Abnormal Densities Obtained by Liquid Crystallization of Thin Poly(Ethylene Terephthalate) Films
1978
Lawton, E.L. | Cates, D.M.
Whén poly(ethylene terephthalate) films arc crystallized by certain liquids, thin films exhibit abnormally low densities, in contrast to thick films which have the densities of semicrystalline polymer. Cavitation produced by the crystallizing liquid is considered responsible. Although thick films also undergo cavitation, any lasting effect is confined to the surface; the influence on density is not detected because the cavitated structure represents a relatively small fraction of the total film.
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