Premium
Effect of dissolved carbon dioxide on the glass transition and crystallization of poly(lactic acid) as probed by ultrasonic measurements
Author(s) -
Reignier J.,
Tatibouët J.,
Gendron R.
Publication year - 2009
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.27896
Subject(s) - crystallization , materials science , carbon dioxide , kinetics , glass transition , chemical engineering , ultrasonic sensor , lactic acid , polymer chemistry , analytical chemistry (journal) , composite material , chemistry , organic chemistry , polymer , physics , quantum mechanics , biology , bacteria , acoustics , engineering , genetics
The effects of dissolved carbon dioxide (CO 2 ) molecules on the glass‐transition temperature as well as the crystallization kinetics of poly(lactic acid) have been investigated with a novel device that combines ultrasonic and volumetric measurements. Ultrasonic parameters such as the sound velocity are very sensitive to crystallization and can be used to monitor the crystallization kinetics. The glass‐transition temperature has been found to decrease nonlinearly as the CO 2 concentration increases. The maximum in the crystallization rate has been found to increase with the addition of CO 2 . © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009