硅橡胶协效阻燃热塑性聚烯烃弹性体复合材料的性能

Properties of Silicon Rubber Synergistic Flame Retardant TPO Composites

采用熔融法制备了一种阻燃、抗滴落热塑性聚烯烃弹性体(TPO)复合材料,探讨了硅橡胶与Mg(OH)2的协同阻燃与抗滴落作用。结果表明,当硅橡胶/Mg(OH)2为20/80时,复合材料的极限氧指数提高到31.6%,且熔融滴落现象明显改善;TG分析表明,硅橡胶的加入,使TPO/硅橡胶/Mg(OH)2复合材料的分解温度有所提高,热稳定性和抵抗热分解能力增强;燃烧炭层的FTIR分析表明,加入硅橡胶后,复合材料内Si—O键的数量明显增加,说明硅橡胶具有抗滴落作用。拉伸应力–应变行为研究表明,硅橡胶/Mg(OH)2为20/80时,复合材料的拉伸强度达到2.81 MPa,断裂伸长率达到343.3%。

Thermoplastic polyolefin elastomer（TPO） composites with flame retardant and anti-dripping were made with the way of melting. The effect of silicone rubber and Mg（OH）2 on the flame retardant and anti-dripping properties of the composites were discussed. When the silicone rubber/Mg（OH）2 is 20/80,the limiting oxygen index of the composites is reached to 31.6%, and the melting and dripping phenomenons are improved obviously. TG analysis show that with the adding of silicone rubber,the decomposition temperature is improved,the thermal stability and resistance to thermal decomposition ability enhance. FTIR analysis show that the number of Si—O structure is improved obviously,and further prove silicone rubber has the effect of anti-dripping. The study of behavior of stress and strain show the silicone rubber/Mg（OH）2 is 20/80,the tensile strength of the composite arrives 2.81 MPa,the elongation at break is up to 343.3%.