滑石粉对阻燃聚碳酸酯性能的影响

Effect of Talc on Properties of Flame⁃retardant Polycarbonate

用滑石粉对钛白粉填充阻燃聚碳酸酯(PC)进行改性,研究了钛白粉以及滑石粉含量对阻燃PC的力学性能、阻燃性能、燃烧性能、热稳定性能以及抗老化性能的影响。结果表明,添加0.5%~2%(质量分数,下同)的滑石粉,阻燃PC的冲击强度下降了10%,阻燃等级由UL 94 V-1级变为V-0级,总热释放量下降了4~8 MJ/m^(2),初始分解温度提高了8~10℃;同时,滑石粉能够提高阻燃PC的耐热氧老化以及湿热老化能力。

Talc was used to modify the flame retardancy of polycarbonate(PC)filled with titanium dioxide.The effects of talc on the thermal stability,combustion and mechanical properties,flame retardancy and anti-aging performance of resultant PC compounds were investigated.The results indicated that the PC compounds presented a decrease in impact strength.With the addition of 0.5 wt%~2 wt%talc,the flame-retardancy of the compounds reached the UL 94 V-0 classification,the total heat release decreased by 4~8 MJ/m^(2),and the initial decomposition temperature increased by 8~10℃.Meanwhile,the compounds exhibited an improvement in the ability to resist the heat oxygen aging and damp heat aging in the presence of adding talc.