INVESTIGADORES
ALVAREZ Vera Alejandra
artículos
Título:
Curing kinetics of epoxy / alkyl phosphonium modified nanoclay composites for high performance applications
Autor/es:
MARCELA ELISABETH PENOFF; ROMINA OLLIER; MATIAS LANFRANCONI; VERA ALVAREZ
Revista:
THERMOCHIMICA ACTA
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 608 p. 20 - 29
ISSN:
0040-6031
Resumen:
Alkyl phosphonium salts are novel and unexplored modifiers for polymer based composites which can improve the clays compatibility and dispersion in the polymer matrix. These salts can enhance the thermal stability of the modified clays, which is an indispensable requirement for thermosetting composites curing and processing occurring at high temperatures. In this work, a raw bentonite was ion exchanged with tributyl(hexadecyl) phosphonium bromide and then a novel epoxy/nanoclay composite was synthesized. The curing kinetics of the nanocomposites was studied. An extensively kinetic study was performed by FT-IR analysis and models accounting for many potential reactions and diffusion restrictions were proposed. A relationship between the H-bonding interactions and the kinetics was found. Also, the effect of the modifier of bentonite was found to affect the reaction yield