磷酸三苯酯/锡酸锌对环氧树脂酸酐固化物的阻燃与抑烟性能研究

采用极限氧指数法,热重分析和烟密度测试法研究了磷酸三苯酯(TPP)、锡酸锌(ZS)在环氧树脂酸酐固化物(EP)中的阻燃作用和抑烟机理.研究表明TPP对EP具有良好的阻燃效果,并通过增加在高温下的热稳定性和降低热失重速率等在凝缩相和气相中发挥阻燃作用;TPP通过分解时形成的液态含磷物质吸附少量的烟尘.ZS的阻燃效果一般,它的用量为30份,其阻燃体系的最大烟密度值可降低至491.7,但降低了t16,TPP和ZS合用时具有一定的阻燃协同效应,但并不一定具有抑烟协同效应.

Effects of Triphenyl Phosphate and Zinc Stannate on the Flame Retardance and Smoke Suppression of Anhydride Cured Epoxy Resin

Flame retardance and smoke suppression mechanisms of triphenyl phosphate (TPP) and zinc stannate(ZS) alone and together in the anhydride cured epoxy resin(EP) were studied by limited oxygen index(LOI), thermogravimetry analysis(TGA) and NBS techniques. The results indicate that TPP alone is an effective fire retardant in EP, can stabilize EP at high temperature, and lowers the mass loss rate of EP. The mechanism of action of TPP in EP is the condensed-phase and gas phase. TPP alone is an effective smoke suppressant. Liquid phosphorus-containing compounds formed in the decomposition of TPP can adsorb the small amount of smoke particles. ZS is ineffective fire retardant in EP. At 30 phr, ZS can decrease the maximum smoke density of EP from 796.4 to 491.7. ZS can catalyze the thermal degradation of EP and prevent multicycloaromatic compounds being formed. But ZS can decrease the value of t (16). So ZS as a smoke suppress agent is not suitable to EP. The combination of TPP and ZS show the flame retardant synergism effect.