JSME International Journal Series A Solid Mechanics and Material Engineering
Online ISSN : 1347-5363
Print ISSN : 1344-7912
ISSN-L : 1344-7912
Toughening Mechanisms of Rubber Toughened PMMA
Mitsugu TODOKiyoshi TAKAHASHIP.-Y. BEN JARPhilippe BEGUELIN
Author information
JOURNALS FREE ACCESS

1999 Volume 42 Issue 4 Pages 585-591

Details
Abstract

Toughening mechanisms of three types of rubber toughened poly(methyl methacrylate)(RT-PMMA) were investigated under mode I loading condition by optical and electron microscopies in conjunction with the quantitative evaluation of mode I fracture toughness. Polarizing optical microscopy clearly exhibited damage zone development ahead of a crack-tip in the RT-PMMA's. The three RT-PMMA's revealed different shapes of the damage zone. Transmission electron microscopy exhibited microcrazes generated in the equator of rubber particles within the damage zones. Extensive deformation of rubber particles corresponding to localized shear yielding of the PMMA matrix was also found in a region close to a propagating crack-tip. In addition, cavitation of rubber particles was observed in the vicinity of the crack. It is therefore understood that the toughening of the RT-PMMA's is due to energy dissipation caused by the microdamage formations such as microcrazing, matrix shear deformation and rubber particle cavitation ahead of the crack-tip.

Information related to the author
© The Japan Society of Mechanical Engineers
Previous article Next article
feedback
Top