本文目的在于探讨高分子共混相容体系在热诱导作用下发生相变过程大分子扩散机制。高分子二组元A和B,其聚合度分别为N_A和N_B,统计链段长度为a_A,a_B。高分子链扩散系数分别为D_A,D_B。设大分子链存在缠结,其两缠结点间的聚合度为N_(eA)和N_(eB)。组元A的体积分数为φ_A=φ,组元B的体积分数为φ_B=1-φ.我们考虑相变的线性理论。在热 The purpose of this paper is to investigate the mechanism of macromolecular diffusion during the phase transition of polymer blends with heat-induced compatibilization. Two polymer components A and B, the degree of polymerization were N_A and N_B, the statistical segment length a_A, a_B. Polymer chain diffusion coefficients were D_A, D_B. The existence of macromolecular chains entangled, the degree of polymerization between the two entangled nodes N_ (eA) and N_ (eB). The volume fraction of component A is φ_A = φ and the volume fraction of component B is φ_B = 1-φ. We consider the linear theory of phase transition. In heat