Internal stress of epoxy resin modified with acrylic core‐shell particles prepared by seeded emulsion polymerization

Abstract

SynopsisIn order to reduce the internal stress in a cured epoxy resin, the submicron polymer particles were dispersed therein prior to curing. For this purpose, four kinds of poly(buty1 acrylate)/ poly(methy1 methacrylate) core-shell particles were prepared by seeded emulsion polymerization for methyl methacrylate with poly(buty1 acrylate) seed particles having different particle diameter, and subsequently were powdered by drying at room temperature. It was observed by SEM that poly(buty1 acrylate) particles as core were dispersed in the cured epoxy matrix. Poly(methy1 methacrylate) as shell seems to dissolve in the matrix. The internal stress of cured epoxy resin decreased with the modification of the particles and the tendency was enhanced with a decreasing in the particle diameter.

Rubber toughened epoxy

“…These problems can be minimized by using insoluble preformed particle directly. [80][81][82][83][84] Since the size, morphology and composition, shell thickness and crosslink density of the rubbery cores can be controlled separately by employing emulsion polymerization techniques, the effects of various parameters on the toughening of epoxies can be investigated. The control of the particle parameters by emulsion polymerization has been extensively studied, and various efficient technologies have been developed.…”

Effect of particle size on mechanical properties of epoxy resin filled with angular‐shaped silica

“…In a series of our investigations, [1][2][3][4][5][6][7] the effects of the morphology of cured epoxy resin with a two-phase structure on its properties were studied.…”

Controlled/living heterogeneous radical polymerization in supercritical carbon dioxide

“…[117][118][119][120][121][122] The particle morphology is either thermodynamically [123][124][125][126][127] or kinetically [128][129][130][131] controlled-thermodynamic factors favor the morphology with the lowest free energy (as determined by the interfacial tensions between the polymer/polymer phases and the continuous medium/polymers), whereas the kinetically controlled morphology is obtained when kinetic factors prevent the equilibrium morphology from forming. Morphological aspects of CLRP in dispersed systems have recently been reviewed.…”