, ionic cross-linking, and physical entanglement is obtained. Experiments shown that the self-repairing behavior of ionic bonds comes from the recombination of ionic clusters. Although the saturated backbone of IIR is hardly to provide ionic or covalent crosslinks, the addition of IIR can increase the degree of physical entanglements level of rubber and provide physical self-healing behavior. The entanglement healing is weaker than ionic cross-linking, but due to the better chain mobility, the multiple times healing ability of IIR introduced by entanglements is better than covalent or ionic bonds.

中文翻译：

二甲基丙烯酸锌增强天然橡胶及天然橡胶/丁基橡胶复合材料的离子和纠缠自愈行为研究

本研究报告了天然橡胶 (NR) 和 NR-丁基橡胶 (IIR) 复合材料的自修复行为，通过将二甲基丙烯酸锌 (ZDMA) 接枝聚合到橡胶链上来增强自修复行为。以过氧化二异丙苯（DCP）为硫化剂，形成了可逆的共价/离子交联超分子网络。通过控制硫化过程，得到由共价交联、离子交联和物理缠结组成的可逆超分子网络。实验表明，离子键的自我修复行为来自于离子簇的重组。虽然 IIR 的饱和主链很难提供离子或共价交联，但添加 IIR 可以提高橡胶的物理缠结程度并提供物理自修复行为。

更新日期：2021-12-20

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