Self-healable polymer networks based on the cross-linking of epoxidised soybean oil by an aqueous citric acid solution

Literature Information

Publication Date 2013-09-09
DOI 10.1039/C3GC41384E
Impact Factor 10.182
Authors

Facundo I. Altuna, Valeria Pettarin, Roberto J. J. Williams


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Abstract

Epoxidised soybean oil (ESO) was cross-linked with an aqueous citric acid (CA) solution without the addition of any other catalyst or solvent. Completely bio-based polymer networks were generated. The initial system was an emulsion, but it became a homogeneous and transparent polymer network by reaction. The ability of the final materials to self-heal without adding extrinsic catalysts was assessed by stress relaxation and lap-shear tests. This was achieved by molecular rearrangements produced by thermally activated transesterification reactions of β-hydroxyester groups generated in the polymerization reaction.

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