@article {46059,
	title = {New cardo bisphenol monomer containing pendant azido group and the resulting aromatic polyesters},
	journal = {Journal of Polymer Science Part A-Polymer Chemistry},
	volume = {57},
	year = {2019},
	month = {JUL },
	pages = {1516-1526},
	type = {Article},
	abstract = {<p>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.</p>
},
	keywords = {aromatic (co)polyester, azido group, cardo bisphenol, Chemical modification},
	issn = {0887-624X},
	doi = {10.1002/pola.29414},
	author = {Maher, Deepak M. and Nagane, Samadhan S. and Jadhav, Uday A. and Salunkhe, Pravin H. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.}
}
@article {48947,
	title = {Norbornenyl-pendant aromatic (co)poly(ether ether ketone)s},
	journal = {Journal of macromolecular science part A- pure and applied chemistry},
	volume = {60},
	year = {2023},
	month = {NOV },
	pages = {790-800},
	type = {Journal Article},
	abstract = {<p>4, 4{\textquoteright}-(Bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) was utilized as a step-growth monomer for the synthesis of (co)poly(ether ether ketone)s (PEEK-NBs) via nucleophilic aromatic substitution polycondensation. A homo and five PEEK-NBs were synthesized by polycondensation of 4, 4{\textquoteright}-difluorobenzophenone with BPA-NB and various compositions of BPA-NB and bisphenol-A, respectively. H-1 NMR spectroscopy confirmed the chemical structure and composition of PEEK-NBs. Inherent viscosity and number-average molecular weight values of PEEK-NBs were in the range 0.64 to 0.78 dL g(-1) and 62,670 to 84,470 g mol(-1), respectively, indicating the formation of polymers of reasonably high molecular weight. It was easy to dissolve PEEK-NBs in common organic solvents such as chloroform, dichloromethane, and tetrahydrofuran. Tough, transparent, and flexible films of PEEK-NBs could be cast from chloroform solution. X-Ray diffraction studies indicated amorphous nature of PEEK-NBs. Glass transition temperature (T-g) values, determined by DSC analysis, of PEEK-NBs were in the range 163 to190 degrees C and T-g values increased with the increase in mol \% of BPA-NB. The post-polymerization modification of a representative PEEK-NB was demonstrated using two azido compounds, namely, 4-(azidomethyl)-7-methoxy-2H-chromen-2-one and 9-(azidomethyl)anthracene, via metal-free azide-alkene 1,3-dipolar cycloaddition reaction to obtain copoly(ether ether ketone)s appended with coumarinyl and anthracenyl moieties, respectively.</p>
},
	keywords = {(Co)poly(ether ether ketone)s, azide-alkene click reaction, norbornenyl groups, post-polymerization modification},
	issn = {1060-1325},
	doi = {10.1080/10601325.2023.2261462},
	author = {Talanikar, Aniket A. and Nagane, Samadhan S. and Wadgaonkar, Prakash P. and Rashinkar, Gajanan S.}
}
