膨胀型阻燃剂对硫化天然胶乳胶膜力学性能和阻燃性能的影响

以聚磷酸铵(APP)、季戊四醇(PER)和三聚氰铵(MEL)组成膨胀型阻燃体系(IFR),考察阻燃剂配比及用量对硫化天然胶乳力学性能和阻燃性能的影响,并通过热重分析仪分析其热稳定性、扫描电镜(SEM)分析阻燃剂在胶乳中的分散效果。结果表明,添加PER和MEL的硫化胶膜力学性能很好,但阻燃性能较差;添加APP和IFR的硫化胶膜力学性能较差,但是阻燃性能很好;SEM观察发现APP与橡胶相容性差;热失重分析可知,改性的硫化胶膜比未改性的硫化胶膜的阻燃性好,且IFR改性硫化胶膜的阻燃效果是最好。

Effect of ntumescent flame retardants on mechanical properties and flame-retarded properties of vulcanized natural rubber latex

The intumescent flame retardant system(IFR)was composed of ammonium polyphosphate(APP),pentaerythritol(PER)and melamine(MEL)to examine the ratio and the amount of flame retardant on the mechanical properties and flame retardant properties of vulcanized natural rubber latex.The thermal stability was analyzed by thermo gravimetric analyzer and the dispersing effect of flame retardant in latex was investigated by scanning electron microscopy(SEM).The results showed that the vulcanized latex film added PER and MEL had good mechanical properties but poor flame-resistance properties while the vulcanized latex film added APP and IFR had good flame-resistance properties but poor mechanical properties.SEM showed that APP had poor compatibility with the rubber.Thermal gravimetric analysis showed that the modified NR vulcanized latex film had better flame retardant properties than non-modified NR vulcanized latex film.The flame retardant effect of IFR-modified vulcanized latex film was the best.