Research on Non-elastomer Toughening System

Two important mechanical properties of polymer materials are as follows.

Strength -- mechanical properties of engineering materials that resist fracture and excessive deformation;

Toughness -- the ability of a material to absorb energy during plastic deformation and fracture.

The study of polymer mechanical properties is an important subject. At present, the commonly used toughening modification system is rubber elastomerdispersion and matrix toughening. The increase in toughness while the decrease in rigidity are defects that the system is difficult to overcome. Therefore, the research of rigid particle toughening system taking place of rubber toughening system has been developed.

In the past decades, rubber elastomers toughening mechanism did a lot of work and put forward many theories: impact damage when rubber absorbing energy was 10%. Rubber as an example, in the plastic matrix as a stress concentration point, the shear yielding and silver streaking of the matrix cause the matrix to undergo brittle-ductile transition. Plastic absorb energy of the matrix itself. At present, there is a suitable toughening range for non-elastomer toughening system. The good liquidity also the modulus, strength and heat distortion temperature of the material are maintained while increasing the toughness. Different from the rubber elastomer toughening system, the former absorbs energy by plastic deformation under the action of matrix stress.