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N‐Oligo(3‐hydroxybutyrate)‐functionalized polypyrroles: towards bio‐erodible conducting copolymers
Authors:Anna Domagala  Wojciech Domagala  Przemyslaw Ledwon  Marta Musiol  Henryk Janeczek  Agnieszka Stolarczyk  Piotr Kurcok  Grazyna Adamus  Mieczyslaw Lapkowski
Affiliation:1. Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland;2. Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, Gliwice, Poland
Abstract:New copolymer materials have been prepared by chemical grafting of oligomeric 3‐hydroxybutyric acid (OHB) onto polypyrrole (PPy) derivatives. The influence of grafting density and molecular weight of OHB brushes on the physicochemical properties of prepared copolymers was investigated. PPy substrates were prepared by FeCl3‐driven oxidative homopolymerization of N‐(2‐carboxyethyl)pyrrole or its copolymerization with pyrrole. The grafting method employed involved controlled anionic polymerization of β‐butyrolactone on pyrrole‐tethered potassium carboxylate active sites. Obtained PPy‐g‐OHB copolymers of varying grafting density and pendant polyester chain length were characterized and the observed structure–property relationships discussed. The impact of real time exposure to phosphate‐buffered saline environment was investigated and the residue products were characterized. Cross‐correlation of spectroscopic, thermal, electrical and elemental analysis data afforded comprehensive evaluation of the structure of prepared materials and their behaviour in hydrolytic medium. Erosion and degradation pathways have been identified, indicating ways to consciously tailor the physicochemical properties of these new biomimetic materials. © 2016 Society of Chemical Industry
Keywords:conducting polymers  polypyrrole  3‐hydroxybutyrate  copolymerization  grafting  erosion
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