Abstract: The author adopted Monte Carlo method to simulate the linear polymer chain lattice model, and made a research on the variation of polymer dynamic behavior with the interaction energy changing among the system components. The author discussed the changes of physical parameters that describe chain dynamics g_cm(t), g_m(t), g_e(t) and g_r(t) with the increase of the interaction energy ε_PS between solvent molecules and polymer chain segment molecules, and interaction energy ε_PP among polymer chain segment molecules. The results indicate that ε_PP has less impact on polymer dynamic behavior than ε_PS, but the tangling character of the system is mainly affected by the chain length of the system， does not depend on the change of ε_PS and ε_PP absolutely.

Key words: polymer chain, dynamic behavior, Monte Carlo simulation