• Bulletin of the Korean Chemical Society
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• v.11 no.4
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• pp.333-339
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• 1990

A series of new dimesogenic compounds whose mesogens are of aromatic ester or amide type having a trifluoromethyl $(CF_3)$ substituent at the para-position of each terminal phenolic rings were prepared and their liquid crystalline properties were studied by differential scanning calorimetry (DSC) and on a cross-polarizing microscope. The compounds have two identical mesogenic units bracketing a central decamethylene spacer. Trifluoromethyl group appears to favor the formation of smectic phases when it is attached to a phenoxy or anilide terminal. Its group efficiency for mesophase formation seems to be inferior to other common substituents. A thermodynamic analysis of the phase transitions was made and the results were explained in relation to the structures of the compounds.

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.98-101
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• 1998

Segmented polyurethane elastomers are an important class of polymeric materials consisting of thermodynamically incompatible hard and soft segments. Due to the chemical structural difference between the hard and soft segments, a microphase separation occurs, consisting of crystalline hard domains and amorphous soft domains. (omitted)

• Bulletin of the Korean Chemical Society
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• v.18 no.10
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• pp.1067-1070
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• 1997

The synthesis and characterization of the nitrile ligands 3,4,5-tridodecyloxy benzonitrile (7) and 3,4,5-trioctadecyloxy benzonitrile (8), and their corresponding palladium(Ⅱ) complexes are described. The nitrile ligands display only a crystalline phase and do not show liquid crystalline behavior, while their corresponding palladium(Ⅱ) complexes dispaly an enantiotropic columnar mesophase. The induction of the columnar mesophase is mainly due to dimerization through the palladium complexation of the half disk-like nitrile ligands giving rise to a trans square planar geometry.

• Proceedings of the Korean Society of Rheology Conference
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• 2003.05a
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• pp.99-102
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• 2003

No Abstract, See Full Text

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 1999.11a
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• pp.99-102
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• 1999

• Proceedings of the Korean Fiber Society Conference
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• 1990.06a
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• pp.13-13
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• 1990

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.514-514
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• 2002

• Proceedings of the Korean Fiber Society Conference
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• 1994.10a
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• pp.119-119
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• 1994

• Proceedings of the Korean Fiber Society Conference
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• 1993.06b
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• pp.578-582
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• 1993

• Polymer Science and Technology
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• v.25 no.3
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• pp.201-204
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• 2014