Side-Chain Liquid-Crystal Polymers:  Gel-like Behavior below Their Gelation Points

We present microrheology experiments on a series of polysiloxane-type liquid-crystal polymers with mesogen-graft amounts of 25%, 70% and 100%. The experiments, conducted as a function of sample thickness, show that the low-frequency response of all of these polymers shifts progressively from a liqui...

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Bibliographic Details
Published in:Macromolecules 1999-03, Vol.32 (6), p.1746-1752
Main Authors: Martinoty, P, Hilliou, L, Mauzac, M, Benguigui, L, Collin, D
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Inorganic and organomineral polymers
Physicochemistry of polymers
Properties and characterization
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Summary:We present microrheology experiments on a series of polysiloxane-type liquid-crystal polymers with mesogen-graft amounts of 25%, 70% and 100%. The experiments, conducted as a function of sample thickness, show that the low-frequency response of all of these polymers shifts progressively from a liquid-type behavior for thick samples (>100 μm) to a purely elastic behavior for thin samples (
ISSN:0024-9297
1520-5835
DOI:10.1021/ma981291n