溴/锑复配阻燃ABS体系的耐候性研究

采用十溴联苯醚和四溴双酚A与Sb₂O₃复配法制备了阻燃ABS共混物, 研究了采用受阻胺光稳定剂和苯并三唑类紫外光吸收剂对溴阻燃ABS耐紫外光老化性能的影响;TiO₂作为紫外线物理阻隔剂和屏蔽剂对溴阻燃ABS耐候性能的影响。结果表明, 采用四溴双酚A阻燃的ABS共混物具有较好的光稳定性; 通过物理的紫外线阻隔、屏蔽剂和化学的紫外线吸收剂和稳定剂的协同作用, 可使溴阻燃的ABS达到优异的耐紫外光老化性能 (300h氙灯老化的色差值由35.1下降到7.01) ,使材料在长期使用过程中, 保持优良的力学性能。

Study on the durability of bromine/antimony flame retarded ABS composites

Flame retarded ABS composites were prepared by compounding deca bromodiphenyl oxide (DBDPO), and tetra bromobisphenol A (TBBPA) with antimony oxide, respectively. The effect of hindered amine typed UV absorber and benzotriazole typed UV stabilizer on the durability of bromine/antimony flame retarded ABS composites was investigated. The influence of titanium dioxide (TiO 2), as UV absorber and separator, on the durability of ABS composites was also studied. It was found that the durability of flame retarded ABS by TBBPA became better than that by DBDPO, and the durability of bromine/antimony flame retarded ABS composites could be improved remarkably by the co ordinative effect of hindered amine typed UV absorber, benzotriazole typed UV stabilizer, and TiO 2.