多相高分子材料的结构与性能一直是高分子领域所关注的重要课题，材料的断裂机理与材料的断裂性能密切相关，是材料科学中最基础的科学问题之一，多年来，高分子物理尽管在描述形态形成和演化的机理有关的理论方面取得了很大的进展，但从结构到断裂性能仍缺乏相应的理论上的解决方案，因而造成人们对什么样的结构究竟会造成什么样的力学性能并不真正清楚，本项目利用申请人多年来在相场模型研究多相高分子材料形态演化的基础上，将相场模型进一步拓展到研究多相高分子材料的裂缝增长与断裂行为，将多相高分子材料的形态结构和断裂行为关联起来，这对高分子材料的结构和性能设计具有十分重要的意义。

The structure-property behavior of multi-component polymer material is one of the most important topics in polymer science. The fractue behaviors of materials are closlely related to fracture mechanisms of materials. The relationship between fracture mechanisms and fracture behaviors is the most basic problem in material science. For the past 20 years, great progress has been achieved in pattern formation of multi-phase polymer materials. However, there was still the lack of theoretical solution for describing polymer fracture. It is still not clear how the morphology affects the material property. Based on many years of research experience on phase separation dynamics of polymer materials, we try to extend phase-field model to crack propagation and fracture behavior of multi-phase polymer materials and connect the morphology with properties of multi-phase polymer materials really. We believe our studies are significant for sturcture and performance design in polymer materials.