【作者】 程俊梅；

【导师】 张萍；

【作者基本信息】 青岛科技大学 ， 高分子化学与物理， 2005， 硕士

【摘要】 本文主要采用动态力学热分析仪（DMA）表征了炭黑、白炭黑、短纤维增强天然橡胶（NR）、溶聚丁苯橡胶（S-SBR）复合材料的动态力学性能,系统研究了增强材料种类和用量对其动态力学性能的影响,并考察其相关物理机械性能的变化。 炭黑（N234,N330,N660）增强NR和S-SBR时,炭黑的加入明显提高了NR尤其是S-SBR硫化胶的物理机械性能,其中,N330的综合性能较好;DMA测试结果显示,随着炭黑用量的增加或粒径的减小,硫化胶tan δ_max值减小,70℃的tan δ值增大。 白炭黑（Z125,Z1165,Z195）增强NR和S-SBR时,实验结果表明,白炭黑的加入提高了NR、S-SBR硫化胶的物理机械性能,其中,填充Z1165的NR和S-SBR橡胶具有较好的综合物理机械性能;白炭黑使NR的抗割口增长能力变差,而使S-SBR的抗割口增长能力大大改善。随着白炭黑用量的增加,硫化胶的tan δ_max降低,硫化胶在0℃和70℃下的tan δ值增大,NR填充胶的E′增大,但S-SBR增强胶的E′值变化不大;其中,Z1165增强NR和Z195增强S-SBR的动态力学性能较好;在比表面积相近的情况下,Z125与N234相比,NR和S-SBR中加入Z125使其0℃和70℃下的tan δ降低,低于25℃时的E′值增大而高于此温度时的E′减小。 对短纤维-橡胶复合材料（SFRC）体系,实验结果表明,预处理短纤维部分取代炭黑后,平行于压延方向取向的短纤维能较大幅度提高S-SBR的抗撕裂性能、低伸长下的定伸应力和硬度,E′显著增高,0℃下的tan δ相差不大,70℃下的tan δ却明显减小;随短纤维用量的增加,预处理尼龙-丁苯橡胶的E′和tan δ增大,预处理聚酯-丁苯橡胶的E′增大而tan δ变化不大;预处理尼龙短纤维-丁苯橡胶的E（?）随温度的升高迅速下降,而聚酯短纤维-丁苯橡胶的E□受温度更多还原

【Abstract】 Dynamic mechanical analysis （DMA） was employed to estimate dynamic mechanical properites of NR、 S-SBR composites reinforced by CB, silica and short fiber, study the effects of reinforced materials’ kinds and contents on dynamic mechanical properties of NR and S-SBR composites, related physical mechanical properies were investigated also.To Carbon black （CB） （N234, N330, N660） reinforced NR and S-SBR, physical mechanical properies of NR, especially S-SBR were improved evidently by the adding of CB, thereinto, the general properties of vulcanizates reinforced N330 were better. DMA estimating results revealed that tan δ_max of vulcanizates reduced along with the content of CB increased or the diameter of CB decreased, but tan δ at 70℃ increased.Experiments results revealed that physical mechanical properies of NR, S-SBR were improved evidently by the adding of silica （ Z125, Z1165MP, Z195）, thereinto, the general physical mechanical properties of vulcanizates reinforced Z 1165MP were better.The gape expanding abilities of NR was improved by adding silica, however, S-SBR’s was controled greatly. Experiments results revealed that with the silica content increasing, tan δ_max of vulcanizates minished, tan δ at 0℃ and 70 ℃ increased, E’ of NR vulcanizates increased also, and E’ of S-SBR vulcanizates changed little. Thereinto, NR filled Z1165 and S-SBR filled Z195 had better dynamic mechanical properties. With similar CTAB, contrast with N234, NR and S-SBR filled Z125 had lower tan 6 both at 0℃ and 70℃, and had smaller E’ when the temperature was below 25 ℃ but bigger E’ when it beyond 25℃.To short fiber-rubber composite （SFRC） system, experiment results revealed that after CB was replaced partly by silica, short fiber which in the parallel direction更多还原