Authors Pitto, V. ; Voit, B. ; Loontjens, T.J.A ; van Benthem, R.A.T.M.
Title New Star-Branched Poly(acrylonitrile) Architectures: ATRP Synthesis and Solution Properties
Date 18.11.2004
Number 12746
Abstract <B>Summary:</B> Atom transfer radical polymerization (ATRP) has been chosen as <IMGSRC="/giflibrary/12/ldquo.gif"BORDER="0">living<IMGSRC="/giflibrary/12/rdquo.gif"BORDER="0">/controlled free radical polymerization system to synthesize a number of novel poly(acrylonitrile) (PAN) architectures. The reaction conditions for the synthesis of linear samples with control over molar mass and molar mass distribution have been investigated together with the possibility of obtaining copolymers of acrylonitrile with small quantities of methyl acrylate (max. 5 mol-%). Well-defined star polymers with 3, 4 and 6 arms have been successfully synthesized together with linear chains initiated by a bifunctional initiator and star-branched polymers with a hyperbranched poly(ester amide) as core. Molar masses were determined by NMR and GPC with the latter leading to a significant over estimation. Solution viscosity studies indicated that the stiff structure of the PAN chains is still maintained in the homopolymer star architectures and that the incorporation of small quantities of methyl acrylate as comonomer has a stronger effect on chain flexibility than the incorporation of star-branch points.
Publisher Macromolecular Chemistry and Physics
Wikidata Q57351772
Citation Macromolecular Chemistry and Physics 205 (2004) 2346-2355
Tags atom transfer radical polymerization (atrp) branched polymers poly(acrylonitrile) solution properties star polymers transfer radical polymerization polymers polyacrylonitrile acrylonitrile copolymers

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