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Biomedical polyurethanes

Martin DJ, Warren LAP, Gunatillake PA, McCarthy SJ, Meijs GF, Schindhelm K (2001) New methods for the assessment of in vitro and in vivo stress cracking in biomedical polyurethanes. Biomaterials 22(9) 973-978... [Pg.150]

Sreenivasan, K. A combined chromatographic and IR spectroscopic method to identify antioxidant in biomedical polyurethane. Chromatographia 1991, 32, 285-286. [Pg.397]

No. 12, June 1997, p.839-44 CONTROLLED RELEASE OF ANTIBIOTICS FROM BIOMEDICAL POLYURETHANES MORPHOLOGICAL AND STRUCTURAL FEATURES... [Pg.90]

Polyurethanes were first suggested for use as biomaterials in 1967 [36]. Polyurethane materials have excellent mechanical properties, making them suitable for many different biomedical applications. Currently, a variety of polyurethanes are used in biomedical devices like coatings for catheters and pacemaker leads (Table A.2). The biocompatibility of biomedical polyurethanes appears to be determined by their purity i.e., the effectiveness of the removal from the polymer of catalyst residues and low molecular weight oligomers [37]. The surface properties of commercially available polyurethanes, which are critically important in determining biocompatibility, can vary considerably, even among lots of the same commercially available preparation [38]. [Pg.325]

Gogolewski, S., Selected topics in biomedical polyurethanes a review. Colloid Polymer Science, 1989, 267, 757-785. [Pg.332]

TABLE 7.1 List of Published Patents for Drug Delivery, Tissue Engineering, and Medical Devices Using Biomedical Polyurethanes ... [Pg.125]

R. Hernandez, J. Weksler, A. Padsalgikar, J. Runt, In vitro oxidation of high polydimethylsiloxane content biomedical polyurethanes correlation with the microstructure, J. Biomed. Mater. Res. A 87 (2) (2008) 546-556. [Pg.143]

D.G. Duguay, R.S. Labow, J.P. Santerre, D.D. McLean, Development of a mathematical model describing the enzymatic degradation of biomedical polyurethanes. 1. Background, rationale and model formulation. Polym. Degrad. Stab. 47, 229-249 (1995)... [Pg.262]

Gabriel, L.P., et al. 2014. Isocyanates as precursors to biomedical polyurethanes. Chemical Engineering Transactions 38 253-258. [Pg.49]

Anderson J, et al. Recent advances in biomedical polyurethane biostaility and biodegradation. Polym Int 1998 46(3) 163-71. [Pg.17]

De Groot J, et al. New biomedical polyurethane ureas with high tear strengths. Polym Bull 1997 38(2) 211-8. [Pg.21]

P. Alves, P. Ferreira, M.H. Gil, Biomedical Polyurethane-Based Materials, in Polyurethane Properties, Structure and Applications, Nova Publishers, New York, 2012. ISBN ... [Pg.142]

Schierholz JM, Steinhauser H, Rump AFE, Berkels R, Pulverer G. Controlled release of antibiotics from biomedical polyurethanes morphological and structural features. Biomaterials 1997 18 839. http //dx.doi.org/10.1016/S0142-9612(96)00199-8. [Pg.281]

Biomedical polyurethanes have also been modified with organically modified layered silicates (OLS) to improve mechanical properties and reduce gas permeability. Xu et al. [26] demonstrated an increase in tensile modulus with increased OLS concentration without the loss of strength and ductihty that is typical for filler systems. Additionally, they observed a fivefold decrease in water vapor permeability, which is a major advantage for blood-contacting biomedical devices. [Pg.633]

A novel type of asymmetric blend membrane using a superfine chitosan powder (SCP) and biomedical polyurethane (PU) was prepared, and the variation of water absorption of different SCP/PU membranes investigated [llj. Chitosan chains contain abundant hydrophilic —OH and —NH2 groups which easily absorb water molecules hence, as the SCP ratio was increased the membranes were able to absorb more water and reach a higher equilibrium water absorption percentage. The other factor that affects water absorption is membrane structure. In this case. [Pg.419]


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