Birds do it, Bees do it, - PowerPoint PPT Presentation

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Birds do it, Bees do it,

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SMECTIC C LIQUID CRYSTAL. Molecules Tilted in Diffuse Layers. No Long Range Positional Order ... SMECTIC A LIQUID CRYSTAL. Molecules Orthogonal to the Diffuse. Layers ... – PowerPoint PPT presentation

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Title: Birds do it, Bees do it,


1
Birds do it, Bees do it,
Can Liquid Crystals / Polymers do it?
2
Liquid Crystals
Lyotropic
Thermotropic
Low Molar Mass Materials
High Molar Mass Materials
Main-chain Polymers
Side-chain Polymers
Calamitic
Discotic
3
ISOTROPIC LIQUID ZERO order NONE
SOLID 3D POSITION ORIENTATION
MESOPHASE 1 or 2D ORIENTATION POSITION
4
NEMATIC 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
5
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6
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7
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8
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9
MG
A
B
B A
B
A
MG
MG
Main Chain Liquid Crystalline Polymers
MG
B
Side Chain Liquid Crystalline Polymers
10
Polymer Backbone
Spacer Group
Mesogenic Side-chain
11
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12
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13
ENGINEERING
PHYSICS
14
(No Transcript)
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