抗硫化返原剂并用对NR性能的影响

Effect of the Combination of Anti-vulcanization Reversion Agent on the Properties of NR

研究了3种抗硫化返原剂多官能丙烯酸酯类化合物(SR534)、有机锌皂类(SL273)、二硫代硫酸钠盐(CSP8008)对NR抗硫化返原性能、硫化特性、力学性能的影响。结果表明,将抗硫化返原剂并用可大幅提高NR的抗硫化返原性能,且优于单独使用,其中SR534与CSP8008并用后,胶料的返原率(Rt)最低,150℃×60min后才出现硫化返原现象;3种抗硫化返原剂均能延长t90,影响t10和MH-ML,并用添加可减少SR534对胶料MH-ML的影响;3种抗硫化返原剂对胶料的力学性能影响较小,其中SR534与CSP8008并用,NR胶料的综合性能相对较好。

The application of three anti-reversion agent SR534,SL273 and CSP8008 in the NR composites and the effect on the anti-reversion property,vulcanizing behavior,mechanical properties were investigated.The results showed that the anti-reversion property of NR was improved greatly by the combined use of anti-reversion agents,and superior than single use.The combination of SR534 and CSP8008 had the lowest reversion rate(Rt)of the composite,the phenomenon of reversion of vulcanization did not occurr until 60 min at 150℃;The anti-reversion agent prolonged the T90,and the scorch time T10 and MH-ML was affected also,the influence on MH-ML were reduced by the combined use of anti-reversion agents.The mechanical properties showed that the anti-reversion agent had a small effect on the mechanical properties of the composites,the comprehensive mechanical properties of the NR composite were the best when SR534 and CSP8008 were used together.