X-ray diffraction study of ‘side-on fixed’ homopolysiloxanes from nematic to smectic C phases
作者:
M.F. Achard,
S. Lecommandoux,
F. Hardouin,
期刊:
Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 19,
issue 5
页码: 581-587
ISSN:0267-8292
年代: 1995
DOI:10.1080/02678299508031071
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The X-ray patterns for the nematic phase in a series of side-on fixed polysiloxanes show different kinds of diffuse elements which imply complex short range ordering. A systematic structural study of the evolution of the patterns versus two molecular parameters, namely the spacer length and the length of the terminal aliphatic tails, suggests the possible occurrence of a smectic C phase for certain values of these parameters. Taking into account these tendencies, new synthesis led to a nematic-smectic C polymorphism observed for the first time in side-on fixed polysiloxanes.
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