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Effect of Particle Size on the Plastic Zone Formation in Front of Mode I Crack in ABS Polymers

Published online by Cambridge University Press:  26 February 2011

Beta Y. Ni  and
J. C. M. Li
Beta Y. Ni
Affiliation:
Materials Science Program, Depaxtment of Mechanical Engineering, University of Rochcstcr, Rochester, NY 14627.
J. C. M. Li
Affiliation:
Materials Science Program, Depaxtment of Mechanical Engineering, University of Rochcstcr, Rochester, NY 14627.
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Abstract

Two different sizes (0.4 and 0.1 μm) of rubber particles (polybutadiene) are usually used to toughen the glassy SAN (styrene acrylonitrile) matrix in ABS copolymers. Experiments on a batch of specimens without the large particles confirmedour previous contention that cavitation of large particles within a zone of cardioid shape is an important part of crack tip plasticity which protects the crack tip from the applied stress field. Large rubber particles require a less strong applied stress field than small rubber particles to initiate crazes so that the large rubber particles help avoid brittlefracture which occurs without crazes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 209: Symposium K – Defects in Materials , 1990 , 317
Copyright
Copyright © Materials Research Society 1991

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