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Crystalline polymers - polymers with a regular, linear structure of the chain or containing groups of high polarity, evenly spaced along the macromolecule. They arise as a result of thermal movements and intermolecular forces of intermolecular chains.

There are two types of models.

The crystalline polymers may have lamellar, slatted, fibrous, dendrite, shish-kebab crystals.

The crystalline polymers contain regions with ordered macromolecules and amorphous, amorphous (subcooled) areas: in accordance with the thermodynamics principle, they have a two-phase structure. The crystalline polymers in which the crystalline phase is small should be called semicrystalline polymers.

Application of crystalline polymers: thermal insulation, vapor barriers, PP cut fibers, heat insulating films, anti-moisture insulations.

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