中文摘要：

通过熔融共混方法将高分子阻燃剂溴代聚苯乙烯（BPS）引入高抗冲聚苯乙烯（HIPS）树脂基体中得到二者的共混体系,再向此共混体系中引入适量三氧化二锑（AO）和硼酸锌（ZB）作为阻燃协效剂,分别用水平燃烧、垂直燃烧、氧指数和高温热分解实验研究了共混物的燃烧行为。结果表明：加入适量BPS时可以使共混物在空气中点燃后自熄且水平燃烧性能达到FH-1级,但单独使用BPS无法使共混物的垂直燃烧性能达到任何级别。AO和ZB与BPS之间均有非常显著的协同阻燃作用,同时加入AO和ZB会进一步提高共混物的氧指数,但ZB用量过多时共混物的垂直燃烧性能下降。共混物的阻燃机理主要为气相阻燃。

英文摘要：

The blend system was prepared by using melt blend method to introduce high molecular flame retardant brominated polystyrene （BPS） into high impact resilience polystyrene（HIPS） resin matrix, and then proper amount antimony oxide （AO） and zinc borate （ZB） were introduced into this blend system as flame retarding synergists. The combustion behavior of the blends was investigated by using horizontal burning, vertical burning, oxygen index and high temperature pyrolysis experiments. The results show that the blend can go out by itself after ignition in air and reach FH-1 degree of horizontal burning property by adding proper amount BPS, but the blends can not reach any degree of vertical burning property by using BPS alone. Both AO and ZB exhibit remarkable synergistic flame retarding effect with BPS, and simultaneous addition of AO and ZB can further increase oxygen indexes of the blends. However, the excessive ZB can decrease vertical burning properties of the blends. The flame retarding mechanism of the blends mainly is gas phase flame retarding.