Authors
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Tunca, U. ; Ozyurek, Z. ; Erdogan, T. ; Hizal, G.
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Title
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Novel Miktofunctional Initiator for the Preparation of an ABC-Type Miktoarm Star Polymer via a Combination of Controlled Polymerization Techniques
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Date
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01.09.2004
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Number
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12539
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Abstract
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An ABC-type miktoarm star polymer was prepared with a core-out method via a combination of ring-opening polymerization (ROP), stable free-radical polymerization (SFRP), and atom transfer radical polymerization (ATRP). First, ROP of <IMGSRC="/giflibrary/12/epsi.gif"BORDER="0">-caprolactone was carried out with a miktofunctional initiator, 2-(2-bromo-2-methyl-propionyloxymethyl)-3-hydroxy-2-methyl-propionic acid 2-phenyl-2-(2,2,6,6-tetramethyl-piperidin-1-yl oxy)-ethyl ester, at 110 °C. Second, previously obtained poly(<IMGSRC="/giflibrary/12/epsi.gif"BORDER="0">-caprolactone) (PCL) was used as a macroinitiator for SFRP of styrene at 125 °C. As a third step, this PCL-polystyrene (PSt) precursor with a bromine functionality in the core was used as a macroinitiator for ATRP of <I>tert</I>-butyl acrylate in the presence of Cu(I)Br and pentamethyldiethylenetriamine at 100 °C. This produced an ABC-type miktoarm star polymer [PCL-PSt-poly(<I>tert</I>-butyl acrylate)] with a controlled molecular weight and a moderate polydispersity (weight-average molecular weight/number-average molecular weight < 1.37). The obtained polymers were characterized with gel permeation chromatography and <SUP>1</SUP>H NMR. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 4228-4236, 2004
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Publisher
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Journal of Polymer Science: Part A: Polymer Chemistry
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Wikidata
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Citation
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Journal of Polymer Science: Part A: Polymer Chemistry 42 (2004) 4228-4236
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DOI
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https://doi.org/10.1002/pola.20284
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Tags
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