Polymer composite systems

also termed as polymeric alloys

can provide a highly cost-effective way of creating novel materials with either characteristics of all the constituents or new desirable properties. The study of these systems is significant in polymer physics

polymer chemistry

material science and modern industrial applications

which leads to the result that multicomponent polymeric materials become the cutting edge of interdisciplinary scientific research. Due to their relatively simple structural features

homopolymer/diblock copolymer/homopolymer ternary materials provide a model system for studying some long-standing fundamental issues in polymer science and have potential engineering and functional applications. In recent years

this model system has been the subjects of extensive theoretical

experimental and simulation studies

and many important progresses have been achieved.However

related reviews about this field are still scarce.In this review article

we comprehensively describe the basic concepts and the development history in the field of polymer composite systems and highlight the effects of diblock copolymer compatibilizers on phase behaviors and interfacial properties of the ternary blends. In particular

the critical issues

development prospects

and research directions in this field are introduced as well.