AbstractCrystalline particles of cyclic oligomers are formed on the surface of poly(ethylene terephthalate) (PET) films during heat treatment or exposure to solvent vapor. The formation of crystals of oligomers due to heat treatment can be prevented by depositing onto the PET films morphologically continuous coatings of various elements. The critical thickness of the coating which effectively stops nucleation of these crystals depends on the element deposited under given experimental conditions. In the case of solvent (methylene chloride) exposure, the most important factor preventing oligomer crystallization was the chemical nature of the element used as a coating.
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