INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Decorative Laminates Based on Phenolic Resins Modified with Sodium Lignosulfonate and Kraft Lignin. Synthesis, Characterization and Mathematical Modeling
Autor/es:
MARÍA EUGENIA TAVERNA; DIANA ESTENOZ; VERÓNICA NICOLAU
Reunión:
Conferencia; 253rd ACS National Meeting; 2017
Resumen:
In this work, technical lignins (sodium lignosulfonate and kraft lignin) were activated by hidroxymethylation and used to replace P in PF resins. The resins obtained were employed to produce decorative laminates.The work involved: i) the modification of sodium lignosulfonate and kraft lignin from hardwood, by hydroxymethylation at different temperatures (40, 50 and 70 ºC) and pH (9 y12); ii) the characterization of the hydroxymethylation by spectroscopic and volumetric analysis; iii) the development of a mathematical modeling of hydroxymetilation of sodium lgnosulfonate and the estimation of kinetic constants of reactions; iv) the synthesis of industrial traditional and modified PF resins by replacement of 10, 20 and 30%w/w of P, v) the production of laminates and their characterization including dynamic mechanical analysis used to compare conditions of curing and the determination of tensile modulus, bending strenght, biaxial flexural impact strenght and Mode- I Interlaminar Fracture Toughness in both processing directions to evaluate the mechanical performance. In this work, the optimal conditions of hydroxymethylation were 50 ºC and pH