关键词:

固相接枝, 丙烯酸, 聚丙烯, 接枝机理, 动力学模型

Abstract: Based on the assumption that single radical termination is the main way of termination reaction of radical solid phase graft polymerization, the graft polymerization mechanism and the graft polymerization rate model were proposed. The expression of grafting rate model is Rp,g＝Aexp（－E_a/RT）［I］［M］^α.The rate of graft polymerization was found to depend on initiator and monomer concentration to the 1st and less than 1st order respectively, and the actual rate constant of graft polymerization was found to obey the Arrhenius law. The effects of graft polymerization temperature and the concentration of initiator and monomer on the initial rate of graft polymerization were investigated in experiments. The relationship between initial rate of graft polymerization and the factors mentioned above coincided with the grafting rate model quite well. The parameters of the model were obtained by the nonconstraint-nonlinear optimization method. The frequency factor was 6.868×10⁹,the apparent active energy was 58.89 kJ•mol^-1 and the exponential order of monomer concentration was 0.

Key words:

固相接枝, 丙烯酸, 聚丙烯, 接枝机理, 动力学模型