Investigation by X-ray diffraction of phase transitions of the mesomorphic polymer poly( p-biphenylyl acrylate)

An Investigation was performed on the glassy state — smectic A and on the smectic A — Isotropie l i quid transitions of the mesomorphic polymer poly(p-biphenylyl acrylate) by x-ray diffraction. An hysteresis effect and strong pretransitional effects were observed in the integrated x-ray diffracted i...

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Bibliographic Details
Published in:Materials letters 1983, Vol.2 (2), p.176-178
Main Authors: Mariani, Paolo, Rustichelli, Franco, Melone, Savino, Torquati, Giuseppe, Lupinacci, Domenico
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
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Summary:An Investigation was performed on the glassy state — smectic A and on the smectic A — Isotropie l i quid transitions of the mesomorphic polymer poly(p-biphenylyl acrylate) by x-ray diffraction. An hysteresis effect and strong pretransitional effects were observed in the integrated x-ray diffracted intensity. Moreover an abrupt change of the lateral distance between the biphenylyl groups was observed in a narrow temperature range at the melting. This fact was attributed to a change in the organization of the long rigid side groups around the main chain.
ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(83)90064-2