The styrene-butadiene rubber ( SBR ) / boehmite( BM) composites were prepared by directly blending. The effects of BM content and its surface modification with silane coupling agent bis-[γ-( trie-thoxysilyl) -propyl ] -tetrasulfide (Si 69 ) on mechanical properties, micro morphology, curing characteristics and dynamic mechanical properties of the composites were investigated. The results showed that BM could improve the mechanical properties of SBR vulcanizates effectively. The mechanical properties and interfacial bonding of SBR/BM composites could be further improved when BM was treated with Si 69. The scorching time and optimum curing timeof the two kinds of composites were shortened with increasing BM content at lower BM loading. Compared with the SBR/silica composites, SBR/BM composites exhibited higher mechanical loss in the low temperature range ( -20-0℃ ) and the SBR/ Si 69 modified BM exhibited lower mechanical loss in the high temperature range (50-70℃) when the filler content was the same.%采用动态硫化法制备了高密度聚乙烯(HDPE)/三元乙丙橡胶(EPDM)热塑性弹性体(TPV),并在基体中添加聚烯烃弹性体(POE)以改善其性能.对所制得的TPV的力学性能、微观相结构和动态黏弹行为进行了研究.结果表明,当HDPE/EPDM(质量比)为40/60时,HDPE/EPDM TPV表现出良好的综合性能；用POE取代其中的部分HDPE后,TPV的硬度和永久变形显著降低.EPDM以几微米到几十微米的粒子较为均匀地分散于树脂基体中；在基体中加入POE后,TPV的拉伸断面较为平滑,形变回复能力增强.随着扫描频率的增加,HDPE/POE/EPDM TPV的储能模量呈线性增长,损耗模量先升高后降低且在1.6 Hz附近出现最高值；增加TPV中POE的含量,其储能模量和损耗模量均明显降低.
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