@article {46596, title = {Partially bio-based furyl-functionalized organosoluble poly(ether ether ketone)s}, journal = {Polymer International}, volume = {70}, year = {2021}, month = {AUG}, type = {Article}, abstract = {

A new series of partially bio-based (co)poly(ether ether ketone)s bearing pendent furyl groups was synthesized by nucleophilic aromatic substitution polycondensation of varying molar proportions of 4,4 {\textquoteleft}-(furan-2-ylmethylene)bis(2-methoxyphenol) and bisphenol-A with 4,4 {\textquoteleft}-difluorobenzophenone. The chemical structures, compositions and random nature of (co)poly(ether ether ketone)s were confirmed by NMR spectroscopy. Inherent viscosities and number-average molecular weights of the (co)poly(ether ether ketone)s were in the range 0.74-2.90 dL g(-1) and 33 500-46 300 g mol(-1), respectively, indicating the formation of reasonably high molecular weight polymers. (Co)poly(ether ether ketone)s were readily soluble in common organic solvents and could be cast into tough, transparent and flexible films from chloroform solutions. (Co)poly(ether ether ketone)s exhibited 10\% weight loss and glass transition temperatures in the range 429-464 and 152-156 degrees C, respectively. A representative copoly(ether ether ketone) was crosslinked with 1,1 {\textquoteleft}-(methylenedi-1,4-phenylene)bismaleimide via Diels-Alder reaction to form a crosslinked polymer which showed improved mechanical properties and was recycled twice without significant loss of mechanical properties. Diels-Alder/retro Diels-Alder reaction was demonstrated by studies of sol-gel transformation, solubility tests, DSC and stress-strain measurements. (c) 2020 Society of Chemical Industry

}, keywords = {aromatic poly(ether ether ketone)s, bio-based, crosslinking, Diels-Alder reaction, pendent furyl groups}, issn = {0959-8103}, doi = {10.1002/pi.6160}, author = {Kuhire, Sachin S. and Talanikar, Aniket A. and Tawade, V, Bhausaheb and Nagane, Samadhan S. and Wadgaonkar, Prakash P.} } @article {49317, title = {Catechol- and phenolic hydroxyl-functionalized partially bio-based (Co) poly(ether sulfone)s with multifarious applicability}, journal = {European Polymer Journal}, volume = {220}, year = {2024}, month = {NOV}, pages = {113484}, type = {Article}, abstract = {

A largely bio-based new bisphenol, namely, 4,4 {\textquoteleft}-((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.

}, keywords = {(Co)poly(ether sulfone)s, adhesive, Antimicrobial, Antioxidant, bio-based, bisphenol, Zinc-ion batteries}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2024.113484}, author = {Wale, Apparav K. and Jagtap, Ashish S. and Pandey, Priyanshi R. and Dastager, Syed G. and Shelke, Manjusha V. and Ambade, Ashootosh V. and Wadgaonkar, Prakash P.} } @article {49618, title = {Methoxyl-containing hyper-crosslinked polymer from largely bio-based biphenyl methyl ether and its application in lithium-sulfur battery}, journal = {Reactive \& Functional Polymers}, volume = {207}, year = {2025}, month = {FEB}, pages = {106139}, type = {Article}, abstract = {

A new biphenyl methyl ether viz 2,2 {\textquoteleft},3,3 {\textquoteleft}-tetramethoxy-5,5 {\textquoteleft}-bis(methoxymethyl)-1,1 {\textquoteleft}-biphenyl (TBMB) was synthesized starting from vanillin via three-step reaction sequence. The self-polycondensation of TBMB by employing two Bronsted acid catalysts, viz, p- toluenesulfonic acid (PTSA) and trifluoromethanesulfonic acid (TFSA) led to the formation of organic hyper-crosslinked polymers (HCPs) containing built-in methoxyl groups. HCPs were characterized by FTIR, solid state 13 C NMR, XPS, XRD, TGA, BET, and FESEM analysis techniques. HCPs synthesized using PTSA (HCP-PTSA) and TFSA (HCP-TFSA) exhibited a Brunauer-Emmett-Teller (BET) surface area of 480 +/- 5 and 590 +/- 4 m2/g, respectively and consisted of hierarchical pore structures with both micropores and mesopores. HCP-TFSA was evaluated as an active coating layer on conventional polypropylene (PP) separator in lithium-sulfur batteries to suppress the polysulfide shuttling on account of the ability of methoxyl groups to anchor soluble polysulfide species via coordination. The significant polysulfide adsorption capacity and improved cycling stability with a capacity of 617.2 mAh g- 1 at 0.5C and 99\% capacity retention highlighted the potential of porous HCP containing built-in methoxyl groups in the development of attractive lithium-sulfur battery systems.

}, keywords = {Active coating layer, bio-based, Biphenyl methyl ether, Hyper-crosslinked polymer, lithium-sulfur battery, Methoxyl groups, Self-polycondensation}, issn = {1381-5148}, doi = {10.1016/j.reactfunctpolym.2024.106139}, author = {Wale, Apparav K. and Das, Anoushka K. and Patil, Nita R. and Shelke, V. Manjusha and Ambade, V. Ashootosh and Wadgaonkar, Prakash P.} }