偶联剂Si69原位改性白炭黑对SSBR胶料性能的影响

研究偶联剂Si69原位改性白炭黑对SSBR胶料性能的影响。结果表明，偶联剂Si69原位改性白炭黑可以降低SSBR混炼胶的门尼粘度，减弱混炼胶的Payne效应，改善混炼胶的加工性能；其在SSBR硫化胶中的分散度提高，且分散均匀，可以降低硫化胶的邵尔A型硬度，提高硫化胶的300％定伸应力。动态粘弹性能分析表明，偶联剂Si69原位改性白炭黑可降低60 ℃下、多次应变及大应变、宽频率范围内SSBR硫化胶的滞后损失。动态热力学分析表明，偶联剂Si69原位改性白炭黑可以提高SSBR硫化胶在0 ℃左右的损耗因子，从而提高胶料的抗湿滑性能。;The influence of in-situ modification of silica with coupling agent Si69 on the properties of solution SBR was investigated.The results showed that in-situ modification of silica with coupling agent Si69 could decrease Mooney viscosity and Payne effect of SSBR compound，and improve its processing properties；the dispersion degree and uniformity of silica in SSBR vulcanizate were improved；Shore A hardness of the vulcanizate was decreased and stress at 300% elongation increased.RPA analysis indicated that in-situ modification of silica with coupling agent Si69 could decrease tanδ of SSBR compound at the condition of 60 ℃，multiple strains and large strains and wide range of frequency.DTMA results showed that in-situ modification of silica with coupling agent Si69 could increase tanδ of SSBR vulcanizate at 0 ℃，and thus increase the wet skid resistance of the composites