Abstract

Polyaminopropylphenylsilsesquioxane (PA) was proved to be an effective fire retardant for epoxy resin (EP) by cone calorimeter measurements, since a significant peak heat release rate (PHRR) reduction of 42% was achieved from the EP/PA fire retardant epoxy (FREP) system relative to the pure EP. The thermal degradation behavior was investigated by thermogravimetric analysis (TGA) and the fire-retardant mechanism of the FREP system was studied by kinetics analysis methods, including the Kissinger method and the Flynn-Wall-Ozawa method. The calculated results of the Kissinger method showed that the activation energy of the FREP was slightly lower than that of pure EP. The Flynn-Wall-Ozawa method further revealed that the addition of the fire retardant PA increased the activation energies of FREP thermal degradation in the final stage, which illustrated that PA promoted the thermal degradation of EP in the early and middle stages and subsequently, stabilized the char residues and improved the fire retardancy of FREP in the thermal degradation process.

摘要

锥形量热法测量证明，聚氨基丙基苯基倍半硅氧烷（PA）是环氧树脂（EP）的有效阻燃剂，因为EP / PA阻燃环氧树脂（FREP）的峰值放热率（PHRR）降低了42％相对于纯EP的系统。通过热重分析（TGA）研究了热降解行为，并通过动力学分析方法（包括基辛格方法和Flynn-Wall-Ozawa方法）研究了FREP系统的阻燃机理。基辛格方法的计算结果表明，FREP的活化能比纯EP的活化能略低。Flynn-Wall-Ozawa方法进一步表明，阻燃剂PA的添加在最后阶段增加了FREP热降解的活化能，