Influence of biomass on the curing of novolac-composites

 
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1996 (EN)
Influence of biomass on the curing of novolac-composites (EN)

Karagiannis, K (EN)
Simitzis, J (EN)
Zoumpoulakis, L (EN)

N/A (EN)

Novolac resin (N) was cured with hexamethylenetetramine (hexa) without or with biomass (B). The agricultural/industrial by-product of olive stones was used as biomass. The curing was followed by DSC and i.r.-spectroscopy and the kinetic of curing was performed based on DSC scans. For the cured composites having high amounts of hexa (28.6%), the characteristic peaks of hexa were present, whereas for the material having low amounts of hexa (10%) these peaks disappeared. The composites containing high proportions of novolac (N = 70%) exhibit the same values of the enthalpy changes Delta H and Delta H-m, the latter calculated from the law of mixtures, whereas the composites with high proportion of biomass (B = 30%) show different values of Delta H and Delta H-m. The kinetic parameters of activation energy E and frequency factor k(o) of the total curing reaction of novolac with hexa are almost the same for high amounts of hexa (20%, 28.6%) but are slightly increased with decreased amounts of hexa (10%, 5%). The incorporation of biomass in the mass of novolac-hexa leads to an increase of E and k(o). Generally, the curing reaction for all materials is a first order reaction. Copyright (C) 1996 Elsevier Science Ltd (EN)

journalArticle

DSC (EN)
Activation Energy (EN)
EPOXY LIGNIN POLYBLENDS (EN)
COCONUT HUSK LIGNIN (EN)
Kinetics (EN)
First Order (EN)
PARAMETERS (EN)
Kinetic Parameter (EN)
RESINS (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

European Polymer Journal (EN)

English

1996


PERGAMON-ELSEVIER SCIENCE LTD (EN)



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