【摘要】 采用动态硫化法制备丁基橡胶（IIR）/聚丙烯（PP）热塑性硫化胶（TPV），研究膨胀型石墨（EG）用量对IIR/PP TPV物理性能、结晶性能、耐热老化性能、微观形貌和阻燃性能的影响。结果表明：随着EG用量的增大，TPV的拉伸强度先增大后减小，当EG用量为20份时，TPV的物理性能较好；EG能够促进PP的结晶，提高TPV的玻璃化转变温度和结晶温度，对熔点影响不大；与未添加EG的TPV相比，添加EG的TPV的老化后拉伸强度保持率较高，阻燃性能较好；当EG用量小于40份时，EG较均匀地分散于TPV中，当EG用量为40份时，EG发生团聚。更多还原

【Abstract】 Butyl rubber(IIR)/Polypropylene(PP) thermoplastic vulcanizates(TPV) was prepared by dynamic vulcanization,and the effect of expanded graphite(EG) dosages on the physical properties,crystallization behavior,thermal aging resistance,microstructure and flame-retardant properties of IIR/PP TPV was investigated. The results showed that with the increase of EG dosage,the tensile strength of TPV first increased and then decreased. When EG dosage was 20 phr,the physical properties of TPV were optimal. EG could promote the crystallization of PP,leading to increases in the glass transition temperature and crystallization temperature of TPV,while having little effect on the melting temperature. Compared with TPV without EG,EG-filled TPV exhibited a higher retention of tensile strength after aging and improved flame-retardant properties. When EG dosage was less than 40 phr,EG was uniformly dispersed in TPV,whereas obvious aggregation of EG occurred when EG dosage was 40 phr.更多还原