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· Crystals may be grown from these macromolecules, normally
from dilute solutions of the polymer.
· Mixed bonding occurs
in a crystalline polymer: covalent bonding in chain, hydrogen bonding between
chains.
· The diagram shows how chain sections come
together to form a crystalline structure. The segments shown may be from the
same folded macromolecule or different molecules. The dimensions shown are
for the smallest unit of the crystal, the orthorhombic
unit cell with dimensions:
(0.255 x 0.494 x 0.741 nm).
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