INVESTIGADORES
MANFREDI Liliana Beatriz
artículos
Título:
Thermal degradation and fire resistance of epoxy-amine-phenolic blends
Autor/es:
D.PUGLIA; L. B. MANFREDI; A. VÁZQUEZ; J.M.KENNY
Revista:
POLYMER DEGRADATION AND STABILITY
Editorial:
Elsevier Science Ltd
Referencias:
Lugar: Oxford; Año: 2001 vol. 73 p. 521 - 527
ISSN:
0141-3910
Resumen:
The effects of the addition of different epoxy resins on the thermal stability of phenolic resolees are reported. Blends of phenolic resins with different compositions of epoxy resins, cured with amine hardeners, were characterized by thermal gravimetric análisis and cone calorimetry to determine their thermal stability and fire resistance. The thermal degradation of phenolic resolees is characterized by a complex mechanism with at least two different processes which lead to the production of a stable and resistant char structure. On the other hand, the epoxy resins studied, either aliphatic or aromatic, degrade in a single step. The results demonstrate that the epoxyamine content should be kept under 15 wt.% to avoid a significant reduction of the thermal stability of the blend. However, blending with epoxyamines is a suitable route to improve the mechanical properties of phenolic resins or to reduce the cure temperature.
