I. Segall et al., CORE-SHELL STRUCTURED LATEX-PARTICLES .3. STRUCTURE-PROPERTIES RELATIONSHIP IN TOUGHENING OF POLYCARBONATE WITH POLY(N-BUTYL ACRYLATE) POLY(BENZYL METHACRYLATE-STYRENE) STRUCTURED LATEX-PARTICLES/, Journal of applied polymer science, 58(2), 1995, pp. 419-425
The performance of the designed structured core-shell latex particles
in toughening polycarbonate (PC) matrix was examined. Izod impact test
ing of the PC-core-shell latex blends were used to evaluate the influe
nce of parameters related to the core-shell latex particles on toughen
ing polycarbonate. Among these parameters are the particle size and le
vels of crosslinking of the core rubber particles, composition and mol
ecular weight of the shell polymer, and weight ratio of shell to core
polymers as well as the particle morphology. In this work, core-shell
structured latex particles with thinner shells of higher molecular wei
ght polymers were found to improve the impact resistance of polycarbon
ate. The role of chain entanglements in increased adhesion between the
discrete rubbery phase and the continuous glassy matrix and the impor
tance of surface-to-surface interparticle distance for toughening at v
arious temperatures are discussed. (C) 1995 John Wiley & Sons, Inc.