Amphiphilic block copolymers containing thermally degradable poly(phthalaldehyde) blocks |
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| Authors: | Stefan Köstler Barbara Zechner Bernd Trathnigg Hubert Fasl Wolfgang Kern Volker Ribitsch |
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| Institution: | 1. Institute of Chemical Process Development and Control, Joanneum Research, Steyrergasse 17, 8010 Graz, Austria;2. Institute of Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria;3. Graz University of Technology, Institute of Chemistry and Technology of Organic Materials, Stremayrgasse 16/I, 8010 Graz, Austria;4. Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria;5. Institute of Chemistry of Polymeric Materials, University of Leoben, Franz‐Josef‐Strasse 18, A‐8700 Leoben, Austria |
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| Abstract: | In this study, the preparation of a new class of amphiphilic block copolymers consisting of a poly(phthalaldehyde) (PPA) block and hydrophilic poly(alkylene oxide) blocks is described. PPA was prepared by ionic cyclopolymerization. A telechelic polymer block was prepared by endcapping of the PPA by a bifunctional reagent carrying isocyanate and isothiocyanate groups. As the second block, monoamino‐terminated poly(alkylene oxide)s (Surfonamines®, also known as Jeffamines®) were chosen. These polymers could be readily coupled to the PPA telechel and gave amphiphlic, mainly ABA‐type block copolymers. The PPA block of these products can be selectively depolymerized at moderate temperature. The block copolymers were characterized by dual‐detection size exclusion chromatography, and the defined and stepwise thermal decomposition of the two different block types were shown by thermogravimetric analysis. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 1499–1509, 2009 |
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| Keywords: | amphiphiles block copolymers ionic polymerization telechelics thermolabile |
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