Polyurethanes (PUR)
“A polyurethane (IUPAC abbreviation PUR, but commonly abbreviated PU) is any polymer consisting of a chain of organic units joined by urethane (carbamate) links. Polyurethane polymers are formed through step-growth polymerization by reacting a monomer containing at least two isocyanate functional groups with another monomer containing at least two hydroxyl (alcohol) groups in the presence of a catalyst.”
(Wikipedia, Polyurethanes, 12/10/2010)
Polymers /Resins
Polyurethane Drug Delivery
Polyurethane Scaffolds
Polyurethane Shape Memory Materials
Polyurethanes in Golf Balls
Recent Journal Articles
Dielectric properties of castor oil cross-linked polyurethane
(49-58) High Performance Polymers 23 #1 (2011)
Abstract
Oprea, Potolinca and Oprea of the Petru Poni' Institute of Macromolecular Chemistry and the University of Medicine and Pharmacy,, Romania synthesized a series of polyurethanes cross-linked with castor oil. It was found that the formation of hydrogen bonds between urethane groups of physical networks may control the molecular mobility, but the chemical nature and content of the cross-links of the hard segments strongly influences the molecular relaxation. (RDC 4/8/2011)
Review Articles
Progress in Study of Non-Isocyanate Polyurethane
(6517–6527) Industrial & Engineering Chemistry Research 50 #11 (2011)
Guan et al, China, reviewed non-isocyanate polyurethanes (NIPU) prepared by reaction of cyclo-carbonates and amines without use of toxic isocyanates. NIPU has attracted increasing attention because of its improvements in porosity, water absorption, and thermal and chemical resistance over conventional polyurethanes. Their potential technological applications include chemical-resistant coating, sealants, foam, etc. (RDC 6/14/2011)