Can Liquid Crystals / Polymers

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Presentation transcript:

Can Liquid Crystals / Polymers Birds do it, Bees do it, Can Liquid Crystals / Polymers do it?

Liquid Crystals Lyotropic Thermotropic Low Molar Mass Materials High Molar Mass Materials Main-chain Polymers Side-chain Polymers Calamitic Discotic

ISOTROPIC LIQUID ZERO order NONE SOLID 3D POSITION ORIENTATION MESOPHASE 1 or 2D ORIENTATION POSITION

q NEMATIC LIQUID CRYSTAL SMECTIC C LIQUID CRYSTAL Long Range Orientational Order No Positional Order SMECTIC C LIQUID CRYSTAL Molecules Tilted in Diffuse Layers No Long Range Positional Order Long Range Tilt Order q SMECTIC A LIQUID CRYSTAL Molecules Orthogonal to the Diffuse Layers No Long Range Positional Order

Liquid Crystals Thermotropic Lyotropic High Molar Mass Low Molar Mass Materials Side-chain Polymers Calamitic Discotic Main-chain

Main Chain Liquid Crystalline Polymers MG B A MG B A MG B Main Chain Liquid Crystalline Polymers MG B Side Chain Liquid Crystalline Polymers

Polymer Backbone Spacer Group Mesogenic Side-chain

CHEMISTRY LIQUID CRYSTAL DEVICES ENGINEERING PHYSICS