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Investigation of the micromechanical deformation behavior of transparent toughened poly(methylmethacrylate) modified with core–shell particles

✍ Scribed by J. Laatsch; G.-M. Kim; G. H. Michler; T. Arndt; T. Süfke

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
311 KB
Volume
9
Category
Article
ISSN
1042-7147

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✦ Synopsis

The micromechanical deformation behavior of transparent rubber-toughened poly(methylmethacrylate) (RTPMMA) was investigated by electron microscopy. With increasing volume fraction of particles (from 4 vol% to 35 vol%) RTPMMA showed a transition of deformation mode from brittle to ductile. In both cases the particles deform through fibrillized cavitation processes. The dominant toughening mechanism in the specimen containing 4 vol% particles was multiple crazing triggered by fibrillized cavitated particles, whereas in the specimen with 35 vol% particles the specimen deformed by shear flow of matrix material between the fibrillized particles. From the results of an in situ deformation test in high-voltage electron microscopy it can be deduced that interparticle distance plays decisive role on the transition of deformation mode.

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