Dehydration condensation product (DHCP) was prepared by addition and dehydration condensation reactions of 9,10‐dihydro‐9‐oxa‐10‐phenanthrene‐10‐oxide (DOPO), vinyl trimethoxysilane, and (3‐aminopropyl) triethoxysilane. DHCP‐PA with high phosphorus content was prepared by reaction between DHCP and phytic acid (PA). It was then compounded with oxidized multi‐walled carbon nanotubes (OMWCNTs) to prepare silicone rubber (SR) flame retardant composites. The results showed that the SR with a small amount of DHCP‐PA owned good flame retardant effect. The heat release rate (HRR) was decreased from 436 kW/m² for pure SR to 288 kW/m² for the SR with 5 phr DHCP‐PA, and the decreasing degree was 33.9%. After mixing 5 phr DHCP‐PA with 1 phr OMWCNTs, the HRR of SR composite was decreased from 436 to 251 kW/m², the smoke production rate was decreased from 0.161 to 0.087 m²/s, the limited oxygen index value was increased from 20.4% to 28.4%, and the flame retardant grade can reach UL94 V‐0. In addition, the synergistic flame retardant mechanism was researched and analyzed.

中文翻译：

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新型协同阻燃剂的制备及其在硅橡胶复合材料中的应用

脱水缩合产物（DHCP）是通过9,10-二氢-9-氧杂-10-菲-10氧化物（DOPO），乙烯基三甲氧基硅烷和（3-氨基丙基）三乙氧基硅烷的加成和脱水缩合反应制得的。DHCP和植酸（PA）之间的反应可制得高磷含量的DHCP‐PA。然后将其与氧化的多壁碳纳米管（OMWCNT）混合以制备硅橡胶（SR）阻燃复合材料。结果表明，少量DHCP-PA的SR具有良好的阻燃效果。放热率（HRR）从纯SR的436 kW / m ²降至288 kW / m ²对于具有5 phr DHCP‐PA的SR，降低程度为33.9％。将5 phr DHCP‐PA与1 phr OMWCNTs混合后，SR复合材料的HRR从436降至251 kW / m ²，烟气产生速率从0.161降至0.087 m ² / s，极限氧指数值增加从20.4％到28.4％，阻燃等级可以达到UL94 V-0。此外，还研究了协同阻燃机理。