全氟聚醚改性丁苯橡胶的制备及其性能研究
Preparation and Properties of Perfluoropolyether Modified Styrene Butadiene Rubber

第一部分选用全氟聚醚甲酯(PFPE-A)作为原料，用其与丁苯橡胶进行接枝得到(PFPE-A-SBR)，通过FT-IR、1H-NMR进行表征分析，PFPE-A成功与SBR进行接枝，然后将其作为一种改性剂，将其与SSBR共混，制备成氟改性SSBR硫化胶。通过调控不同投料比的全氟聚醚–丁苯改性剂(PFPE-A-SBR)，用于改性SSBR胶料，提升胶料的综合性能，结果表明：对SSBR的力学性能和静摩擦系数没有影响。PFPE-b-SBR可以改善SSBR的耐低温性，玻璃化转变温度升高约4℃，损耗因子的峰值提高了约14%。另外，一些微交联的PFPE-A-SBR在SSBR交联网络中起到良好的滑动作用，可以降低SSBR分子链之间的相互作用。
The first part selects perfluoropolyether methyl ester (PFPE-A) as the raw material, which is grafted with styrene butadiene rubber to obtain (PFPE-A-SBR). FT-IR and 1H-NMR characterization analysis show that PFPE-A is successfully grafted with SBR, and then used as a modifier to blend with SSBR to prepare fluorine modified SSBR vulcanized rubber. By adjusting the different feed ratios of perfluoropolyether butadiene styrene modifiers (PFPE-A-SBR) to modify SSBR rubber, the comprehensive performance of the rubber was improved. The results showed that it had no effect on the mechanical properties and static friction coefficient of SSBR. PFPE-b-SBR can improve the low temperature resistance of SSBR, with a glass transition temperature increase of about 4℃ and a peak loss factor increase of about 14%. In addition, some micro crosslinked PFPE-A-SBR play a good sliding role in the SSBR cross-linking network, which can reduce the interaction between SSBR molecular chains.