磷-氮系膨胀阻燃剂对聚丙烯性能的影响

对阻燃聚丙烯（PP）进行了力学性能测试，利用差示扫描量热仪、热失重分析仪、锥形量热仪和体视显微镜对阻燃PP的各项性能进行了进一步的表征。结果表明，随着磷-氮阻燃剂（IFR-3）用量的增大，PP的拉伸强度和冲击强度先增大后减小；阻燃剂IFR-3能使PP的熔融温度和结晶温度均提高，同时也使PP的分解温度降低，残余物增大；随着阻燃剂IFR-3用量的增大，PP的极限氧指数不断增大；当阻燃剂IFR-3用量为30份时，厚度为3.2 mm的PP试样垂直燃烧性能达到UL 94 V-0级，当阻燃剂IFR-3用量为35份时，厚度为1.6 mm的PP试样达到UL 94 V-0级；阻燃剂IFR-3能够显著降低PP的热释放速率和生烟速率。

Effects of Phosphor-nitrogen Intumescent Flame Retardant on the Flame Retardancy Performance of Polypropylene

In this paper, the flame retardancy and mechanical properties of polypropylene（PP）were tested by differential scanning calorimetry（DSC）,thermogracimetic analysis（TG）,cone calorimetry, and stereo microscope. It was found that as the content of IFR-3 increased, the tensile strength and charpy notch impact strength increased first, and then decreased; flame retardant IFR-3 increased the crystallization temperature and melt temperature, and decreased the decomposition temperature, increased the residual mass. The limiting oxygen index of PP increased with increasing content of flame retardant IFR-3. When IFR-3 was 30 and 35 phr, PP/IFR-3 specimen gave rise to a UL 94 V-0 rating at 3.2 and 1.6 mm, respectively. IFR-3 could also decreased the heat release rate（HRR）and smoke produce rate（SPR）of PP.