Properties of polyester varnish composites with organophilic clay
International Journal of Development Research
Properties of polyester varnish composites with organophilic clay
Received 02nd July, 2022; Received in revised form 14th July, 2022; Accepted 27th August, 2022; Published online 23rd September, 2022
Copyright © 2022, Bruno Sampaio Andrade et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In this work, a polyester-based electrical insulator varnish modified with soy oil was used to obtain composites by the incorporation of organophilic vermiculite (VMT-org). The dispersion of the VMT-org in the polymeric matrix was performed using an ultrasonic processor. Composites were produced with inorganic particle contents of 1, 3 and 5% (by weight of resin). TGA results showed no significant change in the thermal degradation temperatures. However, the incorporation reduced the maximum rate of degradation. The DSC results showed that the incorporation of VMT-org had two different states, caused by curing the varnish, resulting in two Tg values. The SEM observation showed good dispersion of inorganic particles. XRD analysis suggested that molecules of varnish were intercalated in the lamellae of VMT-org for the 1 and 5% composites, while the lamellae were exfoliated in the 3% composite.
