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The decomposition kinetics of polyester microfiber fabrics by sodium glycerolate/glycerol solution
Author(s) -
Huh ManWoo,
Yoon JongHo
Publication year - 1997
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/(sici)1097-4628(19970509)64:6<1217::aid-app23>3.0.co;2-r
Subject(s) - activation energy , arrhenius equation , sodium hydroxide , microfiber , hydrolysis , fiber , polyester , kinetics , materials science , decomposition , aqueous solution , scanning electron microscope , sodium , polymer chemistry , chemical engineering , chemical decomposition , chemistry , composite material , organic chemistry , physics , quantum mechanics , engineering
Polyester microfiber fabrics were alcoholyzed at 120, 140, and 160°C in 0.5, 1.0, and 1.5% (w/w) sodium glycerolate/glycerol solutions (NaGR) and the decomposition kinetics was studied in comparison to the hydrolysis done by a 5% aqueous sodium hydroxide solution (NaOH) at temperatures 80, 90, and 100°C. The activation energy and the Arrhenius pre‐exponential factor of the alcoholysis found from this study were 30.57 kcal/mol and 2.04 × 10 14 / M s −1 , respectively. In comparison to the hydrolysis case, these values are much higher. The activation energy and the preexponential factor of the hydrolysis found from this study were 14.48 kcal/mol and 1.947 × 10 6 / M s −1 , respectively. The resulting surface morphologies observed by a scanning electron microscope showed that the NaGR‐decomposed PET fiber surfaces were distinguished from the NaOH‐decomposed PET fiber surfaces by a uniformly developed fine structure of microcraters. It is believed that such a fine microcrater structure of the NaGR‐decomposed fiber surface is due to the greater pre‐exponential factor as well as to the higher activation energy of the alcoholysis. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1217–1223, 1997