NDLI: Crystallization and molecular relaxation of poly(ethylene terephthalate) annealed in supercritical carbon dioxide

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Crystallization and molecular relaxation of poly(ethylene terephthalate) annealed in supercritical carbon dioxide

Content Provider	Springer Nature Link
Author	Jung, Yong Chae Cho, Jae Whan
Copyright Year	2005
Abstract	Poly(ethylene terephthalate) was annealed at different temperature and pressure of supercritical carbon dioxide (CO$_{2}$) using samples quenched from the melt. Crystallization and molecular relaxation behavior due to CO$_{2}$-annealing of samples were investigated using differential scanning calorimetric and dynamic mechanical measurements. The glass transition and crystallization temperatures significantly decreased with increasing temperature and pressure of CO$_{2}$. The dynamic mechanical measurement of samples annealed at 150 °C in supercritical CO$_{2}$ showed three relaxation peaks, corresponding to existence of different amorphous regimes such as rigid, intermediate, and mobile domains. As a result, the mobile chains were likely to facilitate crystallization in supercritical state. It also led to the decreased modulus of CO$_{2}$-annealed samples with increasing pressure.
Starting Page	284
Ending Page	288
Page Count	5
File Format	PDF
ISSN	12299197
Journal	Fibers and Polymers
Volume Number	6
Issue Number	4
e-ISSN	18750052
Language	English
Publisher	The Korean Fiber Society
Publisher Date	2005-01-01
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polyester Crystallization Supercritical carbon dioxide Dynamic mechanical properties Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Polymers and Plastics

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