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Oxygen barrier properties of PET copolymers containing bis(2‐hydroxyethyl)hydroquinones
Author(s) -
Andrade Genara S.,
Collard David M.,
Schiraldi David A.,
Hu Yushan,
Baer Eric,
Hiltner Anne
Publication year - 2003
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.12144
Subject(s) - comonomer , copolymer , dimethyl terephthalate , polymer chemistry , materials science , oxygen permeability , solubility , ethylene glycol , oxygen , polymerization , ethylene , polymer , chemistry , organic chemistry , catalysis , composite material
Abstract A series of poly[ethylene‐ co ‐bis(2‐ethoxy)hydroquinone terephthalate], PET‐ co ‐BEHQ copolymers were prepared by polymerization of various substituted bis(2‐hydroxyethyl)hydroquinones (BEHQs), dimethyl terephthalate (DMT), and ethylene glycol (EG). In addition to copolymers containing 6–16.5 mol % BEHQ, the homopolymer of BEHQ with dimethyl terephthalate, p(BEHQ‐T), was also prepared. The thermal and barrier properties of amorphous materials were studied. As the amount of comonomer was increased, the T g and T m of the materials decreased relative to those of PET. Oxygen permeability also decreased with increasing comonomer content. This improvement in barrier‐to‐oxygen permeability was primarily due to a decrease in solubility of oxygen in the polymer. All of the copolymers tested displayed similar oxygen diffusion coefficients. The decrease in solubility correlates with the decrease in T g . © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 934–942, 2003