Synthesis and characterization of biocompatible composites based on polyurethane–sodium alginate

Polyurethanes (PUs) are interesting polymers with broad applications which are synthesized from polyaddition reactions of Isocyanate and hydroxyl groups [1]. Water-basedpolyurethanes are proper substitutes for traditional solventbased PUs, because applications of later polymers encounterwith some restrictions due to environmental regulations [2]. On the other hand alginates are important biological polymers that have been attracted intensely during last two decades [3].The aim of this research is preparation of waterborne polyurethane–sodium alginate (WBPU/SA) compositions and study of thermal and hydrophilic properties of these blends