02713nas a2200265 4500008004100000022001400041245009700055210006900152260009900221300001400320490000700334520176400341653002802105653000902133653001502142653002002157653001402177653001502191653001502206100002102221700002202242700002402264700002802288856013102316 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

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.

10aCashew nut shell liquid10aCNSL10apentadecyl10apolyazomethines10arenewable10aSide-chain10asolubility1 aMore, Arvind, S.1 aSane, Prakash, S.1 aPatil, Anandrao, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-aromatic-polyazomethines-bearing-pendant-pentadecyl-chains-002173nas a2200253 4500008004100000022001400041245004500055210004500100260007400145300001200219490000700231520139000238653001501628653001601643653001501659653002301674653000801697100002501705700002501730700002601755700002801781700002801809856008201837 2011 eng d a1022-976000aPolyamides containing quinoxaline moiety0 aPolyamides containing quinoxaline moiety aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJUL a549-5570 v183 a

A new quinoxaline moiety containing aromatic diamine; 2,3-bis[4-(4-aminophenoxy)phenyl]quinoxaline (APQ) was synthesized starting from 4-methoxybenzaldehyde and was characterized by IR, (1)H, (13)C NMR and Mass spectrometry. Five new polyamides were synthesized by polycondensation of various aliphatic diacid / aromatic diacids namely, azelaic acid, bis(4-carboxyphenyl)dimethylsilane, 4,4'-oxybis(benzoicacid), isophthalic acid and terephthalic acid with APQ by Yamazaki's phosphorylation method using triphenyl phosphite as condensing agent. The polyamides were characterized by IR spectroscopy, solubility tests, inherent viscosity, X-ray diffraction technique, differential scanning colorimetry and thermogravimetric analysis. The polyamides had inherent viscosities in the range 0.39-0.45 dL/g in N, N-dimethylacetamide at 30 +/- 0.1 A degrees C. The polyamides were soluble in polar aprotic solvents such as N, N-dimethylacetamide, N, N-dimethylformamide, dimethylsulfoxide, N-methylpyrrolidone. X-Ray diffraction studies showed that polyamides were amorphous in nature. The polyamides showed glass transition temperatures in the range 104-205 A degrees C, according to differential scanning calorimetry. Thermogravimetric analysis exhibited initial decomposition temperatures above 348 A degrees C; indicating that these polyamides possessed excellent thermal stability.

10apolyamides10aQuinoxaline10asolubility10aThermal properties10aXRD1 aPatil, Vidyadhar, B.1 aSayyed, Maheboob, M.1 aMahanwar, Prakash, A.1 aWadgaonkar, Prakash, P.1 aMaldar, Noormahamad, N. uhttps://library.ncl.res.in/content/polyamides-containing-quinoxaline-moiety-003033nas a2200229 4500008004100000022001400041245013300055210006900188260008700257300001200344490000700356520213200363653003002495653002102525653001502546653002002561653001502581100002802596700002102624700002802645856013002673 2011 eng d a0954-008300aSynthesis and characterization of new organosoluble aromatic polyamides and polyazomethines containing pendent pentadecyl chains0 aSynthesis and characterization of new organosoluble aromatic pol a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcNOV a494-5050 v233 a

New aromatic polyamides and polyazomethines containing pendent pentadecyl chains were synthesized by polycondensation of pentadecylbenzene-1,3-diamine with (i) four commercially available aromatic diacids, viz., biphenyl-4,4'dicarboxylic acid, 4,4'-oxybisbenzoic acid, terephthalic acid and isophthalic acid, and (ii) dialdehydes, viz., terephthaldehyde, isophthaldehyde and a 50 : 50 mol% mixture of terephthaldehyde, and isophthaldehyde, respectively. Inherent viscosities of polyamides and polyazomethines were in the range 0.35-0.56 dL g(-1) and 0.33-0.38 dL g(-1), respectively, indicating the formation of medium molecular weight polymers. The presence of pendent pentadecyl chains in polyamides and polyazomethines led to an improvement in their solubility in organic solvents. Polyamides could be cast into flexible, transparent and tough films from their solution in N,N-dimethylacetamide while polyazomethines could be solution cast into transparent, flexible and stretchable films from their CHCl(3) solution. (1)H-NMR studies based on amide proton signals and azomethine proton signals indicated the presence of constitutional isomerism in the polyamides and polyazomethines. Wide-angle X-ray diffraction patterns exhibited broad halo indicating that the polymers were amorphous in nature. X-ray diffractograms also displayed sharp reflections in the small angle region (2 theta approximate to 3 degrees) indicating the formation of layered structure arising from packing of flexible pentadecyl chains. The glass transition (T(g)) temperatures of polyamides were in the range 169-215 degrees C while T(g) values for polyazomethines were in the range 16-55 degrees C. The temperature for the 10% weight loss of polyamides and polyazomethines were in the range 430-460 degrees C and 425-440 degrees C, respectively, in a nitrogen atmosphere, which indicated their good thermal stability. Polyazomethines were also characterized by UV-Vis and photoluminescence spectroscopy and optical band gap (E(g)) values, calculated according to the maximum of the UV absorption, were found to be in the range 2.82-3.10 eV.

10aHigh performance polymers10aoptical band gap10apolyamides10apolyazomethines10asolubility1 aSadavarte, Nilakshi, V.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-organosoluble-aromatic-polyamides-and-polyazomethines-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

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.

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