INVESTIGADORES
ARANGUREN Mirta Ines
artículos
Título:
Composites from PMMA Modified Thermosets and Woodflour
Autor/es:
B. A. ACHA; M. I. ARANGUREN; N. E. MARCOVICH; M.M. REBOREDO
Revista:
POLYMER ENGINEERING AND SCIENCE
Editorial:
Wiley
Referencias:
Lugar: new York; Año: 2003 vol. 43 p. 999 - 1010
ISSN:
0032-3888
Resumen:
The mechanical behavior of composites made from woodflour and a modified
thermoset unsaturated polyester resin has been examined. Polymethylmethacrylate
(PMMA), a common low profile additive (LPA), was used as the matrix modifier.
Woodflour, the reinforcing filler, was used as received and was also modified with
a commercial alkenyl succinic anhydride (ASA), in order to enhance the compatibility
with the resin. The composites exhibited higher flexural and compressive modulus
and compressive yield stress than the neat resin, while flexural strength and ultimate
strain were reduced. The addition of PMMA to the unfilled thermoset led to a
LPA morphology and decreased the flexural modulus, but produced an increment
in flexural strain at break, impact energy and toughness of the UP resin. No enhancement
in the mechanical behavior of the composites was found when treated
woodflour instead of unmodified woodflour was used.