Herein, we fabricated a hybrid (mSiO₂@ZrPB) by modifying mesoporous silica (mSiO₂) with zirconium N,N′-piperazine (bismethylene phosphonate) (ZrPB) via a self-assembly method, and studied the effects of the combination between mSiO₂@ZrPB and 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phospha-phenantbrene-10-oxide (DOPO-HQ) on the curing behavior, flame retardancy, mechanical/thermal properties of epoxy/cyanate (EPCE) copolymer. The EPCE composite containing 8.0 wt% DOPO-HQ and 2.0 wt% mSiO₂@ZrPB reaches UL-94V-0 with the highest limiting oxygen index of 30.5%, and exhibits a reduction of 34.1% on the peak heat release rate and a reduction of 26.8% on the total heat release compared with pure EPCE. The flame-retardant mechanism is mainly attributed to the catalyzing carbonization effect of both DOPO-HQ and mSiO₂@ZrPB in the condensed phase. Moreover, the EPCE composites have improved thermal resistance (i.e., an increase in glass transition temperature). In addition, the tensile and impact strengths of the composite containing 9.0 wt% DOPO-HQ and 1.0 wt% mSiO₂@ZrPB are respectively increased by 19.1% and 18.9%, with respect to those of pure EPCE. Moreover, the EPCE composites exhibit excellent dielectric properties. Additionally, the curing and thermal-oxidative degradation behaviors of EPCE and its composites were investigated in more detail. The work provides a new strategy for preparation of EPCE composites with excellent comprehensive properties.

中文翻译：

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基于mSiO2@ZrPB和DOPO-HQ的环氧树脂/氰酸酯复合材料的阻燃性能、热性能和力学性能研究

在此，我们通过自组装方法用锆 N,N'-哌嗪（双亚甲基膦酸盐）(ZrPB)改性介孔二氧化硅 (mSiO _{2 ) 制备了杂化物 (mSiO 2} @ZrPB)，并研究了两者结合的效果mSiO ₂ @ZrPB 和 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phospha-phenantbrene-10-oxide (DOPO-HQ) 对环氧树脂固化行为、阻燃性、机械/热性能的影响/氰酸酯 (EPCE) 共聚物。_{含8.0 wt% DOPO-HQ和2.0 wt% mSiO 2}的EPCE复合材料@ZrPB达到UL-94V-0，最高极限氧指数为30.5%，与纯EPCE相比，峰值放热率降低34.1%，总放热降低26.8%。阻燃机理主要归因于DOPO-HQ和mSiO ₂ @ZrPB在凝聚相中的催化碳化作用。此外，EPCE 复合材料具有改进的耐热性（即玻璃化转变温度增加）。此外，含有 9.0 wt% DOPO-HQ 和 1.0 wt% mSiO _{2的复合材料的拉伸强度和冲击强度}@ZrPB 相对于纯 EPCE 分别提高了 19.1% 和 18.9%。此外，EPCE 复合材料表现出优异的介电性能。此外，还更详细地研究了 EPCE 及其复合材料的固化和热氧化降解行为。该工作为制备综合性能优异的EPCE复合材料提供了新的策略。