Grafting of Isobutylene–Isoprene Rubber with Glycidyl Methacrylate and Its Reactive Compatibilization Effect on Isobutylene–Isoprene Rubber/Polyamides 12 Blends,Industrial & Engineering Chemistry Research

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Grafting of Isobutylene–Isoprene Rubber with Glycidyl Methacrylate and Its Reactive Compatibilization Effect on Isobutylene–Isoprene Rubber/Polyamides 12 Blends
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-11-02 , DOI: 10.1021/acs.iecr.1c03207
Kangqiang Gong _{1,

2} , Hongchi Tian ₃ , Heng Liu _{1,

2} , Xueying Liu _{1,

2} , Guo-Hua Hu ₄ , Bing Yu _{1,

2} , Nanying Ning _{1,

2} , Ming Tian _{1,

2} , Liqun Zhang _{1,

2}

Affiliation

Isobutylene–isoprene rubber (IIR)/polyamides 12 (PA12) blends are well known for their high gas barrier property and thus find applications in refrigeration hoses, tire inner liners, and so on. Nevertheless, the design and preparation of a good compatibilizer for the IIR/PA12 blend is required because of the poor compatibility between PA12 and the IIR phases. In this study, an efficient reactive compatibilizer, glycidyl methacrylate (GMA)-grafted IIR (IIR-g-GMA) copolymer, and GMA/styrene (St)-grafted IIR (IIR-g-St-GMA) copolymer were produced through the free-radical melt grafting reaction, which were initiated by dicumyl peroxide (DCP). Compared with IIR-g-GMA, IIR-g-St-GMA shows a significantly higher grafting degree because the fast generated, more stable St-grafted IIR macroradicals can act as a “bridge” to connect GMA molecules on IIR macroradicals. The results indicate that reactive compatibilization occurs by the introduction of the copolymer, and the extent of the interfacial reaction and compatibilization effect increases with increasing the copolymer content and the grafting degree of GMA. Nanomechanical mapping images of atomic force microscopy show that the average interfacial thickness of the blend largely increases from approximately 55 to 120 nm after compatibilization with 30 phr IIR-g-St-GMA. Meanwhile, the size of the IIR dispersed phase domains largely decreases from 3 to 5 μm to approximately 0.7 μm after compatibilization with this copolymer. The compatibilization mechanism of the copolymers on IIR/PA12 blends is discussed.

中文翻译：

异丁烯-异戊二烯橡胶与甲基丙烯酸缩水甘油酯的接枝及其对异丁烯-异戊二烯橡胶/聚酰胺 12 共混物的反应增容作用

异丁烯-异戊二烯橡胶 (IIR)/聚酰胺 12 (PA12) 共混物以其高气体阻隔性而闻名，因此可用于制冷软管、轮胎内衬等。然而，由于 PA12 和 IIR 相之间的相容性较差，因此需要设计和制备用于 IIR/PA12 混合物的良好增容剂。在本研究中，一种高效的反应性增容剂、甲基丙烯酸缩水甘油酯 (GMA)-接枝的 IIR (IIR- g -GMA) 共聚物和 GMA/苯乙烯 (St)-接枝的 IIR (IIR - g -St-GMA) 共聚物通过自由基熔融接枝反应，由过氧化二枯基（DCP）引发。与IIR- g- GMA相比，IIR- g-St-GMA 显示出显着更高的接枝度，因为快速生成、更稳定的 St-grafted IIR 大自由基可以作为“桥梁”连接 IIR 大自由基上的 GMA 分子。结果表明，共聚物的引入发生了反应增容，界面反应的程度和增容效应随着共聚物含量和GMA接枝度的增加而增加。原子力显微镜的纳米力学映射图像显示，在与 30 phr IIR- g相容后，共混物的平均界面厚度从大约 55 nm 大幅增加到 120 nm。-St-GMA。同时，在与该共聚物相容后，IIR 分散相域的尺寸从 3 到 5 μm 大幅减小到大约 0.7 μm。讨论了共聚物对 IIR/PA12 共混物的增容机制。

更新日期：2021-11-17

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