硅橡胶/苯并恶嗪树脂基纳米复合材料：兼容性和热稳定性研究

IF 3.2 4区工程技术 Q2 ENGINEERING, CHEMICAL

Polymer Engineering and Science Pub Date : 2024-07-11 DOI:10.1002/pen.26824

Jalal Faghihi, Ahmad Arefazar, Hossein Ali Khonakdar, Mahdi Tohidian

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引用次数: 0

摘要

本研究制备了硅橡胶（SR）和苯并恶嗪（BZ）的混合物，并用马来酸酐接枝的乙丙二烯单体（EPDM-g-MA）作为相容剂。3 phr MA 接枝 EPDM 的接枝效率最高，凝胶含量也相对较低。结果表明，在 85/15 SR/BZ 混合物中，8 phr（EPDM-g-MA）是最佳的相容剂含量，并被用于进一步的研究。形态学研究证明，在最佳相容剂含量（8 phr）条件下，分散液滴尺寸的减小幅度最大（从 1.32 μm 减小到 0.23 μm）。在相容剂含量为 8 phr 时，混合组分的玻璃化转变温度差异最小，这一点已通过 DMTA 得到证实。此外，还研究了相容和未相容混合物的机械和固化特性。结果表明，相容样品的拉伸强度高于未相容混合物。对 85/15 SR/BZ 混合物和含有 1、3 和 5 phr 聚低聚硅氧烷（POSS）纳米颗粒的纳米复合材料进行的热研究表明，含有 1 和 3 phr POSS 的纳米复合材料的热稳定性优于含有 5 phr POSS 的纳米复合材料。

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Silicone rubber/benzoxazine resin‐based nanocomposites: A study on compatibility and thermal stability

In this study, blends of silicone rubber (SR) and benzoxazine (BZ) were prepared accompanied by ethylene propylene diene monomer grafted with maleic anhydride (EPDM‐g‐MA) as the compatibilizing agent. A total of 3 phr MA grafted EPDM showed the most favorable grafting efficiency and relatively lower gel content. Results showed that 8 phr (EPDM‐g‐MA) was the optimal compatibilizer content in the 85/15 SR/BZ blend, which was used for further studies. Morphological studies proved that the greatest reduction in the dispersed droplet size (from 1.32 to 0.23 μm) occurred at this optimal compatibilizer loading (8 phr). The lowest difference between the glass transition temperatures of the blend components was observed at the 8 phr compatibilizer content, which was confirmed by DMTA. The mechanical and curing characteristics of compatibilized and uncompatibilized blends were also studied. The results evinced that the tensile strength of the compatibilized samples was higher than that of the uncompatibilized blends. Thermal studies on the 85/15 SR/BZ blend and nanocomposites containing 1, 3, and 5 phr polyhedral oligomeric silsesquioxane (POSS) nanoparticles revealed that the thermal stability of nanocomposites containing 1 and 3 phr POSS was superior to that of the nanocomposite with 5 phr POSS.

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来源期刊

Polymer Engineering and Science 工程技术-高分子科学

CiteScore

5.40

自引率

18.80%

发文量

329

审稿时长

3.7 months

期刊介绍： For more than 30 years, Polymer Engineering & Science has been one of the most highly regarded journals in the field, serving as a forum for authors of treatises on the cutting edge of polymer science and technology. The importance of PE&S is underscored by the frequent rate at which its articles are cited, especially by other publications - literally thousand of times a year. Engineers, researchers, technicians, and academicians worldwide are looking to PE&S for the valuable information they need. There are special issues compiled by distinguished guest editors. These contain proceedings of symposia on such diverse topics as polyblends, mechanics of plastics and polymer welding.