TY - JOUR
T1 - Nematic smectic-C phase transition in the polymeric liquid crystal C-6 polysiloxane
T2 - A high resolution x-ray study
AU - Nachaliel, Ehud
AU - Keller, Edward N.
AU - Davidov, Dan
AU - Zimmermann, Herbert
AU - Deutsch, Moshe
PY - 1987
Y1 - 1987
N2 - We report on the first x-ray scattering measurements of pretransitional smectic-C fluctuations in the nematic phase of a side-chain polymeric liquid crystal, C-6 polysiloxane. The data are well described by the mean-field theory of Chen and Lubensky suggesting that the mesogenic side groups are only weakly coupled to the polymeric backbone. Because of disorder in the polymer backbone, the correlation lengths, in the vicinity of the nematic-smectic-C phase transition, are weak functions of temperature and their magnitudes are smaller than those of conventional monomeric liquid crystals.
AB - We report on the first x-ray scattering measurements of pretransitional smectic-C fluctuations in the nematic phase of a side-chain polymeric liquid crystal, C-6 polysiloxane. The data are well described by the mean-field theory of Chen and Lubensky suggesting that the mesogenic side groups are only weakly coupled to the polymeric backbone. Because of disorder in the polymer backbone, the correlation lengths, in the vicinity of the nematic-smectic-C phase transition, are weak functions of temperature and their magnitudes are smaller than those of conventional monomeric liquid crystals.
UR - http://www.scopus.com/inward/record.url?scp=4243245767&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.58.896
DO - 10.1103/PhysRevLett.58.896
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AN - SCOPUS:4243245767
SN - 0031-9007
VL - 58
SP - 896
EP - 899
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
ER -