INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Synthesis and characterization of a waterborne polyurethane made from castor oil and tartaric acid
Autor/es:
MUCCI, VERÓNICA L.; ARANGUREN, MIRTA I.; HORMAIZTEGUI, M.E. VICTORIA
Revista:
EUROPEAN POLYMER JOURNAL
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2018 vol. 102 p. 151 - 160
ISSN:
0014-3057
Resumen:
Waterborne polyurethanes (WBPU) based on the reaction of unmodified castor oil(CO) with isophorone diisocyanate (IPDI) were synthesized using dimethylolpropionicacid (DMPA) or tartaric acid (TA) as internal emulsifiers. The effect of theincorporation of TA, a bio-based carboxylic acid, in the synthesis of castor oil-basedWBPU was carefully investigated. For comparison, two WBPUs were synthesizedusing DMPA. The chemical changes that took place during the reaction were followedusing FTIR. The raw materials and the final polymeric films were characterized by thistechnique as well as 1HNMR, XRD, DSC, DMA and TGA. Results indicated that inthe case of the sample prepared with TA, the isocyanate reacts with the hydroxyls ofthe acyl groups of the acid additionally to the alcoholic ones. In all cases, the filmsprepared by casting were translucent and showed glass transition temperatures aboveroom temperature, although comparatively lower for the WBPU formulated with TA.Differences were also observed in the thermal degradation performance of the films.The observed differences were tracked to those in the molecular structures of theWBPUs.