Derivatization of a new poly(ether urethane amide) containing chemically active sites.
A novel poly(ether urethane amide) was synthesized by chain-extending the prepolymer with fumaric acid, resulting in a polymer exhibiting superior mechanical properties and containing chemically active derivatization sites, stemming from the fumaramide double bond. The derivatization of the active sites was performed via a Michael-like addition of amine-terminated poly(ethylene oxide) chains, which when performed in bulk, greatly affected the mechanical properties of the polymer, except in the case in which a relatively high molecular weight was grafted. Surface grafting of the polymer led to a significantly lower effect on its mechanical properties, which was minimal when a high molecular weight molecule was used.
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Casali Institute of Applied Chemistry, School of Applied Science and Technology, Hebrew University of Jerusalem, Israel.
Penhasi
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Cohn
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D000042:Absorption; D000577:Amides / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry; D005650:Fumarates / Q000737:chemistry*; D008970:Molecular Weight; D011092:Polyethylene Glycols / Q000737:chemistry; D011140:Polyurethanes / Q000138:chemical synthesis* / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013817:Thermography
D000577:Amides; D003432:Cross-Linking Reagents; D005650:Fumarates; D011140:Polyurethanes; C115016:polyetherurethane; D011092:Polyethylene Glycols; C032239:fumaramide; C032005:fumaric acid