酚醛树脂硫化丁腈橡胶的动力学

以氯化亚锡二水合物为活性剂制备了酚醛树脂(PF)硫化丁腈橡胶(NBR),考察了氯化亚锡二水合物对PF硫化NBR硫化特性的影响,并探讨了硫化机理。分别采用差减微分法(Freeman–Carroll)、Kissinger法和Ozawa法计算了硫化反应的动力学参数,建立了反应的自催化模型以及n级反应模型,得到了反应的动力学方程。结果表明,所建模型能够反映PF硫化NBR的反应过程,研究体系的n级动力学模型为dα/dt=1.7×10^16 e-133466(1-α)0.95。

Kinetics of phenolic resin vulcanized butadiene-acrylonitrile rubber

Phenolic resin(PF)-vulcanized butadiene-acrylonitrile rubber(NBR)was prepared with stannous chloride dihydrate(SnCl2·2H2O)as active agent.The effect of SnCl2·2H2O on the vulcanization characteristics of PF-vulcanized NBR was investigated and the vulcanization mechanism was discussed.The kinetic parameters of the vulcanization were calculated by Freeman-Carroll,Kissinger method and Ozawa method respectively.The autocatalytic model of the reaction and the n order reaction model were established,and the kinetic equation of the reaction was obtained.The results showed that the addition of SnCl2·2H2O reduced the activation energy of the reaction,which had a significant promotion effect on the vulcanization process,and kinetic model for PF-vulcanized NBR system was dα/dt=1.7×10^16e-133466(1-α)0.95.