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Polyurethanes as skin graft candidates.
Date
1989
Author
Kutay, Sezer
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https://hdl.handle.net/11511/8740
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Graduate School of Natural and Applied Sciences, Thesis
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POLYURETHANES AS BIOMEDICAL MATERIALS
KUTAY, S; TINCER, T; Hasırcı, Nesrin (1990-01-01)
Polyurethane films were prepared using diphenylmethanediisocyanate [MDI] or hexamethylenediisocyanate [HDI] and poly(propylene‐ethylene) glycol, in order to test them as biomedical materials specifically for use as skin grafts. Other ingredients such as catalysts, chain extenders, solvents, etc., where not used in order to obtain medical purity. Mechanical properties, oxygen permeation and blood compatibility of these films were examined. Tensile strength, ultimate elongation and elastic modulus values wer...
Polyurethanes in biomedical applications
Burke, A; Hasırcı, Nesrin (2004-01-01)
Polyurethanes are the most commonly used materials in the production of blood contacting devices such as heart valves or artificial veins and arteries. They comprise a large family of materials with the only common characteristic of the presence of urethane linkages along the large molecular chains. In general urethane linkages form by the reaction of isocyanates and alcohols. During the preparation and the curing processes of polyurethanes, besides the formation of urethane linkages, many other reactions t...
Polyurethane based water-dispersed paints
Gafaroğulları, Murat; Gündüz, Güngör; Arca, Emin; Department of Polymer Science and Technology (1997)
POLYURETHANES - EFFECT OF CHEMICAL-COMPOSITION ON MECHANICAL-PROPERTIES AND OXYGEN PERMEABILITY
ULUBAYRAM, K; Hasırcı, Nesrin (1992-01-01)
A series of polyether urethane films with varying hard/soft segment ratio were synthesized using toluene-2,4-diisocyanate (TDI) and polypropylene glycol (PPG) in order to evaluate them as biomaterials. In order to obtain medical purity the polymerization reactions were carried out in bulk without using any other ingredients such as solvent, catalyst, u.v. absorber, etc. The effects of chemical composition and the presence of the chain extender on some properties were examined. For the samples with higher TD...
Polyetheurethane skin substitutes.
Burke, Ayer; Department of Chemistry (1986)
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S. Kutay, “Polyurethanes as skin graft candidates.,” Middle East Technical University, 1989.