【作者】 王付胜；

【导师】 黄宝琛；

【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】 反式-1,4-聚异戊二烯(TPI)是一种动态生热低、滚动阻力小、耐磨性能及动态疲劳性能优良的新型合成橡胶材料。针对其动态性能好的特点,研究了其在全钢子午线轮胎、空气弹簧等动态制品中的应用。 TPI与NR共混研究表明,TPI用量的增加会降低胶料强力性能,TPI的并用比例在20%(生胶质量比)左右时,并用胶综合性能较好。此时,硫化胶仍有较高的物理机械性能,而动态性能得以改善,胶料的滞后损失减小,滚动阻力和生热降低。 对NR/TPI(并用比80/20,下同)并用胶半有效硫化体系的研究表明,硫黄用量1.2-1.4份,促进剂NS用量1.4-1.6份为宜。此时可获得适宜的焦烧时间和硫化速度,硫化胶物理机械性能好,并具有较低的滚动阻力和压缩生热,较高的抗湿滑性和耐疲劳龟裂性。NR/TPI并用胶硫化体系中使用DTDM后,与硫黄/促进剂NS体系相比,硫化速度虽稍有降低,但胶料焦烧时间延长,加工安全性提高,硫化胶物理机械性能、疲劳性能、滚动阻力以及耐老化性能均得到改善,这与DTDM在NR中的应用相似。但与NR配方相比,NR/TPI并用体系中采用相对稍高的硫黄用量可获得较好的物理机械性能和动态性能。 对NR/TPI并用胶补强体系的研究表明,炭黑用量48份比较适宜,胶料撕裂强度大,疲劳生热性低,耐磨性较好,抗湿滑性与滚动阻力有较好平衡。补强体系中并用用白炭黑能改善胶料耐磨性、滚动阻力、压缩疲劳升热和抗湿滑性。但白炭黑胶料需要更长的混炼时间,硫化速度、拉伸强度、扯断伸长率、撕裂强度都有所下降,其用量不宜超过补强剂用量的50%。 为提高TPI的抗湿滑性及加工性能,研究了充油TPI。随充油量的增加,充油胶的物理机械下降,高门尼黏度TPI充油量以37.5份左右为宜,此时撕裂强度具有最佳值,充油45份以上的生胶存在喷油现象。充油胶的门尼黏度为50左右时,加工性能及硫化胶物理机械性能较好,硫化胶低滚动阻力、高抗湿滑性能得以协调。更多还原

【Abstract】 Trans-1,4-polyisoprene is a synthetic rubber with excellent dynamic performance. On the basis of dynamic performance, study of application of trans-1,4-polyisoprene in tire and air suspension products is made.NR/TPI blends with different TPI contents are researched. It is found that with increasing TPI contents, tensile performance decreased. Generally, a better comprehensive performance is obtained at about 20% of TPI contents. That is, the original excellent mechanical performance of NR blends are mainly conserved, while rolling resistance and compression heat build-up are improved.Study is made on Semi-Efficient Vulcanization (SEV) of NR/TPI(80/20), the results show that the best amount of sulfur is 1.2-1.4phr and that of accelerator NS is 1.4-1.6phr. Properly scorch time and vulcanization rate, excellent mechanical and dynamic performance are attained. The application of DTDM in vulcanization system of NR/TPI is researched. The results show that scorch time , mechanical and dynamic performance and aging resistance are better than that of sulfur and accelerator NS system. Contrast to NR formulation, an increasing in sulfur contents to some extent in NR/TPI formulation can improve physical mechanical property and dynamic performance.In NR/TPI system 48phr carbon black is optimum. On the basis of above results, precipitated silica and Si69 are introduced to NR/TPI blends. The results show that a suitable amount of silica and Si69 in blends can significantly improve abrasion resistance, rolling resistance, compression heat build-up and wet grip. But更多还原