@article { ISI:000250410500033, title = {Synthesis and characterization of new aromatic polyesters containing biphenyl side groups}, journal = {Journal of Applied Polymer Science}, volume = {106}, number = {5}, year = {2007}, month = {DEC}, pages = {3105-3110}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Aromatic polyesters containing biphenyl side groups were synthesized by phase-transfer catalyzed interfacial polycondensation of 1-(4-biphenylyl)-1,1-bis(4-hydroxyphenyl) ethane (BBHPE) with terephthaloyl chloride (TPC), isophthaloyl chloride (IPC), and a mixture of TPC/IPC (50: 50 mol ratio). Copolyesters were synthesized by utilizing different molar proportions of BBHPE and 4,4-isopropylidenediphenol (BPA) with IPC and TPC. The inherent viscosities of polyesters were in the range 0.44-1.26 dL/g. All the polyesters were soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, meta-cresol, pyridine, N,N-dimethylformamide, N,N-dimethylacetamide, and 1-methyl-2-pyrrolidmone. Tough, transparent, and flexible films could be cast from chloroform solutions of these polyesters. WAXD measurements indicated that all the polyesters and copolyesters were amorphous in nature. Glass transition temperature of polyesters were in the range 198-256 degrees C, while the initial degradation temperature of polyesters were in the range 444-481 degrees C. Copolyesters derived from BBHPE exhibited improved solubility and higher glass transition temperatures compared to the corresponding polyesters based on BPA. (c) 2007 Wiley Periodicals, Inc.

}, keywords = {Aromatic polyesters, biphenyl side groups}, issn = {0021-8995}, doi = {10.1002/app.25862}, author = {Honkhambe, Pandurang N. and Avadhani, C. V. and Wadgaonkar, Prakash P. and Salunkhe, Manikrao M.} } @article { ISI:000279996500008, title = {Synthesis and characterization of new aromatic polyesters containing pendent naphthyl units}, journal = {Journal of Applied Polymer Science}, volume = {117}, number = {5}, year = {2010}, month = {SEP}, pages = {2545-2552}, publisher = {JOHN WILEY \& SONS INC}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Two bisphenols, viz., 4,4{\textquoteright}-[1-(2-naphthaleny-1)ethylidene]bisphenol and 4,4{\textquoteright}-[1-(2-naphthalenyl) ethylidene]bis-3-methylphenol were prepared by condensation of commercially available 2-acetonaphthanone with phenol and o-cresol, respectively. A series of new aromatic polyesters containing pendent naphthyl units was synthesized by phase-transfer-catalyzed interfacial polycondensation of these bisphenols with isophthaloyl chloride, terephthaloyl chloride, and a mixture of isophthaloyl chlorideiterephthaloyl chloride (50 : 50 mol \%). Inherent viscosities of polyesters were in the range 0.83-1.76 dL g(-1), while number average molecular weights (M(n)) were in the range 61,000-235,000 g mol(-1). Polyesters were readily soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, m-cresol, pyridine, N,N-dimethylformamide, N,N-dimethylacetarnide, and 1-methyl-2-pyrrolidinone at room temperature. Tough, transparent, and flexible films were cast from a solution of polyesters in chloroform. X-Ray diffraction measurements displayed a broad halo at 20 congruent to 19 degrees indicating the amorphous nature of polyesters. Glass transition temperatures of polyesters were in the range 209-259 degrees C. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, of polyesters was in the range 435-500 degrees C indicating their good thermal stability. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 117: 2545-2552, 2010

}, keywords = {Aromatic polyesters, bisphenol, interfacial polycondensation, pendent naphthyl units}, issn = {0021-8995}, doi = {10.1002/app.32162}, author = {Honkhambe, Pandurang N. and Biyani, Mahesh V. and Bhairamadgi, Nagendra S. and Wadgaonkar, Prakash P. and Salunkhe, Manikrao M.} } @article { ISI:000351153700001, title = {Processable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization}, journal = {Journal of Polymer Research}, volume = {21}, number = {12}, year = {2014}, month = {NOV}, pages = {617}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

A new bisphenol viz., 4-(4-hydroxyphenoxy)-3-pentadecylphenol (HPPDP) was synthesized starting from cashew nut shell liquid (CNSL). Aromatic (co)polyesters containing ether linkages in the main chain and pendent pentadecyl chains were synthesized by the interfacial polycondensation of HPPDP with terephthalic acid chloride (TPC), isophthalic acid chloride (IPC) and a mixture of TPC and IPC (50: 50 mol \%) and by polycondenation of varying composition of HPPDP and bisphenol-A (BPA) with TPC. The resultant (co) polyesters exhibited inherent viscosities in the range 0.70-1.21 dL g(-1) and number-average molecular weights in the range 16,000-48,200 (GPC, polystyrene standard). Polyesters were soluble in common organic solvents such as chloroform and dichloromethane and could be cast into films from chloroform solution. Polyesters exhibited T-10 values in the range 430-455 degrees C and Tg values were in the range 29-202 degrees C. Dynamic mechanical storage modulus and maximum on transition of tan delta curve decreased with increased content of HPPDP in copolyesters. Importantly, the large difference between Tg and T-10 values offers the possibility to process these polyesters in the melt.

}, keywords = {Aromatic polyesters, Cashew nut shell liquid, pentadecyl, Polycondensation, processability, Thermal properties}, issn = {1022-9760}, doi = {10.1007/s10965-014-0617-y}, author = {Tawade, Bhausaheb V. and Salunke, Jagadish K. and Sane, Prakash S. and Wadgaonkar, Prakash P.} } @article {45702, title = {Aromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups: synthesis and characterization}, journal = {Journal of Polymer Research}, volume = {24}, year = {2017}, month = {MAR }, pages = {57}, type = {Article}, abstract = {

A new bisphenol, 1,1-bis-[(4-hydroxyphenyl)-1-(4-phenylsulfonyl) phenyl)] ethane (DPSBP) was synthesized starting from diphenylsulfide and was characterized by spectroscopic methods. DPSBP was polycondensed with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of IPC and TPC (50: 50 mol\%) by phase-transfer catalysed interfacial polymerization method to obtain aromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups. A series of copolyesters was also obtained by polycondensation of varying molar proportions of DPSBP and bisphenol-A (BPA) with TPC. (Co) polyesters exhibited inherent viscosities in the range 0.56-1.57 dLg(-1) and number average molecular weights (Mn) were in the range 28,650-80,230 g/mol. Polyesters dissolved readily in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran and aprotic polar solvents such as N-methylpyrrolidone, and N, N-dimethylacetamide. Tough, transparent and flexible films of polyesters could be cast from their chloroform solutions. X-Ray diffraction studies indicated amorphous nature of aromatic polyesters. Polyesters showed T-g values in the range 223-257 degrees C while T-10 values were in the range of 469-484 degrees C indicating their excellent thermal stability.

}, keywords = {Aromatic polyesters, Bulky pendent group, solubility, thermal stability}, issn = {1022-9760}, doi = {10.1007/s10965-017-1217-4}, author = {Bapat, Snehalata P. and Jadhav, Sushilkumar A. and Valsange, Nitin G. and Tawade, Bhausaheb V. and Honkhambe, Pandurang N. and Chavan, Nayaku N. and Wadgaonkar, Prakash P.} } @article {49842, title = {Utilization of bisphenol based on lignin-derived chemicals for the synthesis of partially bio-based aromatic copolyesters}, journal = {Journal of Macromolecular Science Part A-Pure and Applied Chemistry}, volume = {63}, year = {2026}, month = {JAN}, pages = {83-90}, type = {Article}, abstract = {

New aromatic copolyesters were synthesized by phase-transfer catalyzed interfacial polycondensation of 4,4 {\textquoteleft}-((3,4-dimethoxyphenyl)methylene)bis(2-methoxyphenol) (DMBM) with isophthaloyl chloride (IPC) and a mixture of (50:50 mol \%) IPC and terephthaloyl chloride (TPC). Additionally, a series of copolyesters was synthesized by polycondensation of varying compositions of DMBM and bisphenol A with IPC. Copolyesters exhibited inherent viscosity and Mn values in the range 0.59-0.98 dL/g and 15,840-49,460 g/mol, respectively, indicating formation of reasonably high molecular weight polymers. Copolyesters could be cast into tough, transparent and flexible films from chloroform solution. UV-vis measurements on films gave values of T400, T450 and cut-off wavelength in the range 80-84 \%, 83-89 \% and 324-334 nm, respectively. The formation of random copolyesters was evidenced by 13C NMR spectroscopic studies. Copolyesters exhibited good thermal stability with 10\% weight loss temperature in the range 391-438 degrees C. The Tg values of copolyesters were in the range 162-180 degrees C and Tg values decreased with an increase in mol\% content of DMBM. Copolyesters exhibited tensile strength, Young{\textquoteright}s modulus and elongation at break values in the range 83.55-70.68 MPa, 2.11-1.31 GPa and 10.52-5.45 \%, respectively.

}, keywords = {Aromatic polyesters, bio-based, bisphenol, methoxyl, Thermal properties}, issn = {1060-1325}, doi = {10.1080/10601325.2025.2589929}, author = {Wale, Apparav K. and Ambade, Ashootosh V. and Wadgaonkar, Prakash P.} }