刚–柔二嵌段共聚物的微观相分离是高分子和材料物理关心的重要问题。本文通过引入有限力程的相互作用形式，采用无规相近似数值求解系统的spinodal线来讨论刚–柔二嵌段共聚物的无序、有序转变。研究相互作用的力程和强度对无序、有序相转变点的影响。结果表明，随着相互作用的增强和相互作用力程的变长，体系的无序、有序相转变点升高。
Micro-phase separation of rod-coil diblock copolymer is one of the most important issues of polymeric and material physics. In present work, by introducing the interaction expression with finite interacting range, the micro phase separation of rod-coil diblock copolymer is investigated theoretically with random phase approximation. The numerical results indicate that the interacting range and the interacting parameter tend to stabilize the disordered phase.