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Ageing of poly(ethylene terephthalate) and poly(ethylene naphthalate) under moderately accelerated conditions
Author(s) -
Turnbull L.,
Liggat J. J.,
MacDonald W. A.
Publication year - 2011
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.35476
Subject(s) - degradation (telecommunications) , ethylene , materials science , polyester , ageing , poly ethylene , nitrogen , polymer , polymer degradation , composite material , chemical engineering , polymer chemistry , accelerated aging , oxygen , chemistry , organic chemistry , catalysis , telecommunications , biology , computer science , engineering , genetics
PEN is thought to have increased thermal and hydrolytic resistance in comparison to PET. However, due to a lack of research, few studies have been published on the degradation of PEN. In our research, we report on the extent of degradation in PET and PEN after ageing under contrasting environments (dry nitrogen, dry air, wet nitrogen, and wet air) at temperatures between 140°C and 190°C. A combination of analysis techniques were employed in order to characterize and track the physical and chemical changes in the aged polyester samples, enabling the effects of temperature, water, and oxygen to be mapped onto the resultant property changes of PET and PEN. The extent of degradation has been shown to differ between both polymers and the dominant degradation mechanism in PET was shown to differ with ageing temperature. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011