Morphology

1
Morphology
2
Microstructure in Polymers

• Polymer Morphology
• Amorphous
• Crystalline
• Liquid Crystal Polymers

3
Crystalline

• High crystallinity causes cloudiness
• High crystalline materials have sharp melting
  point
• High crystallinity causes high shrinkage
• High crystalline polymers have higher service
  temperature
• Materials nylon, polypropylene, acetal,
  polyethylene

4
Amorphous

• Good clarity
• Melting point is not sharp
• Less shrinkage
• Easier to process
• Materials polystyrene, acrylic, PVC,
  cellulosic

5
Microstructure in Polymers
Amorphous
Crystalline (semi- Crystalline)
Liquid Crystal Polymer (LCP)
6
Microstructure and Its Effect on
Density Shrinkage Warpage Dimensional
stability Mold flow Chemical resistance Bonding
to reinforcements Toughness Creep
resistance Optical clarity Wear resistance
7
Structural Hierarchy
8
(No Transcript)
9
(No Transcript)