2002•Unpublished venueRequires access

Toughening Mechanism of Plastics

Hui Zhang

Abstract

Toughened PVC was prepared by blending PVC resin with low rubber content ABS resin. The toughening mechanism was studied by SEM, it was found that cavitation is formed in the stresswhitened area near the fracture surface. Therefore it is proposed that the toughening mechanism of PVC is cavitationinduced shear yielding. This mechanism can be explained by LudwikDavidenkovOrowan's brittletough transition theory and Orowan's notch effect theory. This toughening mechanism may be applicable to most kinds of toughened plastics. 

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Key concepts: Toughening, Materials science, Composite material, Brittleness, Cavitation, Natural rubber, Mechanism (biology), Brittle fracture