Abstract
An alternating fluorinated copolymer based on chlorotrifluoroethylene (CTFE) and butyl vinyl ether (BVE) was synthesized by RAFT/MADIX living/controlled polymerization in the presence of S-benzyl O-ethyl dithiocarbonate (BEDTC). Then, using the obtained poly(CTFE-alt-BVE) as a macro chain transfer agent (macro-CTA), a block copolymer was prepared by chain extension polymerization of vinyl acetate (VAc). After a basic methanolysis process, the poly(vinyl acetate) (PVAc) block was transferred into poly(vinyl alcohol) (PVA). Finally, a novel fluorinated polyurethane with good surface properties due to the mobility of the flexible fluorinated polymer chains linked to the network was obtained via reaction of the copolymer bearing the blocks of PVA with isophorone diisocyanate (IPDI) as a cross-linking agent.
Highlights
A New Strategy for the Synthesis of Fluorinated PolyurethaneCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Fluorinated polyurethanes, a new class of functional materials, combine some virtues of fluorinated polymer and polyurethane, such as high thermal stability, good mechanical properties, excellent chemical resistance, and attractive surface properties. [1–16] As a result, they have attracted considerable interest in recent years.Fluorocarbon chains or groups have been incorporated into polyurethanes by fluorinated chain extenders, [17–21] diisocyanates, [22] glycols, [23–41] side groups/chains [42–58], and end-cappers [59–66].In 2005, for the first time, a novel fluorinated polyurethane based on polyurethane macromonomers partly acrylate-endcapped with hexafluorobutyl acrylate was synthesized through macromonomer radical copolymerization [17]
We successfully prepared a novel crosslinked fluorinated polyurethane with flexible fluorinated polymer chains linked to the network
Summary
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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