Flame retardant thermoplastic elastomer (TPE) with excellent mechanical properties and thermal oxidative aging resistance was prepared by dynamic vulcanization technology with ethylene-octene copolymer (POE) and polypropylene (PP) as raw materials. The paper first discussed the effect of the amount of vulcanizing agent on the properties of PP/POE TPE. Based on the study of tensile strength, elongation at break, cross-section morphology, processability and aging properties of TPE, it was found that the TPE prepared with 0.6 phr of bis(1-(tert-butylperoxy)-1-methylethyl)-benzene (BIPB) and 40/60 of PP/POE had the best properties. Then silicone powder (GM) is added to the traditional low-halogen bromine-phosphorus flame retardant system for flame retardant modification. The results show that the addition of GM can effectively enhance the stability of the carbon layer, prevent the material from dripping during combustion, and increase the residual carbon content of TPE at 800°C. When 3 phr of GM is combined with a bromine-phosphorus system. The comprehensive performance is the best, the limiting oxygen index (LOI) of TPE increased to 29.8%, reaching the V-0 level. At the same time, the processing fluidity and aging resistance of TPE materials have also been improved.

【摘要】：以乙烯-辛烯共聚物(POE)和聚丙烯(PP)为原料,采用动态硫化技术制备了具有优异力学性能和抗热氧化老化性能的阻燃热塑性弹性体(TPE)。论文首先讨论了硫化剂用量对PP/POE TPE性能的影响。基于对 TPE 的拉伸强度、断裂伸长率、截面形貌、加工性能和老化性能的研究，发现用 0.6 phr 双(1-(叔丁基过氧化)-1-甲基乙基)-制备的 TPE苯 (BIPB) 和 40/60 的 PP/POE 具有最好的性能。然后在传统的低卤溴磷阻燃体系中加入硅酮粉（GM）进行阻燃改性。结果表明，GM的加入可有效增强碳层的稳定性，防止材料燃烧时滴落，提高TPE在800℃时的残碳含量。当 3 份 GM 与溴-磷系统结合时。综合性能最好，TPE的极限氧指数（LOI）提高到29.8%，达到V-0级。同时，TPE材料的加工流动性和耐老化性也得到了提高。