01965nas a2200253 4500008004100000022001400041245011400055210006900169260009800238300001200336490000700348520099500355653000601350653005601356653002801412653001401440653002001454100001601474700001801490700002101508700002801529700002301557856013101580 2005 eng d a0959-810300aSynthesis and characterization of aromatic polyamides containing an s-triazine ring with thiophenoxy linkages0 aSynthesis and characterization of aromatic polyamides containing aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcMAR a569-5750 v543 a

A series of aromatic polyamides containing an s-triazine ring with thiophenoxy linkages was synthesized from two new diacids, namely 2,4-bis-(4-carboxyphenoxy)-6-thiophenoxy-s-triazine and 2,4-bis-(3-carboxyphenoxy)-6-thiophenoxy-s-triazine, and commercially available aromatic diamines by using Yamazaki's phosphorylation reaction. The polyamides were obtained in good yields and were characterized by solubility tests, viscosity measurements, FTIR, H-1 and C-13 NMR spectroscopy, X-ray diffraction studies and thermogravimetric analysis. The polyamides were found to have inherent viscosities in the range of 0.35 to 0.56 dl g(-1) in N,N-dimethylacetamide (DMAc) at 30 +/- 0.1 degreesC. All the polyamides were readily soluble in solvents such as DMAc, N-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF) and m-cresol. Thermogravimetric analysis of the polyamides indicated no weight loss below 345 degreesC under a nitrogen atmosphere. (C) 2004 Society of Chemical Industry.

10a210a4-bis-(3/4-carboxyphenoxy)-6-thiophenoxy-s-triazine10adirect polycondensation10apolyamide10as-triazine ring1 aPal, R., R.1 aPatil, P., S.1 aSalunkhe, M., M.1 aMaldar, Noormahamad, N.1 aWadgaonkar, P., P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-aromatic-polyamides-containing-s-triazine-ring-thiophenoxy-002480nas a2200277 4500008004100000022001400041245010800055210006900163260007400232300001200306490000700318520145600325653000601781653002501787653004101812653003101853653004301884653001701927653001501944653002201959100002001981700001902001700002302020700002802043856013102071 2009 eng d a1388-615000aSynthesis and thermal properties of soluble silicon containing phenylated aromatic-aliphatic polyamides0 aSynthesis and thermal properties of soluble silicon containing p aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcNOV a539-5450 v983 a

Aromatic polyamides find many applications in diverse and critical areas due to their high thermal stability coupled with high mechanical properties. However most of such aramides are difficult to fabricate because of their limited solubility and high melting temperature. Improvements in processability have been reported by incorporating bulky pendant groups and aliphatic spacer groups. Similarly to improve the solubility of polymers approaches of incorporating silicon in main polymer chain and co-polymerization techniques were useful. We report the synthesis and characterization of a series of phenylated silicon containing aromatic-aliphatic polyamides from a mixture of 2, 5-bis (4-carboxy methylene phenyl)-3, 4-diphenyl thiophene (CMPDT) and bis-(4-carboxy phenyl) dimethyl silane (BCPDS) in various mole proportions, with commercial aromatic diamine. Thus a series of novel co-polyamides having pendant phenyl groups, methylene spacer and silicon moiety was prepared by judicious combination of (CMPDT); BCPDS and aromatic diamine; bis-(4-aminophenyl) ether (ODA), by direct polycondensation using Yamazaki's phosphorylation method. These high molecular mass polyamides were obtained in high (89-98%) yields and had viscosities in the range of 0.23-0.57 dL/g in DMAc. Polyamides showed improved solubility in polar aprotic solvents, like NMP, DMAc, DMSO and DMF; had high thermal stability; with no mass loss below 335 A degrees C.

10a210a4-diphenyl thiophene10a5-bis (4-carboxy methylene phenyl)-310abis-(4-amino phenyl) ether10abis-(4-carboxy phenyl) dimethyl silane10aCopolyamides10asolubility10athermal stability1 aGhanwat, A., A.1 aSayyed, M., M.1 aWadgaonkar, P., P.1 aMaldar, Noormahamad, N. uhttps://library.ncl.res.in/content/synthesis-and-thermal-properties-soluble-silicon-containing-phenylated-aromatic-aliphatic-002935nas a2200277 4500008004100000022001400041245015100055210006900206260007300275300001200348490000800360520184600368653000602214653005402220653004302274653002402317653003302341653001502374653002302389100001802412700001402430700003002444700002302474700002802497856013202525 2010 eng d a0921-510700aSynthesis and characterization of polyesters from 2,3-bis (4 `-hydroxy phenyl) quinoxaline and 2,3-bis (2 `-hydroxynaphthalene-6 `-yl) quinoxaline0 aSynthesis and characterization of polyesters from 23bis 4 hydrox aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR a186-1920 v1683 a

Two bisphenols containing pendant, quinoxaline moiety; 2,3-bis (4'-hydroxy phenyl) quinoxaline (BHPQ) and 2,3-bis (2'-hydroxynaphthalene-6-yl) quinoxaline (BHNQ) were synthesized and characterized by FT-IR, (1)H, (13)C NMR and mass spectrometry. Aromatic polyesters and copolyesters were prepared by interfacial polymerization from BHPQ or BHNQ and isophthaloyl chloride or terephthaloyl chloride or a mixture of different mole proportions of (IPC + TPC). These polyesters and copolyesters were characterized by spectroscopic technique, viscosity measurement, solubility, thermal stability. DSC and XRD. Polymers had moderate to high molecular weights as evidenced by the inherent viscosities in the range 0.35-0.78 dL/g for BHPQ series and 0.27-0.52 dL/g for BHNQ series. BHPQ polyesters and copolyesters dissolved in m-cresol, NMP and conc. H(2)SO(4) whereas, BHNQ polyesters and copolyesters were readily soluble in NMP, DMAc, (TCE + phenol) and partly soluble in solvent like CHCl(3), pyridine, etc. Wide angle X-ray diffraction (WAXD) results showed that introduction of quinoxaline moiety into polymer chain and aromatic phenyl/rigid naphthyl structures lead to crystalinity. Differentional scanning calorimetry of BHNQ polyesters showed the glass transition temperatures in the range of 131-151 degrees C. BHPQ polyesters did not show any weight loss below 330 degrees C and retained 27-55% weight at 900 degrees C when investigated by TGA under nitrogen atmosphere demonstrating good thermal stability BHNQderived polyesters showed initial decomposition temperatures in range 211-234 degrees C. The structure-property relationships for the mentioned polyesters are analyzed, as these polyesters are of interest as materials for electronics, microelectronics and membrane separation. (C) 2009 Elsevier B.V. All rights reserved.

10a210a3-Bis (2 `-hydroxynaphthalene-6 `-yl) quinoxaline10a3-Bis (4 `-hydroxy phenyl) quinoxaline10aAromatic polyesters10aGlass transition temperature10asolubility10aThermal properties1 aPatil, V., B.1 aMedhi, M.1 aBhairamadgi, Nagendra, S.1 aWadgaonkar, P., P.1 aMaldar, Noormahamad, N. uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyesters-23-bis-4-hydroxy-phenyl-quinoxaline-and-23-bis-2-0