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Synthesis and characterization of new aromatic polyesters containing biphenyl side groups
Author(s) -
Honkhambe Pandurang N.,
Avadhani C. V.,
Wadgaonkar Prakash P.,
Salunkhe Manikrao M.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25862
Subject(s) - polyester , tetrahydrofuran , terephthaloyl chloride , polymer chemistry , glass transition , dichloromethane , materials science , biphenyl , chloroform , condensation polymer , isophthalic acid , chloride , thermal stability , organic chemistry , polymer , chemistry , terephthalic acid , solvent
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‐pyrrolidinone. 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°C, while the initial degradation temperature of polyesters were in the range 444–481°C. Copolyesters derived from BBHPE exhibited improved solubility and higher glass transition temperatures compared to the corresponding polyesters based on BPA. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007