Rubber composition for tire sidewall, vulcanized rubber and preparation method and application of vulcanized rubber

The invention relates to the field of rubber, and discloses a rubber composition for a tire sidewall, vulcanized rubber as well as a preparation method and application of the vulcanized rubber. The rubber composition contains one or more of a rubber matrix, white carbon black, kaolin, a surface treating agent, an activating agent, an anti-aging agent, a softening agent, an anti-cracking agent, a tackifier, a vulcanizing agent, an accelerant and carbon black; wherein the rubber matrix contains butadiene rubber and/or natural rubber, the surface treating agent is silane-terminated polybutadiene, the number-average molecular weight Mn of the silane-terminated polybutadiene is 3000-4000, and the glass transition temperature Tg of the silane-terminated polybutadiene is less than or equal to-80 DEG C; the vulcanized rubber can further improve heat aging resistance and ultraviolet aging resistance on the premise of having basic mechanical properties and appearance. 本发明涉及橡胶领域，公开了一种轮胎胎侧用橡胶组合物和硫化橡胶及其制备方法以及应用。所述橡胶组合物含有橡