Multiple-Phase Toughening-Particle Morphology
1993; American Chemical Society; Linguagem: Inglês
10.1021/ba-1993-0233.ch003
ISSN0065-2393
AutoresPeter A. Lovell, James A. McDonald, D. Saunders, M. N. Sherratt, Robert J. Young,
Tópico(s)biodegradable polymer synthesis and properties
ResumoRubber-toughened poly(methyl methacrylate) (RTPMMA) materials were prepared by blending PMMA with multiple-phase toughening particles with radially alternating rubbery and glassy layers. The effects of particle morphology and rubbery-phase volume fraction on the tensile and fracture properties were evaluated. The principal mechanism of deformation operating in these materials, shear yielding with debonding and cavitation of the toughening particles, results in crack-tip blunting. The properties of the RTPMMA materials containing two-layer toughening particles are generally inferior to those containing three- or four-layer toughening particles.
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