炭黑填充NR和S—SBR硫化胶动态性能及屈挠破坏性的研究

探讨炭黑种类及用量对天然橡胶（NR）和溶聚丁苯橡胶（S—SBR）硫化胶的耐屈挠破坏性及动态力学性能的影响。结果表明，随着炭黑N234、N330用量的增大，NR和S—SBR两种硫化胶的耐屈挠破坏性降低；随炭黑粒径增大，炭黑用量对两种硫化胶的耐疲劳破坏性的影响逐渐减小；NR硫化胶的耐初始疲劳破坏性明显优于S—SBR硫化胶，随屈挠次数的增加，两者间的差距逐渐减小。炭黑用量增加，NR和S—SBR硫化胶的损耗因子峰值（tanδmax）减小，高于10℃时（高弹态）的tanδ值增大，S—SBR较NR具有更好的抗湿滑性和相差无几的低滚动阻力。炭黑粒径减小，NR和S—SBR硫化胶的tanδmax减小，填充30质量份炭黑时，N660增强的两种硫化胶在0℃时tanδ值较高，60℃时最低，具有较好的动态性能。

Study on dynamic properties of NR and S-SBR vulcanizates

The effects of kinds and dosage of carbon black on bending destroyed durability and dynamic properties of NR and S-SBR vulcanizates were discussed. The results showed that bending destroyed durability of NR and S-SBR vulcanizates decreased with CB（N234, N330） dosage increasing, and the bigger of CB diameter, the smaller the effects of CB dosage on bending destroyed durability of NR and S-SBR vulcanizates. The initiative bending destroyed durability of NR was better obviously than that of S-SBR, while with bending times increasing, the gap of bending destroyed durability between NR and S-SBR was coming to go down. The higher the dosage of CB, the smaller the tan δmax of NR and S-SBR,the bigger the tan δ when temperature was beyond 10 ℃ （rubber state）. Wet-skid resistance of S-SBR was better than that of NR, rolling resistance of NR and S-SBR were almost the same. The smaller the diameter, the smaller the tan δmax of NR and S-SBR. When CB dosage was 30 phr,NR or S-SBR vulcanizates filled with N660 had higher tang at 0 ℃ and the least tang at 60 ℃ ,so the two vulcanizates had Better dynamic properties.