Authors:
H. Yoshida Tokyo Metropolitan University Graduate School of Engineering Hachiohji Tokyo 192-0397 Japan Hachiohji Tokyo 192-0397 Japan

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M. Yang Tokyo Metropolitan University Graduate School of Engineering Hachiohji Tokyo 192-0397 Japan Hachiohji Tokyo 192-0397 Japan

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K. Masaka Kanagawa University Department of Applied Chemistry Kanagawa-ku Yokohama 221-8686 Japan Kanagawa-ku Yokohama 221-8686 Japan

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Y. Houshito Kanagawa University Department of Applied Chemistry Kanagawa-ku Yokohama 221-8686 Japan Kanagawa-ku Yokohama 221-8686 Japan

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K. Mashiko Kanagawa University Department of Applied Chemistry Kanagawa-ku Yokohama 221-8686 Japan Kanagawa-ku Yokohama 221-8686 Japan

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S. Nakamura Kanagawa University Faculty of Engineering Yokohama 221-8686 Japan Yokohama 221-8686 Japan

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Abstract  

Phase transition behavior of polyesters derived from 2,7-phenanthrene dicarbonic acid diethylester and alkanediols with even methylene carbon number was investigated by the simultaneous DSC-XRD method. The smectic A phase was observed on cooling from the molten state. The transition entropy from the isotropic state to the smectic A phase was about 9.0 J mol-1 K-1, which depended on the methylene carbon number. The linear expansion coefficients, based on the (001) spacing of the crystalline phase at room temperature, were 1.310-4 K-1 (crystalline phase), 5.710-4 K-1 (crystallization region), 1.710-3 K-1 (smectic A phase) during cooling, and 1.510-4 K-1 (crystalline phase), and 1.010-3K-1(melting region) on heating.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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