02712nas a2200265   4500008004100000022001400041245009700055210006900152260009900221300001400320490000700334520176400341653002802105653000902133653001502142653002002157653001402177653001502191653001502206100002102221700002202242700002402264700002802288856013002316       2010                        eng d  a0141-391000aSynthesis and characterization of aromatic polyazomethines bearing pendant pentadecyl chains0 aSynthesis and characterization of aromatic polyazomethines beari  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcSEP  a1727-17350 v953 a<p>Aromatic diamine monomer viz., 4-(4'-aminophenoxy)-2-pentadecylbenzenamine containing pendant pentadecyl chain was synthesized starting from cashew nut shell liquid - a renewable resource material and was characterized by FTIR, (1)H and (13)C NMR spectroscopy. A series of new (co) polyazomethines containing pendant pentadecyl chains and flexibilizing ether linkages was synthesized by polycondensation of 4-(4'-aminophenoxy)-2-pentadecyl benzenamine with commercially available aromatic dialdehydes viz., terephthaldehyde (TPA), isophthaldehyde (IPA) and varying mixture of TPA and IPA. Inherent viscosities and number average molecular weights of (co) polyazomethines were in the range 0.50-0.70 dL/g and 10,490-40-800 (GPC, polystyrene standard), respectively indicating formation of medium to reasonably high molecular weight polymers. (Co) polyazomethines containing pendant pentadecyl chains were found to be soluble in common organic solvents such as chloroform, dichloromethane, tetrahydrofuran, pyridine, m-cresol and could be cast into transparent and stretchable films from their solution in chloroform. (Co) polyazomethines were essentially amorphous in nature and the formation of loosely-developed layered structure was observed arising from the packing of pendant pentadecyl chains. Polyazomethines exhibited glass transition temperatures (T(g)) in the range 21-48 degrees C. The observed depression of glass transition temperature could be ascribed to the ``internal plasticization'' effect of pentadecyl chains. The temperature at 10% wt loss (T(10)), determined from TGA in nitrogen atmosphere of polyazomethines were in the range 434-441 degrees C indicating their good thermal stability. (C) 2010 Elsevier Ltd. All rights reserved.</p>10aCashew nut shell liquid10aCNSL10apentadecyl10apolyazomethines10arenewable10aSide-chain10asolubility1 aMore, Arvind, S.1 aSane, Prakash, S.1 aPatil, Anandrao, S.1 aWadgaonkar, Prakash, P.  uhttp://library.ncl.res.in/content/synthesis-and-characterization-aromatic-polyazomethines-bearing-pendant-pentadecyl-chains-002103nas 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-0