溴系阻燃剂广泛应用于聚苯乙烯材料中,目前大部分小分子溴系阻燃剂已被禁用。高分子溴系阻燃剂由于分子量大而不易迁移,难以造成环境污染,已成为溴系阻燃剂的发展方向之一。通过丙烯酰氯与三溴乙醇的酯化合成了丙烯酸三溴乙酯(BBT),将BBT与2,4,6-三溴苯丙烯酸酯(TrA)共聚合成了脂肪族溴芳香族溴混合聚合物BCB。结果表明:BCB最佳合成条件是单体共聚比为1∶1,合成温度60℃,引发剂添加量为0.75%,反应时间为18h,此时各项性能到达最佳。研究发现BCB与三氧化二锑复配比例为3∶1,抗氧剂1010与Mg(OH)2添加量都为0.5%的BCB配方体系阻燃效果达到最大。人工加速老化测试中证明BCB不易析出,难以造成生物累积毒性。
Bromine-based flame retardants are widely used in polystyrene materials,but most of the small molecular bromine-based flame retardants have been banned.High molecular weight bromine-based flame retardants are difficult to migrate and cause environmental pollution,and have become one of the developing directions of bromine-based flame retardants.In this research,tribromoethyl acrylate (BBT) was synthesized by esterification of acryloyl chloride and tribromoethanol,and aliphatic bromine aromatic bromine mixed polymer (BCB) was synthesized by copolymerization of BBT and 2,4,6-tribromophenylacrylate (TrA).The results showed that the optimal synthesis conditions of BCB were a monomer copolymerization ratio of 1∶1,a synthesis temperature of 60℃,an initiator dosage of 0.75%,and a reaction time of 18h,yielding the best overall performance.It was found that the maximum flame retardant effect of the BCB formulation system was achieved with antimony trioxide ratio of 3∶1,antioxidant 1010 dosage of 0.5% and Mg(OH)2 dosage of 0.5%.BCB was difficult to precipitate and cause bioaccumulation toxicity in artificial accelerated aging test.
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基金资助
上海市科学技术委员会社会发展科技攻关项目(20dz1201100)
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