02240nas a2200241   4500008004100000022001400041245017200055210006900227260010600296300001400402490000700416520120000423653002801623653002301651653003801674653003001712100002401742700002201766700002701788700002801815700002801843856012701871       2007                        eng d  a0014-305700aSynthesis of aromatic poly(amide-imide)s from novel diimide-diacid (DIDA) containing sulphone and bulky pendant groups by direct polycondensation with various diamines0 aSynthesis of aromatic polyamideimides from novel diimidediacid D  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcDEC  a5047-50540 v433 a<p>A novel diimide-diacid (DIDA) monomer, 4-{4-[(4-methyl phenyl) sulphonyl]}-1,3-bis-trimellitoimido benzene containing sulphone and bulky pendant groups was successfully synthesized and used to synthesize a series of wholly aromatic poly(amide-imide)s (PAIs) by direct polycondensation method. The direct polycondensation of newly synthesized DIDA with different diamines was carried Out via Yamazaki's phosphorylation method using triphenyl phosphite and pyridine system. The resulting poly(amide-imide)s were obtained in quantitative yields with inherent viscosities 0.36-0.47 dl/g in DMAc at 30 +/- 0.1 degrees C. The poly(amide-imide)s were amorphous and were readily soluble in various solvents such as N-methyl-2-pyrrolidinone (NMP), NN-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), and pyridine. Tough and flexible films were obtained by casting their DMAc solution. According to thermogravimetric analysis, the polymers were fairly stable up to temperature around 396 degrees C, and 10% weight losses in the temperature range of 476-511 degrees C that showed good thermal stabilities of these polymers. (c) 2007 Elsevier Ltd. All rights reserved.</p>10adirect polycondensation10apoly(amide-imide)s10asulphone and bulky pendant groups10athermally stable polymers1 aPatil, Prashant, S.1 aPal, Ravindra, R.1 aSalunkhe, Manikrao, M.1 aMaldar, Noormahamad, N.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/synthesis-aromatic-polyamide-imides-novel-diimide-diacid-dida-containing-sulphone-and-001855nas a2200229   4500008004100000022001400041245009800055210006900153260009800222300001400320490000700334520097100341653001901312653002101331653003001352100002601382700002501408700001801433700002101451700002301472856013001495       2009                        eng d  a1042-714700aSynthesis and properties of new polybenzoxazines containing (substituted) cyclohexyl moieties0 aSynthesis and properties of new polybenzoxazines containing subs  aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcDEC  a1107-11130 v203 a<p>A series of new polybenzoxazines were synthesized based on diphenols containing (substituted) cyclohexyl moiety and were characterized by FT-IR, (1)H-NMR, and (13)C-NMR spectroscopy. These new benzoxazine monomers exhibited better processability with lower peak cure temperature and a wide cure controllable window (CCW) as manifested in differential scanning calorimetric analysis. The cure analysis was performed by FT-IR spectroscopy. Glass transition temperature of new polybenzoxazines varied from 170 to 205 degrees C. The cyclohexyl bridge groups facilitated ring opening, resulting in polymer with improved thermal stability in comparison to bisphenol A-based benzoxazine as assessed by the various thermal analyses. The water contact angles of polybenzoxazines containing (substituted) cyclohexyl moieties were higher than that of bisphenol A-based polybenzoxazine, implying their higher hydrophobicity. Copyright (C) 2009 John Wiley &amp; Sons, Ltd.</p>10aHydrophobicity10apolybenzoxazines10athermally stable polymers1 aKumar, K., S. Santhos1 aNair, C., P. Reghuna1 aNinan, K., N.1 aKulkarni, A., D.1 aWadgaonkar, P., P.  uhttps://library.ncl.res.in/content/synthesis-and-properties-new-polybenzoxazines-containing-substituted-cyclohexyl-moieties-0