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Mechanical and Fracture Behavior of Rigid-Rod Self Reinforced Polymers

Mechanical and Fracture Behavior of Rigid-Rod Self Reinforced Polymers

Nick Malkovich and Romana Chavers (MPT),
Kevin Battjes and Robert Bubeck (MMI)

Abstract

Recently, a novel family of processable rigid-rod polyphenylenes with outstanding mechanical properties was introduced (Parmax® SRPs). These materials possess strength and stiffness superior to other thermoplastics while retaining reasonable notched Izod values (65 J/m). To understand this better, the mechanical behavior of these materials, focusing on fundamental fracture mechanisms, was investigated. The materials appear to generate weak crazes at crack tips combined with a multiplanar step-deflection mechanism for crazing/cracking behavior during the crack propagation stage. 

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