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Craze and crack growth were described on Mode I subcritical crack surface topologies formed in unplasticized and plasticized polyvinyl chloride) (PVC). Types of deformations and material separations were noted. Topologies also were examined for the effects of suppressing the secondary β relaxation process, which is a molecular motion in the PVC polymer chain. A crack surface feature formed by catastrophic crack velocities was discussed.
poly(vinyl chloride), craze, crack, subcritical velocity, fractography, crack surface topology, β, relaxation, crack nucleation, ductile-brittle transition, microvoid coalescence, plastic instability, fatigue (materials), crack propagation
Senior research scientist, Armstrong Cork Co. Research and Development Center, Lancaster, Pa.