A novel tetrafunctional epoxy (TEPZ) was synthesized by “one spot two steps” method, and the effects of solvents, reaction temperature, and mole ratios of reactants on the reaction conversion were systematically investigated. The results demonstrated that the solvents participating in the reaction were the most crucial factor for high conversions. After curing, TEPZ/4,4′‐diaminodiphenyl sulfone (DDS) system exhibited better thermal stability compared with famous N,N,N′,N′‐tetraglycidyl‐4,4′‐diaminodiphenyl methane (TGDDM)/DDS analog. When TEPZ is blended with TGDDM/DDS, the initial decomposition temperature of TGDDM/TEPZ/DDS hybrid elevated from 348°C to 362°C. The storage modulus and the glass transition temperature were sensitive to curing procedure and concentration of DDS. While the system consisted of 100 phr TGDDM, 30 phr TEPZ, and 40 phr DDS, the storage modulus and glass transition temperature increased significantly compared with those of TGDDM/DDS, and the impact strength increased by 31.6% simultaneously. Such enhancement could be ascribed to the structural feature of phthalazinone in TEPZ, which formed stable interpenetrating networks during thermal cure procedure.

中文翻译：

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新型含酞嗪酮的四官能团环氧树脂：TGDDM体系的合成，表征及其增韧应用

通过“一点两步”法合成了新型四官能团环氧（TEPZ），系统地研究了溶剂，反应温度和反应物摩尔比对反应转化率的影响。结果表明，参与反应的溶剂是高转化率的最关键因素。固化后，与著名的N，N，N'，N'-四缩水甘油基-4,4'-二氨基二苯甲烷（TGDDM）/ DDS类似物相比，TEPZ / 4,4'-二氨基二苯砜（DDS）系统表现出更好的热稳定性。当TEPZ与TGDDM / DDS混合时，TGDDM / TEPZ / DDS杂化物的初始分解温度从348°C升高到362°C。储能模量和玻璃化转变温度对固化过程和DDS浓度敏感。该系统由100 phr TGDDM，30 phr TEPZ组成，与40 phr DDS相比，储能模量和玻璃化转变温度与TGDDM / DDS相比显着提高，并且冲击强度同时提高了31.6％。这种增强可以归因于TEPZ中酞嗪酮的结构特征，在热固​​化过程中形成了稳定的互穿网络。