Researchers from Malaysia conducted an experiment to synthesize castor oil based polyurethane and analyse its potential application as a base material in polymer 
electrolytes. Castor oil polyols were synthesized and mixed with 4,4′-diphenylmethane diisocyanate to synthesize the desired biobased polyurethane.
Characteristic studies showed that the synthesized polyurethane had favourable properties and hence could be used as a base material in polymer electrolytes.