A synthetic route for the preparation of a novel solution terpolymer derived from styrene, methyl styrene, and polyaniline (PANI) and its organoclay nanocomposite with conductive and mechanical properties is demonstrated. Soluble PANI was synthesized by the incorporation of brominated poly(styrene-co-methyl styrene) onto the emeraldine form of PANI. Styrene-co-methyl styrene copolymer was synthesized via nitroxide-mediated living radical polymerization by 2,2,6,6-tetramethylpiperidinyloxy iniferter and then was brominated with N-bromosuccinimide. The solution terpolymer derived from styrene, methyl styrene, and PANI was synthesized through the N-grafting reaction of deprotonated PANI and brominated terpolymer. Nanocomposites of the terpolymer with modified montmo-rillonite were prepared with a solution intercalation method. The conductivity of the terpolymer was measured by the four-point probe method. The structures of the intermediate, terpolymer, and nanocomposite were investigated by Fourier transform infrared spectroscopy, 1 H-NMR, and Xray diffraction techniques. The molecular weight of the terpolymer was determined by gel permeation chromatography. Their thermal behavior was examined by differential scanning calorimetry and thermogravimetric analyses. V C 2011Wiley Periodicals, Inc. J Appl Polym Sci 125: E131-E140, 2012

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Isotactic polypropylene-based polymer hybrids linking poly(methyl methacrylate) (PMMA) was successfully synthesized by a graft copolymerization from maleic anhydride-modified polypropylene (PP; PP-MAH). PP-MAH reacted with ethanolamine to produce a hydroxyl group containing PP (PP-OH), and thus, the obtained PP-OH was treated with a-phenyl chloroacetyl chloride and converted to a chloroacetyl group containing PP. The metal-catalyzed radical polymerization of methyl methacrylate with PP-Cl was performed using a copper catalyst system in o-xylene solution at 100 C to give the PP-based polymer hybrids linking PMMA segments (PP-PMMA hybrids). Thus, obtained PP-PMMA hybrids demonstrated higher melting temperature than PP-Cl and microphaseseparation morphology at the nanometer level owing to the chemical linkage between both the segments. The prepared graft copolymer was characterized by Fourier transform infrared and 1 H nuclear magnetic resonance techniques. Glass transition temperature of grafted copolymer was investigated using thermogravimetric analysis and differential scanning calorimetric techniques.

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Amphiphilic block copolymers are used in a variety of applications, for example, as stabilizers for emulsions and dispersions or as compatibilizers in polymer blends. Amphiphilic diblock copolymer composed of methoxypoly(ethylene glycol) and polystyrene (MPEG-b-PS) was synthesized using atom transfer radical polymerization (ATRP) and nitroxide-mediated radical polymerization (NMRP). In order to synthesize MPEG-b-PS diblock copolymer using ATRP, monofunctional MPEG macroinitiator (chloroacetylated MPEG [MPEG-Cl]) was prepared from monohydroxyfunctional poly(ethylene glycol) and initiated end group on the basis of chloroacetyl chloride. ATRP was carried out in bulk using MPEG-Cl as the macroinitiator, copper chloride (CuCl)/2,2 0 -bipyridine (bipy) as the catalyst ([MPEG-Cl]/[CuCl]/[bipy] ¼ 1:1:3), and styrene as the monomer. For preparation of MPEG-b-PS by means of NMRP, firstly, 1-hydroxy-2,2,6,6-tetramethylpiperidine (TEMPO-OH) was obtained by reduction of 2,2,6,6-tetramethyl-piperidinyl-1oxy (TEMPO) with sodium ascorbat. Then, TEMPO-OH was coupled with chloroacetylated MPEG (MPEG-Cl) to yield the macroinitiator MPEG terminated with a TEMPO unit