Polycarbonate urethane

Hydrolysis studies compared a polycarbonate urethane with a poly(tetramethyl-ene adipate) urethane and a polyether urethane based on PTMEG. After 2 weeks in 80°C water, the polycarbonate urethane had the best retention of tensile properties [92], Polycarbonates can hydrolyze, although the mechanism of hydrolysis is not acid-catalyzed, as in the case of the polyesters. Polycarbonate polyurethanes have better hydrolysis resistance than do standard adipate polyurethanes, by virtue of the highest retention of tensile properties. It is interesting to note in the study that the PTMEG-based urethanes, renowned for excellent hydrolysis resistance, had lower retention of physical properties than did the polycarbonate urethanes. 

Emsting MJ, Labow RS, and Santerre JP. Surface modihcation of a polycarbonate-urethane using a vitamin-E derivatized fluoroalkyl surface modifier. J Biomater Sci Polym Ed, 2003, 14, 1411-1426. 

A new material with good antithrombogenic properties, suitable as biomedical material which assures the endothelialization of the inner surface of a polyurethane tube to imitate the inner wall of a natural blood vessel has been synthesized by blending PVA with polycarbonate urethane)(PCU) [229],... 

Christenson EM, Anderson JM, Hiltner A. Antioxidant inhibition of polycarbonate urethane) in vivo biodegradation. Journal of Biomedical Materials Research A 2006, 76, 480-490. 

Christenson, E.M., Patel, S., Anderson, J.M., and Hiltner, A. (2006) Enzymatic degradation of poly(ether urethane) and polycarbonate urethane) by cholesterol esterase. Biomaterials, 111 (21), 3920-3926. 

M. Tanzi, S. Fare, R Petrini, In vitro stability of polyether and polycarbonate urethanes, J. Biomater. Appl. 14 (4) (2000) 325-348. 

I. Khan, N. Smith, E. Jones, D. Finch, R. Cameron, Analysis and evaluation of a biomedical polycarbonate urethane tested in an in vitro study and an ovine arthroplasty model. Part I materials selection and evaluation, Biomaterials 26 (6) (2005) 621-631. 

POSS, polyhedral oligomeric silsesquioxane PCU, polycarbonate urethane PU, polyurethane PEU, poly(aher urethanes) PTFE, polytetrafluoroethylene PVA, polyvinyl ... 

Direct reaction of castor oil with 4,4 -methylenebisphenyl diisocyanate gave standard polyurethane material [52]. In efforts to modify the physical properties of the polymer, castor oil was mixed with trimethylol propane (a common industrial building block) and the stoichiometric ratios of the diisocyanates involved were varied [53], The reaction in this instance displayed second order kinetics. Polycarbonate-urethanes were also produced from... 

Szelest-Lewandowska, A., Masiulanis, B., Szymonowicz, M. et al. (2007) Modified polycarbonate urethane synthesis, properties and biological investigation in vitro. Journal ofBiomedical Materials Research, Part A, 82A(2), 509-520. 

CNF/polycarbonate urethane (PCU) Promoting selective adhesion and alignment... 

Kim JY, Khang D, Lee JE. Decreased macrophage density on carbon nanotube patterns on polycarbonate urethane. J Biomed Mater Res A 2009 88A 419-26. 

Polyurethanes are sensitive to strong acids, strong alkalis, aromatics, alcohols, hot water, hot moist air and saturated steam. The hydrolytic stability of polyurethanes in applications must be considered carefully. However, polyurethanes are resistant to weak acids, weak alkalis, ozone, oxygen, mineral grease, oils and petroleum. There are doubts for the oxidation stability of polytetramethylene ether glycol based polyurethanes. Polycarbonate urethane is a promising substitute with good oxidation stability. 

Polycarbonate urethane, epoxy, rubber-based adhesives. 

SMPU containing polycarbonate segments were synthesized by the prepolymer method of an aliphatic polycarbonate diol. The macrodiol was synthesized by copolymerization of ethylene oxide in the presence of CO2 catalyzed by a polymer supported bimetallic catalyst [60]. In these polycarbonate urethanes Ttrans = 7g and was around 5 C. Another example with higher Ttrans are segmented polyesterurethanes based on a copolymer of L-lactide and e-caprolactone, providing the switching domains as well as the polyurethane from butanediol and 2,4-toluene diisocyanate [52]. Tsw could be adjusted between 28 and 53 °C. Rr was determined between 93 and 100%. 

Chandy, T., Van Hee, J., Nettekoven, W. Johnson, J. (2009) Long-term in vitro stability assessment of polycarbonate urethane micro catheters Resistance to oxidation and stress cracking. Journal of Biomedical Materials Research Part B—Applied Biorruiterials, 89B, 314-324. 

Tanzi, M. C., Mantovani, D., Petrini, R, Guidoin, R. Laroche, G. (1997) Chemical stability of polyether urethanes versus polycarbonate urethanes. Journal of Biomedical Materials Research, 36, 550-559. 

Polycarbonate urethane having poly(acrylic acid) functional groups Highly porous scaffold fabricated by pressure differential solvent casting — particulate leaching Dubey et al. (2011)... 

Tang Y, et al. Influence of surface morphology and chemistry on the enzyme catalyzed biodegradation of polycarbonate-urethanes. J Biomater Sci Polym Ed 2002 13(4) 463-83. 

Yang M, Zang Z, Hahn C, Laroche G, King MW, Guidoin R. Totally implantable artificial hearts and left ventricular assist devices selected impermeable polycarbonate urethane to manufacture ventricles. J Biomed Mater Res 1999 48(1) 13-23. 

Clauser J, Gester K, Roggenkamp J, Mager 1, Maas J, Jansen SV, et al. Micro-shuctuiing of polycarbonate-urethane surfaces in order to reduce platelet activation and adhesion. J Biomater Sci Polym Ed 2014 25 504-18. http //dx.doi.org/10.1080/09205063.2013.879561. 

Gao B, Feng Y, Lu J, Zhang L, Zhao M, Shi C, et al. Grafting of phosphorylchohne functional groups on polycarbonate urethane surface for resisting platelet adhesion. Mater Sci Eng C Mater Biol Appl 2013 33(5) 2871-8. 

CarboSil TSPCU DSM Corporate S ilicone-polycarbonate—urethane copolymer... 

Different types of biostable PURs have been used in heart valve components, including polyether urethanes (PEUs), polyether urethane ureas (PEUUs), polycarbonate urethane (PCUs), polycarbonate urethane ureas (PCUUs), polycarbonate-based materials that contain polyhedral oligomeric silsequioxane nanoparticles (POSS) (Ghanbari et al., 2010 Kidane et al 2009b), and those that contain polysiloxane soft segments (Bezuidenhout et al 2015). 

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