polyurethanes (purs) are polymers that can be generated by a step-growth polyadditionreaction of diisocyanates with polyols. the number of well-developed chemical procedures applicable to theirmanufacture, and the diversity of chemical structures in which polyurethanes can be built, account for thewidespread use of these materials in the last few decades for both domestic and technical applicat...

OBJECTIVE To evaluate the safety and tolerability of a novel, fully synthetic, poly-urethane middle meatal dressing after endoscopic sinus surgery (ESS). STUDY DESIGN Case series with planned data collection. SETTING Tertiary care medical facility. SUBJECTS AND METHODS In total, 104 patients with medically refractory chronic rhinosinusitis were treated with patient-appropriate ESS and a p...

Random copolymers of epsilon-caprolactone and 2-oxo-12-crown-4 ether, poly(CL-co-OC), were used as soft segments in the synthesis of a set of poly(urethane)urea thermoplastic elastomers. With increasing OC content, the soft segment crystallinity decreased, which influenced the mechanical properties: strain induced crystallization disappeared upon the introduction of OC into poly(CL). The materi...