Types of solid state structure of macro-molecules:
Thus in general the solid state structures of macro-molecules are of 3 types-
1. Type-A:
- Mainly amorphous.
- Randomly coiled structure with little or no crystallinity.
- No special conformation.
- Structure mainly determined by steric consideration.
- Example: PVC, Poly-methyl-methacrylates.
2. Type-B:
- Fairly definite structure & crystallinity.
- Conformation being determined by steric or by a strong tendency.
- Example: Fibrous protein, Isotactic-synthetic polymers.
3. Type-C:
- Compact
- Definite structure with great complexity.
- Conformations being determined mainly by the coiling followed by the folding of the macro-molecules.
- Example: The globular proteins.