The proposed damage competition group criterion ( D a) is applied to discuss the effect of morphology parameters and interfacial adhesion on brittle ductile transition ( BDT ) of polymer blends.

• 应用前文提出的聚合物共混体脆韧转变（BDT）的损伤竞争准数（Da）判据，研究了共混体分散相形态与界面粘接对BDT的影响。