Nondestructive method of evaluating the shock resistance of composite (polymer-polymer) materials

A study is made of the connection between the fracture toughness of shock-resistant polymeric composites based on polycarbonate, polybutyleneterephthalate, and an ABS-copolymer and parameters characterizing mechanical and electrical relaxation in the region of local molecular mobility. A method is proposed for determining shock characteristics a priori on the basis of the temperature-frequency dependences of the elastic modulus and mechanical loss modulus. The difference between the theoretical and experimental values of fracture toughness, measured within a broad range of temperatures, is no greater than 10-15%.