INVESTIGADORES
FRONTINI patricia Maria
artículos
Título:
Rubber-Modified Thermosets Cured in Heated Molds: Experimental Study of Phase Separation Profiles
Autor/es:
DONG PU FANG; PATRICIA M. FRONTINI ; CARMEN C. RICCARDI; ROBERTO J . J. WILLIAMS
Revista:
POLYMER ENGINEERING AND SCIENCE
Editorial:
JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 1995 p. 1359 - 1368
ISSN:
0032-3888
Resumen:
An epoxy-amine thermosetting polymer, modified by 15 wt% castor oil (CO) orby a commercial rubber (epoxy-terminated butadiene-acrylonitrile copolymer,ETBN), was cured in a mold at different heating rates. CO-modified materialscured at high heating rates exhibited a nonuniform phase separation profile, i.e. asingle-phase transparent core surrounded by opaque layers containing disperseddomains. The resulting structure was explained by simulating conversion vs.temperature trajectories taking place during the cure. Thermal and mechanicalproperties of uniform and nonuniform materials were compared. These includeglass transition temperature, microhardness, yield stress and yield strain inuniaxial compression, and fracture toughness. Some possibilities for further researchin this area are discussed.
