SciELO - Scientific Electronic Library Online

 
vol.26 número1Influencia de la temperatura en el hidrotratamiento de aceite crudo de palma usando catalizadores comerciales tipo NiMo/γ-Al2O3Biorefinería basada en microalgas: evaluación de métodos de extracción de aceite en términos de eficiencia, costos, toxicidad y energía a escala laboratorio índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Compartir


Revista ION

versión impresa ISSN 0120-100X

Resumen

FUENTES, Luis Enrique; RAMIREZ, Silvia Stella; COCONUBO, Angélica Liliana  y  RAMIREZ, Álvaro. Kinetic study of polyuretane syntesis produced from castor oil using Differential Scanning Calorimetry. Rev. ion [online]. 2013, vol.26, n.1, pp.15-26. ISSN 0120-100X.

This paper presents a study of the kinetics of polyurethane formation produced from castor oil and isophorone diisocyanate. The reaction rate was monitored by means of Differential Scanning Calorimetry (DSC). Three reaction models with their respective reaction rates were evaluated by comparison in representing experimental data of reaction rate. The model of order n and the auto catalytic were discharged for inconsistency with the bases of Arrhenius equation and for poor correlation with experimental data. A reaction model is proposed considering two resistances to reaction due to chemical and physical effects (diffusion) present in the polymerization of a poly functional monomer as in the case under study. This model faithfully represents the experimental data of reaction rate. Iso-conversion and nonlinear regression techniques were applied to calculate the kinetic parameters. A comparative analysis of the magnitude of the resistances allowed finding that diffusion is the major resistance during most of the conversion interval.

Palabras clave : kinetics; polyurethane; castor oil; diffusion resistance; chemical resistance; DSC.

        · resumen en Español     · texto en Español     · Español ( pdf )