02073nas a2200205   4500008004100000022001400041245009400055210006900149260006800218300001400286490000800300520127700308653002401585653002501609100002901634700002101663700002801684700002701712856012801739       2007                        eng d  a0021-899500aSynthesis and characterization of new aromatic polyesters containing biphenyl side groups0 aSynthesis and characterization of new aromatic polyesters contai  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcDEC  a3105-31100 v1063 a<p>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.</p>10aAromatic polyesters10abiphenyl side groups1 aHonkhambe, Pandurang, N.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P.1 aSalunkhe, Manikrao, M.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-aromatic-polyesters-containing-biphenyl-side-groups-002403nas a2200241   4500008004100000022001400041245009600055210006900151260006800220300001400288490000800302520148600310653002401796653001401820653003301834653002701867100002901894700002301923700003001946700002801976700002702004856013002031       2010                        eng d  a0021-899500aSynthesis and characterization of new aromatic polyesters containing pendent naphthyl units0 aSynthesis and characterization of new aromatic polyesters contai  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcSEP  a2545-25520 v1173 a<p>Two bisphenols, viz., 4,4'-[1-(2-naphthaleny-1)ethylidene]bisphenol and 4,4'-[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</p>10aAromatic polyesters10abisphenol10ainterfacial polycondensation10apendent naphthyl units1 aHonkhambe, Pandurang, N.1 aBiyani, Mahesh, V.1 aBhairamadgi, Nagendra, S.1 aWadgaonkar, Prakash, P.1 aSalunkhe, Manikrao, M.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-aromatic-polyesters-containing-pendent-naphthyl-units-0