LAUSR

Sustainable polyurethane dispersion with smart properties has enormous potential in the polymer industries because of its unique and environmentally friendly characteristics. Biodegradable water dispersion thermoplastic polyurethanes (WBPUs) with self-healing capability were synthesized, and they were water-dispersible after neutralization with triethylamine (TEA). The biobased macroglycol and chain extender were synthesized via the catalyst-based esterification reactions of dimer acid (DA), poly(ethylene glycol) (PEG-200), citric acid (CA), and glycerol. Three different compositions of WBPUs were synthesized by reacting poly(e-caprolactone) diol (PCL, M.W ∼ 2000 g/mol) and biobased macroglycol with aliphatic and aromatic diisocyanates in the presence of various amounts of branch generating unit. FT-IR, 1HNMR, 13CNMR, GPC, and XRD analyses of WBPUs were conducted to study the physicochemical structure, crystallinity, and molecular weight. The WBPUs exhibited high elongation at break (678.9–485.3%), toughn...