02103nas a2200229   4500008004100000022001400041245012900055210006900184260010600253300001400359490000700373520114500380653003601525653004801561653001801609653003101627653001601658100002201674700003001696700002801726856011901754       2011                        eng d  a0014-305700aSynthesis of bis-allyloxy functionalized polystyrene and poly (methyl methacrylate) macromonomers using a new ATRP initiator0 aSynthesis of bisallyloxy functionalized polystyrene and poly met  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAUG  a1621-16290 v473 a<p>A new bis-allyloxy functionalized ATRP initiator, viz, 4,4-bis (4-(allyloxy) phenyl) penty1-2-bromo-2-methylpropanoate was synthesized starting from commercially available 4,4-bis (4-hydroxyphenyl) pentanoic acid. Atom transfer radical polymerization of styrene in bulk and that of methyl methacrylate in anisole using CuBr/N,N,N',N',N `'-pentamethyldiethyl-enetriamine system was carried out. The kinetic study of styrene polymerization showed controlled polymerization behavior. Bis-allyloxy functionalized well-defined polystyrene (M(n)(GPC): 13,600-28,250, PDI: 1.07-1.09) and poly (methyl methacrylate) (M(n)(GPC): 10,100-18,450, PDI: 1.23-1.34) macromonomers were obtained. The presence of allyloxy functionality was confirmed by (1)H NMR spectroscopy. The reactivity of allyloxy functionality was demonstrated by carrying out organic reactions such as addition of bromine and hydrosilylation on polystyrene macromonomer. Polystyrene macromonomer with bis-allyloxy functionality was transformed into bis-epoxy functionalized polystyrene macromonomer using 3-chloroperoxybenzoic acid. (C) 2011 Elsevier Ltd. All rights reserved.</p>10aAllyloxy end-functional polymer10aAtom transfer radical polymerization (ATRP)10aMacromonomers10aPoly (methyl methacrylate)10aPolystyrene1 aSane, Prakash, S.1 aPalaskar, Dnyaneshwar, V.1 aWadgaonkar, Prakash, P.  uhttp://library.ncl.res.in/content/synthesis-bis-allyloxy-functionalized-polystyrene-and-poly-methyl-methacrylate-002026nas a2200205   4500008004100000022001400041245011500055210006900170260006700239300001000306490000700316520126400323653001301587653001801600653001301618653001401631653002401645100002901669856012201698       2014                        eng d  a0730-667900aPhotopolymerization kinetics of block polyether based terminal urethane methacrylate with/without cross-linker0 aPhotopolymerization kinetics of block polyether based terminal u  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcFEB  a214180 v333 a<p>The present work deals with the photopolymerization of difunctional macromonomer with a polyether chain and urethane methacrylate terminations. Macromonomeric formulations were prepared by mixing macromonomer with two different concentrations of photoinitiator. Formulations were also prepared by the addition of 10 wt% of soft-segmented difunctional cross-linker to the abovementioned macromonomic formulations. All formulations were then subjected to photopolymerization studies and the effects of light intensity on the photopolymerization kinetics were studied at two different isothermal conditions using photo differential scanning calorimetry (Photo DSC) with polychromatic radiation. The isothermal heat flow against time was recorded for all formulations and the kinetic parameters were noted. It was observed that the rate of maximum polymerization as well as peak maximum time showed a general trend. However, the ultimate conversion as well as the conversion at maximum rate did not show any trend due to diffusional restrictions imparted by the increase in viscosity with conversion. The photopolymerization of the formulations and curing kinetics including evaluation of autocatalytic model are discussed. (C) 2014 Wiley Periodicals, Inc.</p>10akinetics10aMacromonomers10aModeling10aPhoto DSC10aPhotopolymerization1 aReghunathan, Harikrishna  uhttp://library.ncl.res.in/content/photopolymerization-kinetics-block-polyether-based-terminal-urethane-methacrylate-0