Fluorine containing poly(amide-imide)s: synthesis and formation of Langmuir-Blodgett monolayers |
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Authors: | E.J Onah,L Hä uß ler,D Voigt,C Froeck,H Komber,B.I Voit,K Lunkwitz |
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Affiliation: | Institute of Polymer Research, Dresden, Hohe Strasse 6, 01069 Dresden, Germany |
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Abstract: | Soluble fluorine containing poly(amide-imide)s, PAI(1-4), were synthesized from diimide-dicarboxylic acid, 2,2-bis[N-(4-carboxyphenyl)-phthalimide-1,4-yl]hexafluoropropane with various diamines by direct polycondensation in N-methyl-2-pyrrolidone (NMP) containing CaCl2 and using triphenyl phosphite and pyridine as condensing agents. The polymers were readily soluble in aprotic polar solvents such as NMP, N,N-dimethylacetamide, dimethyl sulfoxide and tetrahydrofuran. Their Langmuir monolayers were studied at the air/water interface. The monolayers were generally stable at the water surface and could be reproducibly transferred onto solid substrates to build up Langmuir-Blodgett (LB) multilayers. The LB mono- and multilayers were characterized by ultra-violet/visible spectroscopy (UV-Vis), surface plasmon resonance, atomic force microscopy. |
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Keywords: | Polycondensation Fluoropolymers Poly(amide-imide)s Langmuir-Blodgett technique Monolayer Multilayers |
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