02437nas a2200253 4500008004100000022001400041245009100055210006900146260000900215300001200224490000700236520160100243653001701844653002001861653001701881653001501898653002001913100002501933700002301958700002101981700003002002700002802032856012302060 2019 eng d a0887-624X00aDesign and synthesis of aromatic polyesters bearing pendant clickable maleimide groups0 aDesign and synthesis of aromatic polyesters bearing pendant clic cMAR  a630-6400 v573 a

A bisphenol bearing pendant maleimide group, namely, N-maleimidoethyl-3, 3-bis(4-hydroxyphenyl)-1-isobenzopyrrolidone (PPH-MA) was synthesized starting from phenolphthalein. Aromatic (co)polyesters bearing pendant maleimide groups were synthesized from PPH-MA and aromatic diacid chlorides, namely, isophthaloyl chloride (IPC), terephthaloyl chloride (TPC), and 50:50 mol % mixture of IPC and TPC by low temperature solution polycondensation technique. Copolyesters were also synthesized by polycondensation of different molar proportions of PPH-MA and bisphenol A with IPC. Inherent viscosities and number-average molecular weights of aromatic (co)polyesters were in the range of 0.52-0.97 dL/g and 20,200-32,800 g/mol, respectively indicating formation of medium to reasonably high-molecular-weight polymers. C-13 NMR spectral analysis of copolyesters revealed the formation of random copolymers. The 10% weight loss temperature of (co)polyesters was found in the range 470-484 degrees C, indicating their good thermal stability. A selected aromatic polyester bearing pendant maleimide groups was chemically modified via thiol-maleimide Michael addition reaction with two representative thiol compounds, namely, 4-chlorothiophenol and 1-adamantanethiol to yield post-modified polymers in a quantitative manner. Additionally, it was demonstrated that polyester containing pendant maleimide groups could be used to form insoluble crosslinked gel in the presence of a multifunctional thiol crosslinker. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 630-640

10acrosslinking10amaleimide group10amodification10apolyesters10athiol-maleimide1 aNagane, Samadhan, S.1 aKuhire, Sachin, S.1 aJadhav, Uday, A.1 aDhanmane, Sushilkumar, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/design-and-synthesis-aromatic-polyesters-bearing-pendant-clickable-maleimide-groups02465nas a2200253 4500008004100000022001400041245010100055210006900156260000900225300001400234490000700248520158800255653002701843653001601870653002001886653002601906100002201932700002501954700002101979700002502000700002602025700002802051856013202079 2019 eng d a0887-624X00aNew cardo bisphenol monomer containing pendant azido group and the resulting aromatic polyesters0 aNew cardo bisphenol monomer containing pendant azido group and t cJUL  a1516-15260 v573 a

Expanding on our strategy to synthesize aromatic step-growth polymers containing pendant clickable azido groups via functional monomer approach, we have now designed and synthesized a new cardo bisphenol, viz., 2-(2-azidoethyl)-3, 3-bis(4-hydroxyphenyl) isoindolin-1-one (PPH-N-3). PPH-N-3 was conveniently synthesized starting from commercially available phenolphthalein by a three-step route in an overall yield of 65% using simple organic transformations. Aromatic (co)polyesters bearing pendant azido groups were synthesized by low-temperature solution polycondensation of PPH-N-3 or different molar ratios of PPH-N-3 and bisphenol-A (BPA) with aromatic diacid chlorides in dry dichloromethane in the presence of triethylamine (TEA) as a base. The formation of medium to reasonably high-molecular-weight (co)polyesters was evidenced from intrinsic viscosity and number-average molecular-weight measurements that were in the range 0.52-0.85 dL/g and 16,700-28,200, respectively. Tough, transparent, and flexible films could be cast from chloroform solutions of these (co)polyesters. (Co)polyesters were characterized using FTIR, H-1 NMR, C-13 NMR spectroscopy, XRD, and TGA. The thermal curing reaction of (co)polyesters involving decomposition of azido groups was studied by DSC analysis. The chemical modification of a representative copolyester containing pendant azido groups was carried out quantitatively using catalyst-free azide-maleimide cycloaddition reaction with two maleimides, namely, N-methylmaleimide and N-hexylmaleimide. (c) 2019 Wiley Periodicals, Inc.

10aaromatic (co)polyester10aazido group10acardo bisphenol10aChemical modification1 aMaher, Deepak, M.1 aNagane, Samadhan, S.1 aJadhav, Uday, A.1 aSalunkhe, Pravin, H.1 aTawade, Bhausaheb, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-cardo-bisphenol-monomer-containing-pendant-azido-group-and-resulting-aromatic-polyesters02531nas a2200265 4500008004100000022001400041245014600055210006900201260000900270300001100279490000800290520160100298653002501899653000901924653001801933653001501951653001701966100002701983700002102010700003402031700002502065700002202090700002802112856012502140 2021 eng d a0014-305700aPartially bio-based triarylamine-containing polyimides: synthesis, characterization and evaluation in non-volatile memory device applications0 aPartially biobased triarylaminecontaining polyimides synthesis c cMAR  a1103270 v1473 a

A new triarylamine-containing diamine, viz. 4, 4'-diamino-4 `' pentadecyltriphenylamine was synthesised starting from cashew nut shell liquid (CNSL) - a non-edible by-product of cashew processing industry. Three new partially bio-based triarylamine-containing polyimides were synthesised by one-step high temperature solution poly-condensation of 4, 4'-diamino-4 `' pentadecyltriphenylamine with aromatic dianhydrides, namely, 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), 4,4'-oxydiphthalic anhydride (ODPA) and 4,4'-(hexa-fluoroisopropylidene) diphthalic anhydride (6-FDA). Polyimides were determined to be of reasonably high molecular weights as inherent viscosity and number average molecular weights (M-n, Polystyrene standard) values were in the range 0.54-0.60 dL g(-1) and 26,800-43,500 g mol(-1), respectively. Polyimides exhibited excellent solubility in common organic solvents and film-forming nature along with reasonably good thermal properties as indicated by temperature for 10% weight loss (T-10) and glass transition temperatures (T-g) which were in the range 418-447 and 165-225 degrees C, respectively. The optical and electrochemical band-gap values were in the range of 1.95-1.98 eV and 1.671-1.745 eV, respectively. Among triarylamine-containing polyimide devices, BPDA-based device showed acceptable current-voltage and non-volatile memory properties such as the endurance of 500 cycles and 1000 s of retention time. The conduction mechanism developed in the memory devices was also explored and was found to follow Ohmic and Schottky conduction mechanisms.

10aBio-based polyimides10aCNSL10aMemory device10apentadecyl10aTriarylamine1 aChatterjee, Deepshikha1 aJadhav, Uday, A.1 aJavaregowda, Bharathkumar, H.1 aDongale, Tukaram, D.1 aPatil, Pramod, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/partially-bio-based-triarylamine-containing-polyimides-synthesis-characterization-and02482nas a2200277 4500008004100000022001400041245014400055210006900199260000800268300001200276490000800288520150900296653002801805653002301833653002801856653002101884653002401905100002101929700002501950700002101975700001701996700001802013700001902031700002802050856012602078 2022 eng d a1022-135200aSynthesis and characterization of partially biobased aromatic (Co)polycarbonates containing biphenylene units and pendant pentadecyl chains0 aSynthesis and characterization of partially biobased aromatic Co cJUL a21004490 v2233 a

2-Pentadecyl-[1,1''-biphenyl]-4,4''-diol (PBD) is synthesized starting from cashew nut shell liquid-a by-product of cashew processing industry. A new series of partially biobased aromatic (co)polycarbonates possessing biphenylene units and pendant pentadecyl chains is synthesized by solution polycondensation of PBD or varying compositions of PBD and bisphenol-A with triphosgene in dry dichloromethane. Inherent viscosities and number average molecular weights of (co)polycarbonates are in the range 0.51-1.24 dL g(-1) and 18 x 10(3)- 43.4 x 10(3) g mol(-1), respectively indicating the formation of reasonably high molecular weight polymers. Flexible, transparent, and free-standing films of (co)polycarbonates can be cast from chloroform solution. (Co)polycarbonates are characterized using Fourier transform infrared spectroscopy (FTIR), H-1 NMR, C-13 NMR spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry, and thermogravimetric analysis. T-10 and T-g values of (co)polycarbonates are in the range 417-433 and 8-147 degrees C, respectively. It is demonstrated that the T-g values can be tuned by incorporation of appropriate mol% of PBD as a comonomer in Bisphenol-A-based copolycarbonates. The lowering of the T-g values of (co)polycarbonates can be attributed primarily to the packing disruptive effect of flexible pentadecyl chains. Furthermore, the effect of incorporation of PBD as a comonomer on water contact angle values of (co)polycarbonates is evaluated.

10aaromatic polycarbonates10abiobased bisphenol10aCashew nut shell liquid10apentadecyl chain10aRenewable resources1 aIchake, Amol, B.1 aNagane, Samadhan, S.1 aJadhav, Uday, A.1 aTorris, Arun1 aGrau, Etienne1 aCramail, Henri1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-partially-biobased-aromatic-copolycarbonates-containing02939nas a2200145 4500008004100000245011700041210006900158260000800227490000700235520234800242100002102590700002502611700002802636856012902664 2023 eng d00aSynthesis, characterization and post-modification of aromatic (Co)polyesters possessing pendant maleimide groups0 aSynthesis characterization and postmodification of aromatic Copo cSEP0 v353 a

A new series of (co)polyesters possessing pendent maleimide groups was synthesized by low temperature solution polycondensation of 4, 4’-(5-maleimidopentane-2, 2-diyl) diphenol (BPA-MA) with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of TPC and IPC (50:50 mol %). Copolyesters were also synthesized by polycondensation of varying compositions of BPA-MA and bisphenol-A (BPA) with IPC. The chemical structures and compositions of (co)polyesters were confirmed by NMR spectroscopy. Inherent viscosity values and number-average molecular weights of (co)polyesters were in the range 0.50–0.76 dL/g and 17,700-32,100 g/mol, respectively, indicating the formation of reasonably high molecular weight polymers. (Co)polyesters were readily soluble in common organic solvents and could be cast into tough, transparent and flexible films from chloroform solutions. (Co)polyesters exhibited 10% weight loss and glass transition temperatures in the range 464–468 and 142–178°C, respectively. A representative copolyester possessing pendant maleimide groups was chemically modified via metal-free azide-maleimide 1,3-dipolar cycloaddition click reaction with two azido compounds, namely, (azidomethyl)benzene (Bz-N3) and 1-(azidomethyl)-pyrene (Py-N3) to yield corresponding modified copolyesters in a quantitative manner.

1 aJadhav, Uday, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-characterization-and-post-modification-aromatic-copolyesters-possessing-pendant