Authors: Simonovsky, Felix I.; Wu, Yuguang; Golledge, Stephen L.; Ratner, Buddy D.; Horbett, Thomas A.

Source: Journal of Biomaterials Science, Polymer Edition, Volume 16, Number 12, 2005 , pp. 1463-1483(21)

Publisher: VSP, an imprint of Brill

Abstract:

The object of this work was to produce polyurethanes with greater affinity for albumin (Alb) and improved hemocompatibility by introduction of carboxyl-terminated alkyl side-chains that better mimic fatty acids, in contrast to methyl terminated alkyl side-chains used previously. Synthesis of poly(ether urethane)s (PEUs) with long alkyl side-chains via a multi-step solution addition polymerization is described. The synthesis is based upon the polymerization of a diisocyanate pre-polymer with various chain extenders and reaction with Br-terminated compound in the final stage. The side-chains had terminal methyl or carboxylic groups, and were attached either directly to the polymer backbone or to an oligo(ethylene glycol) spacer. The bulk structure of the PEUs was confirmed by ¹H-NMR and the surface polymer structure was characterized by ToF-SIMS. The influence of the incorporated C₁₆-alkyl, C₁₆-carboxyalkyl and oxyethylene-C₁₆-carboxyalkyl side-chains attached to the polymer backbone on fibrinogen (Fg) and Alb adsorption from blood plasma, and Fg adsorption from buffer solutions and binary mixtures with Alb was measured. Incorporation of C₁₆-alkyl or C₁₆-carboxyalkyl side-chains into PEUs caused relatively small changes in Fg and Alb adsorption. PEUs with oxyethylene-C₁₆-carboxyalkyl side-chains exhibited the lowest Fg adsorption and the highest Alb adsorption among all the tested polymers.

Keywords: POLY(ETHER URETHANE); POLYMERIZATION; FIBRINOGEN; SIDE-CHAIN; 1H-NMR; TOF-SIMS

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156856205774576691

Publication date: 2005-12-01

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• In this Subject: Chemistry (General) ,  Engineering/Technology ,  Materials & Manufacturing
• By this author: Simonovsky, Felix I. ;  Wu, Yuguang ;  Golledge, Stephen L. ;  Ratner, Buddy D. ;  Horbett, Thomas A.

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