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Investigation of the micromechanical deformation behavior of transparent toughened poly(methylmethacrylate) modified with core–shell particles
Author(s) -
Laatsch J.,
Kim G.M.,
Michler G. H.,
Arndt T.,
Süfke T.
Publication year - 1998
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(1998100)9:10/11<716::aid-pat834>3.0.co;2-9
Subject(s) - crazing , materials science , composite material , deformation (meteorology) , volume fraction , brittleness , deformation mechanism , toughness , natural rubber , scanning electron microscope , cavitation , micromechanics , polymer , microstructure , physics , mechanics , composite number
Abstract 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. © 1998 John Wiley & Sons, Ltd.