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Sone, Masako
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article
Poly(<i>N</i>‐hydroxyethylacrylamide) Prepared by Atom Transfer Radical Polymerization as a Nonionic, Water‐Soluble, and Hydrolysis‐Resistant Polymer and/or Segment of Block Copolymer with a Well‐Defined Molecular Weight
Abstract
<jats:title>Abstract</jats:title><jats:p><jats:italic>N</jats:italic>‐Hydroxyethylacrylamide (HEAA) was polymerized using the atom transfer radical polymerization (ATRP) with ethyl 2‐chloropropionate (ECP), copper(I) chloride (CuCl), and tris[2‐(dimethylamino)ethyl]amine (Me<jats:sub>6</jats:sub>TREN) in ethanol/water, producing poly(<jats:italic>N</jats:italic>‐hydroxyethylacrylamide) (PHEAA) with well‐defined molecular weights. The thermogravimetric analysis (TGA) indicated that the obtained PHEAA broadly decomposed with a two‐stage weight loss. The first loss was due to the decomposition of the hydroxyethyl groups, which started at temperatures ranging from 249.2 to 277.1 °C. The remaining polyacrylamide backbones started to decompose at temperatures ranging from 352.5 to 383.4 °C. The differential scanning calorimetry (DSC) indicated that PHEAA had a glass transition temperature (<jats:italic>T</jats:italic><jats:sub>g</jats:sub>) ranging from 70.6 to 117.8 °C. The ability of the obtained PHEAA as a prepolymer to initiate other acrylamide derivatives is described. <jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>‐Dimethylacrylamide (DMAA), <jats:italic>N</jats:italic>‐acyloylmorpholine (NAM), and <jats:italic>N</jats:italic>‐[3‐(dimethylamino)propyl]acrylamide (DMAPAA) were subsequently added to the solutions after the polymerization of HEAA with ECP/CuCl/Me<jats:sub>6</jats:sub>TREN, producing the corresponding block copolymers.</jats:p><jats:p><jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/jpeg" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/mgra001.jpg"><jats:alt-text>magnified image</jats:alt-text></jats:graphic></jats:boxed-text> </jats:p>