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Fluoro-modified elastomeric polyurethanes: effects of synthesis procedure on properties and morphology

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Abstract

Fluorinated polyurethanes characterized by a segmented structure, containing hard segments based on 4,4′-methylenebis (phenylisocyanate) (MDI), chain-extender 1,4 n-butandiol (BDO), and soft blocks like perfluoropolyether (PFPE), and poly-ε-caprolactone (PCL) were synthesized keeping constant the equivalent ratio among reagents, but varying the experimental conditions. Copolymers show a complex micro- and macrostrucrture with different morphology and calorimetry, similar tensile properties and undistinguishable, but strongly upgraded surface properties. The morphology should be governed by the different fluorine content of the polymeric chains along with the hard segment structure; tensile properties are little influenced by the morphology. All these characteristics are interpreted in terms of polymerization procedure which results to be a key parameter for ruling the composition of the different polymeric chains, due to a very limited mutual solubility of the reagents. Surprisingly, a beneficial effect of the catalyst dibutyltindilaurate for the increase of the reaction kinetics among segregated phases in the reaction mass was observed.

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Authors and Affiliations

  1. Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146, Genoa, Italy

    M. Castellano & A. Turturro

  2. Solvay Specialty Polymers, R&D Center, viale Lombardia 20, Bollate, Milan, Italy

    C. Tonelli & G. Simeone

Authors
  1. M. Castellano
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  2. C. Tonelli
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  3. A. Turturro
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  4. G. Simeone
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Correspondence to M. Castellano.

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Castellano, M., Tonelli, C., Turturro, A. et al. Fluoro-modified elastomeric polyurethanes: effects of synthesis procedure on properties and morphology. J Mater Sci 49, 2519–2533 (2014). https://doi.org/10.1007/s10853-013-7947-8

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  • DOI: https://doi.org/10.1007/s10853-013-7947-8

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