Effect of dissolved carbon dioxide on the glass transition and crystallization of poly(lactic acid) as probed by ultrasonic measurements

Wiley - Tập 112 Số 3 - Trang 1345-1355 - 2009
Joël Reignier1, J. Tatibouët1, Richard Gendron1
1Industrial Materials Institute, National Research Council Canada, 75 de Mortagne Boulevard, Boucherville, Quebec, Canada J4B 6Y4

Tóm tắt

AbstractThe effects of dissolved carbon dioxide (CO2) 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 CO2 concentration increases. The maximum in the crystallization rate has been found to increase with the addition of CO2. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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Wiley

Tập 112 Số 3

1345-1355

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