A novel triptycene-containing dioxazine benzoxazine monomer (TB-al) and a main-chain triptycene-containing dioxazine benzoxazine copolymer (poly(triptycene-containing dioxazine benzoxazine-co-polydimethylsiloxane), TB-al-co-PDMS) have been synthesized and fully characterized. Polymerization of the monomer, TB-al, and the copolymer, TB-al-co-PDMS, was studied by in situ FT-IR and DSC. Fire-related properties and thermal stability of the resulting thermosets were evaluated by TGA and micro-scale combustion calorimetry (MCC). The obtained thermosets, poly(TB-al) and poly(TB-al-co-PDMS), exhibit outstanding thermal stability with T_d10 values of 320 and 450 °C, char yields of 44 and 72% at 800 °C, low flammability as determined by HRC, affording values of 69.6 and 31.6 J g⁻¹ K⁻¹, and THR values of 10.5 and 9.4 kJ g⁻¹, respectively. Remarkably, poly(TB-al-co-PDMS) presents excellent dielectric performance with a dielectric constant of 2.37 at 1 MHz and good hydrophobicity revealed by the low water uptake value of 0.056% after 120 h of sample immersion in water at room temperature. The combined properties and advantages of these triptycene-based thermosets (poly(TB-al) and poly(TB-al-co-PDMS)) clearly indicate their great potential for applications in the field of high-performance polymers.

中文翻译：

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合成具有优异综合性能的含三蝶烯二恶嗪苯并恶嗪单体和主链三蝶烯-聚二甲基硅氧烷-苯并恶嗪共聚物

合成了一种新型含三蝶烯的二恶嗪苯并恶嗪单体 ( TB-al ) 和一种含三蝶烯主链的二恶嗪苯并恶嗪共聚物 (poly(triptycene-containing dioxazine benzoxazine- co - polydimethylsiloxane ), TB-al- co -PDMS)，并充分表征。通过原位FT-IR 和 DSC研究了单体TB-al和共聚物TB-al- co - PDMS的聚合。通过 TGA 和微型燃烧量热法 (MCC) 评估所得热固性材料的火灾相关特性和热稳定性。获得的热固性材料poly(TB-al)和poly(TB- al- co-PDMS)，表现出出色的热稳定性，T _d10值为 320 和 450 °C，800 °C 下的炭产率为 44% 和 72%，由 HRC 测定的低可燃性，提供值 69.6 和 31.6 J g ^-1 K ^{- 1}和 THR 值分别为 10.5 和 9.4 kJ g ^-1。值得注意的是，聚 (TB-al- co - PDMS)表现出优异的介电性能，在 1 MHz 下的介电常数为 2.37，并且在室温下将样品浸入水中 120 小时后，其吸水率低至 0.056%，显示出良好的疏水性。这些基于三蝶烯的热固性材料（poly(TB-al)和poly(TB-al-co -PDMS) ) 清楚地表明它们在高性能聚合物领域的应用潜力巨大。