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Synthesis and randomization of well‐defined sequence, wholly aromatic copolyester/esteramides
Author(s) -
Choe EuiWon,
Borzo Marie
Publication year - 1994
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.1994.070530513
Subject(s) - copolyester , condensation polymer , monomer , polymer chemistry , hydroquinone , triad (sociology) , copolymer , materials science , polymerization , polymer , phenylene , chemistry , organic chemistry , polyester , composite material , psychology , psychoanalysis
Well‐defined sequence, wholly aromatic copolyester/esteramides have been synthesized by an interfacial polycondensation of a preformed triad diacid chloride monomer, di( para ‐chlorocarbonylphenyl)isophthalate, with the disodium salt of hydroquinone or of deuterated hydroquinone, or with meta ‐phenylene diamine. Carbon‐13 nuclear magnetic resonance (NMR) spectroscopy provided unequivocal evidence for regularly alternating polymer structures, and coupled with statistical methods, for randomization on heating in the case of regularly alternating poly( p ‐oxybenzoate‐ co‐p ‐phenylene isophthalate). Polymers synthesized using standard high‐temperature melt‐polymerization techniques were shown by statistical/carbon‐13 NMR methods to have essentially random structures. Thermal properties of copolymer powders and films were found to vary with monomer sequence distribution as well as with composition. © 1994 John Wiley & Sons, Inc.