Results and discussion
Fundamentals of keto-hydrazide crosslinking
FTIR analysis revealed that 2-heptanone exhibits a strong carbonyl peak at 1710 cm–1 and octanoic hydrazide exhibits a strong band at 1628 cm–1 attributable to the amide carbonyl and N–H stretching. On reaction, it would be expected that the intensity of the ketone carbonyl and the N–H stretching and bending peaks would be reduced, as they are consumed during
crosslinking.