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Accession Number:
ADA210446
Title:
Synthesis and Interfacial Properties of New Generation Polyurethane Systems
Descriptive Note:
Final project rept. 1 Jun 1987-31 May 1989
Corporate Author:
WISCONSIN UNIV-MADISON DEPT OF CHEMICAL ENGINEERING
Report Date:
1989-05-30
Pagination or Media Count:
5.0
Abstract:
The thrust of this research has been to synthesize and study the structure-property relationships of several families of modified polyurethanes in three main areas. First, we have attempted to improve the mechanical properties of environmentally stable polyurethanes by inserting polar groups into non-polar soft segments and by using blends of the conventional polar and non-polar soft-segments. Early work examined the effect on segmental compatibility of introducing polar cyanomethylethyl groups into a non-polar siloxane soft segment. Blends of polar polytetramethylene oxide PTMO and non-polar polydimethylsiloxane PDMS were later used in soft segments in an effort to reduce polyurethane moisture sensitivity while retaining good mechanical properties. Second, we have studied the incorporation of novel pendant structures UV-curable groups and ionic groups in segmented polyurethanes, and the material properties of the resulting polymers. A liquid urethane methacrylate prepolymer and various methacrylate monomers were used to form semi-and-full interpenetrating networks IPNs. Third, because molecular characterization is a critical tool in the interpretation of structure-property relationships for these materials, we have investigated the analysis of polyurethane molecular weight distributions and their relationship to synthesis conditions.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
