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Physical Studies of A Series of Main-Chain Liquid Crystalline Polymers With Long Soft Segment

Published online by Cambridge University Press:  15 February 2011

Bing Wu ,
C. Peter Lillya  and
Richard S. Stein
Bing Wu
Affiliation:
University of Massachusetts, Chemistry Department, Amherst, MA 01003
C. Peter Lillya
Affiliation:
University of Massachusetts, Chemistry Department, Amherst, MA 01003
Richard S. Stein
Affiliation:
University of Massachusetts, Chemistry Department, Amherst, MA 01003
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Abstract

A series of Main-chain liquid crystalline polymers with long and polydisperse soft segments has been synthesized. The thermal properties of these polymers have been characterized by differential scanning calorimetry, optical microscopy and wide angle X-ray diffraction. Unexpectedly, these polymers have a strong tendency to form purely smectic Mesophases. The degree of ordering of these polymeric mesophases is Much higher than that of the mesophase formed by a low molecular weight Model compound with the same Mesogen. The soft segment length effects on thermal behavior of such segmented copolymers have been elucidated. A semi-quantitative theory has been formulated to interpret these observations. A phase diagram relating thermal properties to soft segment length has been proposed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 87
Copyright
Copyright © Materials Research Society 1994

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References

REFERENCE

[1] Noel, C. and Navard, P., Prog. Polym. Sci., 16, 55 (1991).Google Scholar
[2] Jedlinski, Z., Franee, J., Kulczycki, A., Sigiru, A. and Carfagna, C., Macromol., 22, 1600 (1989).Google Scholar
[3] Wu, P. P., Hsu, S. L., Thomas, O. and Blumstein, A., J. Polym Sci. Part B, Polym. Phys., 24, 827 (1986).Google Scholar
[4] Bilibin, A. Y. and Piraner, O. N., MakromoL Chem., 192, 201 (1991).Google Scholar
[5] Kolb, E. S., PhD Dissertation, University of Massachusetts, Ameherst, 1991.Google Scholar
[6] Percec, V. and Keller, A., Macromol., 23, 4347 (1990).Google Scholar
[7] Lillya, C. P., Wu, B., Kolb, E. S. and Stein, R. S., Macromol., will be submitted.Google Scholar