Mallika Dhar

Broschiertes Buch

Liquid Crystal and Its Quasi-Equilibrium Phase Separation

Studies of Thermally Induced Phase Separation of Liquid Crystals and Pre-polymer Mixtures

Beschreibung

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.

Autor

Mallika Dhar, currently doing Ph.D. at the University of Southern Mississippi, MS, USA. I did Master of Science in Physics from the same institution. My Bachelor of Science was done in Calcutta, India. Between Bachelor and Master''s work, I did Post Graduate Diploma in Astronomy and Planetarium Science in Calcutta, India.

Produktdetails

• Verlag: LAP Lambert Academic Publishing
• Seitenzahl: 64
• Erscheinungstermin: 26. Mai 2010
• Englisch
• Abmessung: 220mm x 150mm x 4mm
• Gewicht: 113g
• ISBN-13: 9783838350158
• ISBN-10: 3838350154
• Artikelnr.: 29970184