Issue 7, 2015

New insights into the curing of epoxidized linseed oil with dicarboxylic acids

Abstract

The effect of systematically increasing chain length of a series of linear α,ω-dicarboxylic acids (DCAs) from C6 to C18 diacids and a cyclic diacid, Pripol 1009F, on thermal and mechanical properties of the resultant epoxy thermosets derived from epoxidized linseed oil (ELO) are reported. Different techniques including differential scanning calorimetry (DSC), solvent extraction, FT-IR, NMR, dynamic mechanical analysis (DMA), tensile tests and thermogravimetric analysis (TGA) are used in this study. The results indicated that the obtained epoxy resins were highly crosslinked polymers with only a small fraction of low molecular weight soluble materials. The glass transition temperature (Tg), tensile strength, Young's modulus, elongation at break and toughness decreased while the thermal stability increased with respect to increasing chain length of DCAs. Interestingly, strain hardening was only observed for adipic acid (C6) sample for which the best mechanical properties observed.

Graphical abstract: New insights into the curing of epoxidized linseed oil with dicarboxylic acids

Supplementary files

Article information

Article type
Paper
Submitted
29 Apr 2015
Accepted
03 Jun 2015
First published
03 Jun 2015

Green Chem., 2015,17, 4000-4008

Author version available

New insights into the curing of epoxidized linseed oil with dicarboxylic acids

C. Ding, P. S. Shuttleworth, S. Makin, J. H. Clark and A. S. Matharu, Green Chem., 2015, 17, 4000 DOI: 10.1039/C5GC00912J

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