氯化溴合成溴化聚苯乙烯

以氯化溴和聚苯乙烯为原料,以三氯化锑为催化剂,对合成阻燃剂溴化聚苯乙烯的工艺条件进行了试验研究。考察了催化剂添加量和反应温度对产物溴含量的影响,并对合成的溴化聚苯乙烯产品进行了溴含量、白度(Wb)、红外光谱和热重等测试。试验结果表明在催化剂添加量为3%~15%,反应温度为10~30℃的条件下,制备出的溴化聚苯乙烯产品溴含量大于65%,白度(Wb)大于70。热重分析表明制备的溴化聚苯乙烯具有较高的热稳定性。在上述工艺条件下进行了公斤级放大试验,实现了实验流程的连续稳定操作,验证了小试确定的工艺条件。

Synthesis of Brominated Polystyrene with Bromine Chloride

The optimal parameters of synthesizing brominated polystyrene （BPS） was determined in the presence of antimony chloride as a Lewis acid, bromine chloride and polystyrene as raw materials. The effects of the amount of catalyst and reaction temperature in the synthesizing process on the bromine content of product have been studied. Product qualities including bromine content and whiteness （Wb） have been examined. The results show that when the amount of catalyst is 3% --15% and the reaction temperature is 10--30℃ , the bromine content could be above 65% , whiteness （Wb） could be above 70. Ideal thermo stability and infrared spectrum were measured. The results of thermogravimetric and FTIR analysis show that the products have ideal thermo-stability and high quality. In addition, the optimal synthesizing parameters mentioned above were verified in a way of continuous and stable operation for kilo-scale process of synthesizing BPS.