首先通过苯基硫代磷酰二氯与3-氨丙基三乙氧基硅烷反应合成双(三乙氧基硅烷)苯基磷酰胺(BESPPA),然后采用紫外固化和硫醇-烯聚合制备了含阻燃剂、BESPPA和溶胶-凝胶前体的混合材料,以提高其热学和阻燃性能.热重分析表明在有机体系中加入溶胶-凝胶前体和BESPPA可以提高混合材料的热氧化稳定性;阻燃性能研究表明磷-硅对紫外固化混合材料的LOI增强和阻燃性提高具有协同作用,其LOI值从20.9升高到26.5;扫描电镜观察表明无机颗粒均匀地分散在有机基质中.

In this study,bis-(triethoxysilylpropyl)phenyl phosphamide(BESPPA)was synthesized by the reaction between dichlorophenyl phosphine oxide and 3-aminopropyltriethoxysilane.Flame retardant,BESPPA and sol gel precursor containing hybrid materials were prepared by thiol-ene polymerization with the aim to improve the thermal and flame retardant properties.Thermogravimetric analysis showed that the addition of sol-gel precursor and BESPPA into the organic network improved the thermal-oxidative stability of the hybrid materials.The phosphorus-silicon synergistic effect on LOI enhancement and increasing flame retardancy of the UV-cured hybrid materials were proved.An LOI enhancement from 20.9 to 26.5 was observed for organic resins containing both phosphorus and silicon.Scanning electron microscopy(SEM)studies indicated that inorganic particles were dispersed homogenously in the organic matrix.