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The structures displayed by poly{10-[(4-cyano-4'-biphenyl)oxy]decanyl vinyl ether} were studied by small- and wide-angle X-ray scattering. It is shown that this polymer possesses two different smectic phases : an ordered smectic E phase at low temperatures, and a smectic A phase at higher temperatures. The smectic A phase is characterized by a double-layer packing with partial overlap of the cyanobiphenyl groups, while the ordered smectic E phase displays a layer packing characterized by the presence of two incommensurate periodicities. The structural rearrangements accompanying the phase transformation from the ordered to the disordered smectic phase are discussed in detail.

Посилання на статтю:

Structural rearrangements during mesomorphic phase transitions in poly { 1 O- [ (cyano-4'- biphenyl ) oxy ] decanyl vinyl ether} / V. Tsukruk and J. H. Wendorff and Virgil Percec* and Myongsoo Lee // Polymer. – 1993. – Vol 34. – P. 481-486.

Structural rearrangements during mesomorphic phase transitions in poly { 1 O- [ (cyano-4'- biphenyl ) oxy ] decanyl vinyl ether} - Завантажити.