Near-Infrared Spectroscopic Analyses of Poly(ether urethane urea) Block Copolymers. Part I: Bulk Composition

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Abstract:

The ability of near-infrared (NIR) diffuse reflectance spectroscopy to perform rapid bulk composition analyses of poly(ether urethane urea) (PEUU) block copolymers is demonstrated. Six polymer samples with known elemental compositions were used to construct calibration models using the method of classical least-squares (CLS). Results indicate that NIR diffuse reflectance spectroscopy can determine hard-segment and soft-segment contents of the bulk polymers within 2.6% mass over a range of 31% mass. Errors in the calibrations were caused by nonrepresentative NIR sampling of the polymers and by the presence of side products in the polymers. NIR spectra of model hard- and soft-segment materials are used to assign NIR bands to specific functional groups in the polymers.

Keywords: Near-infrared spectroscopy; Polymers

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702904087523

Affiliations: 1: Department of Chemistry, BG-10, University of Washington, Seattle, Washington 98195; present address: Max-Planck-Institut für Polymerforshung, Postfach 3148 D-6500, Mainz, FRG 2: Department of Chemical Engineering and Center for Bioengineering, BF-10, University of Washington, Seattle, Washington 98195; current address: Ciba Corning Diagnostics, 63 North St., Medfield, MA 02052 3: Department of Chemical Engineering and Center for Bioengineering, BF-10, University of Washington, Seattle, Washington 98195

Publication date: May 1, 1990

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