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Self-curing triphenol A-based phthalonitrile resin precursor acts as a flexibilizer and curing agent for phthalonitrile resin†
RSC Advances ( IF 3.9 ) Pub Date : 2018-09-24 00:00:00 , DOI: 10.1039/c8ra06926c Yue Hu 1 , Zhihuan Weng 1 , Yu Qi 1 , Jinyan Wang 1 , Shouhai Zhang 1 , Cheng Liu 1 , Lishuai Zong 1 , Xigao Jian 1
RSC Advances ( IF 3.9 ) Pub Date : 2018-09-24 00:00:00 , DOI: 10.1039/c8ra06926c Yue Hu 1 , Zhihuan Weng 1 , Yu Qi 1 , Jinyan Wang 1 , Shouhai Zhang 1 , Cheng Liu 1 , Lishuai Zong 1 , Xigao Jian 1
Affiliation
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Major problems currently limiting the widespread application of phthalonitrile resins are the high precursor melting point and volatility of the curing agent. Herein, a novel self-curing triphenol A-based phthalonitrile resin precursor (TPPA-Ph) was successfully synthesized by reacting α,α,α′-tris(4-hydroxyphenyl)-1-ethyl-4-isopropylbenzene (TPPA) with 4-nitrophthalonitrile (NPh) via nucleophilic substitution. The presence of residual phenolic hydroxyl groups in the TPPA-Ph precursor promoted the curing reaction of phthalonitrile resin in the absence of an additional curing reagent. Self-cured TPPA-Ph resins exhibited relatively low melting points (less than 100 °C), high thermal stability, and a wide processing window (116 °C). Furthermore, the TPPA-Ph precursors contained phenolic hydroxyl and cyano groups that can be used as flexibilizers and curing agents to optimize other phthalonitrile resins. Resorcinol-based phthalonitrile resin (DPPH) cured with various amounts of TPPA-Ph possessed excellent thermal and thermo-oxidative stability with a 5% weight loss temperature exceeding 530 °C, Tgs above 380 °C, and a wide processing window and time. Therefore, as a novel precursor and curing agent for phthalonitrile resins, the triphenol A-based phthalonitrile resin is an ideal resin matrix for high-performance composites with broad application prospects in aerospace, shipping, machinery, and other high-tech fields.
中文翻译：
自固化三酚 A 基邻苯二甲腈树脂前体作为邻苯二甲腈树脂的增韧剂和固化剂†
目前限制邻苯二甲腈树脂广泛应用的主要问题是固化剂的高前体熔点和挥发性。在此，通过α,α,α'-三（4-羟基苯基）-1-乙基-4-异丙基苯（TPPA）与4 -硝基邻苯二甲腈 (NPh)通过亲核取代。TPPA-Ph前体中残留酚羟基的存在促进了邻苯二甲腈树脂在没有额外固化剂的情况下的固化反应。自固化 TPPA-Ph 树脂具有相对较低的熔点（低于 100 °C）、较高的热稳定性和较宽的加工窗口（116 °C）。此外，TPPA-Ph 前体含有酚羟基和氰基，可用作增韧剂和固化剂，以优化其他邻苯二甲腈树脂。用不同量的 TPPA-Ph 固化的间苯二酚基邻苯二甲腈树脂（DPPH）具有优异的热稳定性和热氧化稳定性，5% 失重温度超过 530 ℃，T gs 380℃以上，加工窗口和时间宽。因此，作为新型邻苯二甲腈树脂的前驱体和固化剂，三酚A基邻苯二甲腈树脂是一种理想的高性能复合材料树脂基体，在航空航天、船舶、机械等高新技术领域具有广阔的应用前景。
更新日期：2018-09-24
中文翻译：
自固化三酚 A 基邻苯二甲腈树脂前体作为邻苯二甲腈树脂的增韧剂和固化剂†
目前限制邻苯二甲腈树脂广泛应用的主要问题是固化剂的高前体熔点和挥发性。在此，通过α,α,α'-三（4-羟基苯基）-1-乙基-4-异丙基苯（TPPA）与4 -硝基邻苯二甲腈 (NPh)通过亲核取代。TPPA-Ph前体中残留酚羟基的存在促进了邻苯二甲腈树脂在没有额外固化剂的情况下的固化反应。自固化 TPPA-Ph 树脂具有相对较低的熔点（低于 100 °C）、较高的热稳定性和较宽的加工窗口（116 °C）。此外，TPPA-Ph 前体含有酚羟基和氰基，可用作增韧剂和固化剂，以优化其他邻苯二甲腈树脂。用不同量的 TPPA-Ph 固化的间苯二酚基邻苯二甲腈树脂（DPPH）具有优异的热稳定性和热氧化稳定性，5% 失重温度超过 530 ℃，T gs 380℃以上，加工窗口和时间宽。因此，作为新型邻苯二甲腈树脂的前驱体和固化剂，三酚A基邻苯二甲腈树脂是一种理想的高性能复合材料树脂基体，在航空航天、船舶、机械等高新技术领域具有广阔的应用前景。
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