Ye Neng, Wu Zhenya, Wu Xiaohui, Lu Yonglai, Zhang Liqun
State Key Laboratory of Organic-Inorganic Composites, Beijing 100029, China.
Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China.
Polymers (Basel). 2022 Jul 20;14(14):2928. doi: 10.3390/polym14142928.
Polymerized, functionalized solution styrene-butadiene rubber (F-SSBR) is a new type of polymerized styrene-butadiene rubber solution containing specific terminal groups, which can be used in treads for high performances. However, the wet skid resistance related to safety, the rolling resistance to energy consumption, and the wear resistance to service life are often contradictory and form the performance "magic triangle". In this work, oligomeric resins, including Coumarone resin, C resin, C/C resin and a styrene-α-methyl styrene copolymer (SSC), were used as tire functional additives and selected to replace treated distillate aromatic extract (TDAE) to improve the performances of silica-filled F-SSBR composites. The C resin, C/C resin and SSC could enhance the modulus at 300% and tensile strength of the F-SSBR composite. The four resins could improve the wet skid resistance and wear resistance of the composites. However, Coumarone resin caused poor silica dispersion in the F-SSBR matrix and eventually, the lower modulus, higher loss factor at 60 °C and the higher heat buildup in the composite were comparative to the composite with TDAE. Furthermore, the synergistic effect of the C/C resin and SSC was found to improve the mechanical performance of the composites and it resulted in higher tensile strength and modulus, and a lower heat buildup, compared to the case when only TDAE was used. It is noted that the properties "magic triangle" was broken by the C/C resin and SSC, and the C/C10T15 increased the wet skid resistance by 21.7%, fuel-saving rate by 2.3%, and wear resistance by 8.3%, while S20T5 increased the wet skid resistance by 30.4%, fuel-saving rate by 7%, and wear resistance by 25% compared with CG.
聚合官能化溶液丁苯橡胶（F-SSBR）是一种含有特定端基的新型聚合丁苯橡胶溶液，可用于高性能胎面。然而，与安全性相关的湿滑阻力、与能耗相关的滚动阻力以及与使用寿命相关的耐磨性往往相互矛盾，形成了性能“魔三角”。在本工作中，将包括香豆酮树脂、C树脂、C/C树脂和苯乙烯-α-甲基苯乙烯共聚物（SSC）在内的低聚物树脂用作轮胎功能添加剂，并选择其替代处理过的馏分芳烃抽提物（TDAE），以改善二氧化硅填充的F-SSBR复合材料的性能。C树脂、C/C树脂和SSC可提高F-SSBR复合材料的300%模量和拉伸强度。这四种树脂均可改善复合材料的湿滑阻力和耐磨性。然而，香豆酮树脂导致二氧化硅在F-SSBR基体中的分散性较差，最终，与含TDAE的复合材料相比，该复合材料的模量较低、60℃下的损耗因子较高且生热较高。此外，发现C/C树脂和SSC的协同效应可改善复合材料的力学性能，与仅使用TDAE的情况相比，其拉伸强度和模量更高，生热更低。值得注意的是，C/C树脂和SSC打破了性能“魔三角”，与CG相比，C/C10T15的湿滑阻力提高了21.7%，节油率提高了2.3%，耐磨性提高了8.3%，而S20T5的湿滑阻力提高了30.4%，节油率提高了7%，耐磨性提高了25%。
