TPI的门尼粘度对NR/TPI减震制品性能的影响

Effect of Mooney Viscosity of TPI on Properties of NR/TPI Damping Products

研究反式异戊橡胶(TPI)的门尼粘度对天然橡胶(NR)/TPI减震性能的影响。结果表明:与NR硫化胶相比,NR/TPI硫化胶的硬度增大,拉伸性能和抗撕裂性能降低,压缩永久变形减小,在-30,23和70℃下的耐屈挠龟裂性能提高,但在100℃×48 h热老化后23℃下的耐屈挠龟裂性能降低;随着TPI门尼粘度的提高,NR/TPI硫化胶的拉伸性能、撕裂强度和回弹值提高,静态压缩永久变形、动静刚度比和损耗因子减小,耐压缩疲劳性能以及在-30,23和70℃下的耐屈挠龟裂性能提高;高门尼粘度TPI在橡胶减震制品中的应用性能更优异。

The effects of Mooney viscosity of trans-1,4-polyisoprene(TPI)on the properties of natural rubber(NR)/TPI damping products were studied.The results showed that,compared with NR vulcanizate,the hardness of NR/TPI vulcanizates increased,the tensile properties,tear resistance and compression set decreased,and the flexural cracking resistance at-30,23 and 70℃ were improved,but the flexural cracking resistance at 23℃ after 100℃×48 h heat aging decreased.With the increase of the Mooney viscosity of TPI,the tensile properties,tear strength and rebound value of NR/TPI vulcanizates were gradually improved,the static compression set,dynamic static stiffness ratio and loss factor decreased,and the compression fatigue resistance and flexural cracking resistance at -30,23,and 70℃ were improved.TPI with high Mooney viscosity showed better application performance in rubber damping products.