拉伸疲劳过程中未填充丁苯橡胶/反式-1,4-聚异戊二烯共混硫化胶性能的变化  

Changes in properties of unfilled styrene-butadiene rubber/trans-1,4-polyisoprene vulcanizates during tensile fatigue

作　　者：张钰[1] 高文廷[1] 任佳帅[1] 杜爱华[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2013年第1期25-28,共4页China Synthetic Rubber Industry

基　　金：山东省教育厅资助项目(BS 2009 CL 024);国家自然科学基金资助项目(51073085)

摘　　要：研究了反式-1,4-聚异戊二烯(TPI)用量不同的未填充丁苯橡胶(SBR)/TPI共混硫化胶的拉伸疲劳性能,考察了TPI用量为20份(质量,下同)的未填充SBR/TPI共混硫化胶在拉伸疲劳过程中动态性能及TPI结晶性能的变化。结果表明,TPI用量为20份或30份时SBR/TPI共混硫化胶的拉伸疲劳性能较好,随TPI用量增加其疲劳断裂表面的撕裂线逐渐增多。X射线衍射分析表明SBR/TPI(质量比为80/20)共混硫化胶的结晶衍射峰强度随着拉伸疲劳次数的增加而不断增强。动态力学分析表明SBR与TPI的相容性良好;随拉伸疲劳次数增加SBR硫化胶损耗因子的峰值不断降低,而TPI用量为20份的SBR/TPI共混硫化胶在拉伸疲劳过程中损耗因子峰值的变化不明显,但损耗因子在40～60℃有较大幅度的下降。The tensile fatigue behavior of unfilled styrene- butadiene rubber （ SBR ）/trans-1,4-polyisoprene （ TPI ） vul- canizates were investigated, as well as the changes in dynam- ic mechanical properties and TPI crystallinity of SBR/TPI （mass ratio 80/20） vulcanizates at different fatigue cycles. The results showed that SBR/TPI （ mass ratio 80/20 or 70/ 30） vulcanizates had better tensile fatigue property. The tear lines on the fatigue fracture surfaces increased gradually with increasing TPI amount. X-ray diffraction analysis indicated that the crystal diffraction peak intensity of SBR/TPI （ massratio 80/20） vuleanizates enhanced continually with the in- creases of tensile fatigue cycles. Dynamic mechanical analysis exhibited that the compatibility between SBR and TPI was perfect, and the loss factor peaks intensity of SBR vulcanizate decreased significantly with the increase of fatigue cycles, while the SBR/TPI （mass ratio 80/20） vulcanizates unre- markablly, but decreased substantially at 40 - 60 ℃.

关 键 词：反式-1 4-聚异戊二烯 结晶性 丁苯橡胶 共混物 疲劳性能 动态力学性能 

分 类 号：TQ330.1[化学工程—橡胶工业]