Liquid Crystal and Its Quasi-Equilibrium Phase Separation : Studies of Thermally Induced Phase Separation of Liquid Crystals and Pre-polymer Mixtures

Language: English

Published by LAP LAMBERT Academic Publishing, 2010

3838350154 / 9783838350158

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nach der Bestellung gedruckt Neuware - Printed after ordering - Thermally induced phase separation of liquid crystal and pre-polymer mixtures were studied using liquid crystal K15 and K21, two of the four components of commercially available liquid crystal E7 and a thiol-ene pre-polymer, UV1. The main purpose of this study was to construct quasi-equilibrium phase diagrams of K15/UV1 and K21/UV1. Phase separation of liquid crystal/pre-polymer system was observed using polarized optical microscopy. Liquid crystal/Pre-polymer mixtures (K15/UV1 and K21/UV1 mixtures) were prepared with increasing percentage of liquid crystal in pre-polymer. Each sample was then subjected to quasi-equilibrium thermal cycles. Phase separation was detected by the onset of the formation of liquid crystal droplets in the homogeneous mixture. A quasi-equilibrium phase diagram of K15/UV1 was constructed by plotting quasi-equilibrium phase separation temperature with respect to K15 percentage in UV1 pre-polymer. For K21/UV1 mixtures, quasi-equilibrium thermal cycles resulted in crystallization. We decided to run slow-rate thermal cycles instead of quasi-equilibrium thermal cycles. Phase diagram of K21/UV1 was constructed using the slow-rate thermal cycle data. …

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Title
Liquid Crystal and Its Quasi-Equilibrium Phase Separation : Studies of Thermally Induced Phase Separation of Liquid Crystals and Pre-polymer Mixtures
Author
Mallika Dhar
Publisher
LAP LAMBERT Academic Publishing
Publication year
2010
Condition
Neu
Binding
Taschenbuch
Language
English
ISBN 10
3838350154
ISBN 13
9783838350158
Item weight
113 grams
Dimensions
220x150x4 mm

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