Synthesis and Thermal Cross-Linking Study of Partially-aminated Epoxidized Linseed Oil

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Universidad Autónoma del Estado de Hidalgo

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Department of Chemistry

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The reaction of diamines or triamines with epoxidized oils leads to different reactions of intra/intermolecular cross-linking and the disruption of the ester linkage. However, by controlling the reaction conditions of temperature, stoichiometry and catalyst, production of oxirane rings without cross-linking and/or disruption of ester group can be achieved. In this work, the synthesis of cross-linking aminated-epoxidized linseed oil resins in two stages is presented. The first one started with epoxidized linseed oil (55.4%) which was subjected to a partial aminolysis using three different amines (ethylenediamine, p-xylylenediamine and triethylenetetramine) and a ZnCl 2 catalyst. Products were characterized by FT-IR, 1H-NMR and DSC. In the second stage, the thermal cross-linking reaction (thermal cure) for obtaining cross-linked polymers was studied by calorimetry using isothermal experiments. These results were extrapolated for producing sheet molding thermally cross-linked polymers.


DOI: 10.1163/156855508X344952

Funding text

The authors acknowledge the Universidad Nacional Autónoma del Estado de Méx-ico for the support under the Projects 1981/2004B and 2056/2005A.