Preparation and Characterization of Glucose and Sulfamate Double‐Modified Biodegradable Waterborne Polyurethane

Abstract

AbstractA kind of glucose and sulfamate double‐modified waterborne polyurethane (WPU) was synthesized by using glucose (GLC) and N‐[(2‐amionoethyl)‐amino] ethane sulphonated sodium (AAS) as internal crosslinking agent, polycaprolactone glycol (PCL) as soft segment, 2,2‐bis(hydroxymethyl) propionic acid (DMPA) and N‐[(2‐amionoethyl)‐amino] ethane sulphonated sodium (AAS) as hydrophilic monomers. The influences of AAS and GLC content on the WPU structure and properties were analyzed and characterized by high speed of centrifugation, particle size examination, ATR‐FTIR, TEM, DMA, TGA, SEM, tensile tests, contact angle, water uptake and degradation measurements. The test results indicated that the modified biodegradable WPU had great comprehensive properties. Compared with the unmodified polyurethane, the prepared cross‐linked WPU had a good stability (over 6 months), outstanding mechanical strength (51.55 MPa for WPU4 films) and biodegradability (the weight loss in soil and PBS/lipase reached 25.2 % and 11.8 % for 6 weeks), which made them appropriate supplements for the traditional waterborne polyurethanes in the future.