02108nas a2200253   4500008004100000022001400041245015000055210006900205260007300274300001200347490000700359520113700366653003801503653000901541653002101550653001601571653000801587100002201595700002601617700003001643700002201673700002801695856013101723       2012                        eng d  a1381-514800aAromatic aldehyde functionalized polycaprolactone and polystyrene macromonomers: synthesis, characterization and aldehyde-aminooxy click reaction0 aAromatic aldehyde functionalized polycaprolactone and polystyren  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a713-7210 v723 a<p>New bis-aldehyde functionalized initiators, viz, 4,4'-(4,4'-(5-hydroxypentane-2,2-diyl)bis(4,1-phenylene))bis(oxy)dibenza ldehyde (1) and 4,4'-bis(4-(4-(formylphenoxy) phenyl) pentyl 2-bromopropanoate (2) were synthesized starting from commercially available 4,4'-bis(4-hydroxyphenyl) pentanoic acid. These initiators were utilized, respectively, for ring opening polymerization of E-caprolactone and atom transfer radical polymerization of styrene. Well-defined polycaprolactone macromonomers (M-n(GPC): 2600-19400, PDI: 1.37-1.47) and polystyrene macromonomers (M-n(GPC): 2800-28200, PDI: 1.11-1.16) with bis-aldehyde functionality were synthesized. The kinetic study of styrene polymerization showed controlled polymerization behaviour. The presence of aldehyde functionality in macromonomers was confirmed by H-1 NMR spectroscopy. The reactivity of aldehyde functionality was demonstrated by carrying out aldehyde-aminooxy click reaction of polycaprolactone macromonomer with O-(2-azidoethyl) hydroxylamine which proceeded in a quantitative manner without backbone degradation. (C) 2012 Elsevier Ltd. All rights reserved.</p>10aAldehyde-terminated macromonomers10aATRP10aPolycaprolactone10aPolystyrene10aROP1 aSane, Prakash, S.1 aTawade, Bhausaheb, V.1 aPalaskar, Dnyaneshwar, V.1 aMenon, Shamal, K.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/aromatic-aldehyde-functionalized-polycaprolactone-and-polystyrene-macromonomers-synthesis-002210nas a2200265   4500008004100000022001400041245010700055210006900162260000900231300000700240490000700247520130000254653002401554653002401578653001501602653002201617100002501639700002801664700002401692700002601716700002901742700002301771700002801794856012201822       2017                        eng d  a1022-976000aAromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups: synthesis and characterization0 aAromatic polyesters containing pendent 4phenylsulfonylphenyl gro  cMAR   a570 v243 a<p>A new bisphenol, 1,1-bis-[(4-hydroxyphenyl)-1-(4-phenylsulfonyl) phenyl)] ethane (DPSBP) was synthesized starting from diphenylsulfide and was characterized by spectroscopic methods. DPSBP was polycondensed with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of IPC and TPC (50: 50 mol%) by phase-transfer catalysed interfacial polymerization method to obtain aromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups. A series of copolyesters was also obtained by polycondensation of varying molar proportions of DPSBP and bisphenol-A (BPA) with TPC. (Co) polyesters exhibited inherent viscosities in the range 0.56-1.57 dLg(-1) and number average molecular weights (Mn) were in the range 28,650-80,230 g/mol. Polyesters dissolved readily in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran and aprotic polar solvents such as N-methylpyrrolidone, and N, N-dimethylacetamide. Tough, transparent and flexible films of polyesters could be cast from their chloroform solutions. X-Ray diffraction studies indicated amorphous nature of aromatic polyesters. Polyesters showed T-g values in the range 223-257 degrees C while T-10 values were in the range of 469-484 degrees C indicating their excellent thermal stability.</p>10aAromatic polyesters10aBulky pendent group10asolubility10athermal stability1 aBapat, Snehalata, P.1 aJadhav, Sushilkumar, A.1 aValsange, Nitin, G.1 aTawade, Bhausaheb, V.1 aHonkhambe, Pandurang, N.1 aChavan, Nayaku, N.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/aromatic-polyesters-containing-pendent-4-phenylsulfonylphenyl-groups-synthesis-and