The recent progress and situation of study on the toughening mechanism of polymer toughened by rubber have been reviewed in this paper;especially the quantitative investigation on the brittle-ductile transition of polymer/rubber blends has been emphasized.Also the influences of the morphology parameters of rubber particles
the compatibility of the interface between the rubber particles and polymer matrix
the testing conditions of toughness and the properties of rubber and matrix on the toughness and toughening mechanism of rubber toughened polymers have been discussed in detail.Finally
the trends of toughening of polymer by rubber in the future have been suggested.