02784nas a2200241   4500008004100000022001400041245013400055210006900189260000900258300001100267490000800278520190300286653002902189653001402218653001902232653003102251653002302282100002602305700002502331700002802356700002702384856013102411       2022                        eng d  a0014-305700aPost-polymerization modifiable aromatic (co)poly(ether sulfone)s possessing pendant norbornenyl groups based upon a new bisphenol0 aPostpolymerization modifiable aromatic copolyether sulfones poss  cAUG   a1114310 v1763 a<p>
	A new bisphenol possessing pendant norbornenyl group viz., 4, 4 `-(bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) was synthesized by a single-step base-catalyzed condensation reaction of 5-norbor-nene-2-carboxaldehyde with guaiacol. NMR spectral data indicated formation of BPA-NB comprising of isomeric components. A series of (co)poly(ether sulfone)s possessing pendant norbornenyl groups was synthesized by nucleophilic aromatic substitution polycondensation of varying molar ratio of BPA-NB and bisphenol-A (BPA) with bis(4-fluorophenyl) sulfone. Inherent viscosity values and number average molecular weights of (co)poly (ether sulfone)s were in the range 0.67-1.01 dL/g and 75,400-1,16,300 g/mol, respectively indicating the formation of reasonably high molecular weight polymers. Tough, transparent, and flexible films could be cast from chloroform solutions of these (co)poly(ether sulfone)s. (Co)poly(ether sulfone)s were characterized using FT-IR, H-1 NMR and C-13 NMR spectroscopy, XRD, TGA and DSC analysis. The formation of random copoly(ether sulfone)s was demonstrated by( 13)C NMR analysis. The incorporation of BPA-NB into (co)poly(ether sulfone)s resulted into improvement in Tg values. BPA-NB-based (co)poly(ether sulfone)s offered possibilities for post -modifications involving either methoxyl or norbornenyl groups. A representative copoly(ether sulfone) (PSU-NB-2) possessing pendant norbornenyl groups was chemically modified via thiol-ene reaction with three representative thiol compounds, namely, 1-dodecanethiol, 2-furanmethanethiol and 2-mercaptoethanol to yield corresponding post-modified polymers in a quantitative manner. Additionally, it was demonstrated that copoly (ether sulfone) possessing pendant norbornenyl groups could be used to form insoluble cross-linked gel in the presence of a multifunctional thiol cross-linker.</p>
10a(Co)poly(ether sulfone)s10abisphenol10aCross -linking10aPendant norbornenyl groups10aThiol-ene reaction1 aTalanikar, Aniket, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S.  uhttps://library.ncl.res.in/content/post-polymerization-modifiable-aromatic-copolyether-sulfones-possessing-pendant-norbornenyl02477nas a2200301   4500008004100000022001400041245012900055210006900184260000800253300001100261490000800272520146800280653002901748653001301777653001801790653001601808653001401824653001401838653002301852100002201875700002301897700002601920700002301946700002501969700002601994700002802020856012702048       2024                        eng d  a0014-305700aCatechol- and phenolic hydroxyl-functionalized partially bio-based (Co) poly(ether sulfone)s with multifarious applicability0 aCatechol and phenolic hydroxylfunctionalized partially biobased   cNOV  a1134840 v2203 a<p>
	A largely bio-based new bisphenol, namely, 4,4 `-((3,4-dimethoxyphenyl)methylene)-bis(2-methoxyphenol) (DMBM) was synthesized by the reaction of veratraldehyde with guaiacol. DMBM and varying compositions of DMBM and bisphenol A were polycondensed with bis(4-fluorophenyl) sulfone to afford reasonably high molecular weight film-forming (co)poly(ether sulfone)s possessing built-in methoxyl groups. T10 and Tg values of (co)poly(ether sulfone)s were in the range 382-478 degrees C and 171-187 degrees C, respectively indicating their good thermal stability and the values decreased with increase in mol % incorporation of DMBM. The methoxyl groups present in (co)poly (ether sulfone)s were quantitatively de-blocked resulting in the formation of corresponding polymers possessing pendant catechol moieties and free phenolic hydroxyl groups. By virtue of the presence of these functional moieties, (co)poly(ether sulfone)s are amenable for post-polymerization modifications, and exhibited properties such as antimicrobial (23 mm against Staphylococcus aureus and 18 mm against Escherichia coli)), antioxidant (72 % scavenger of free radicals), adhesive (2.24 MPa lap shear strength) and usefulness as redox-active agent in zinc-ion batteries. These data underscore the promise of DMBM as a versatile monomer of wider utility for the synthesis of functional (co)poly(ether sulfone)s capable of expanding their applicability beyond the conventional ones.</p>
10a(Co)poly(ether sulfone)s10aadhesive10aAntimicrobial10aAntioxidant10abio-based10abisphenol10aZinc-ion batteries1 aWale, Apparav, K.1 aJagtap, Ashish, S.1 aPandey, Priyanshi, R.1 aDastager, Syed, G.1 aShelke, Manjusha, V.1 aAmbade, Ashootosh, V.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/catechol-and-phenolic-hydroxyl-functionalized-partially-bio-based-co-polyether-sulfones