Abstract
AbstractSingle crystals, suitable for electron microscopy and diffraction, have been grown from the quiescent and sheared “liquid crystal” state and solution for several random terpolymer polyesters having a nearly equimolar amount of a flexible segment dicarboxylate (4–7 CH2), oxybenzoate and dioxyphenyl. In all cases, in thin films and on free surfaces, folded chain lamellae are observed. High temperature electron diffraction has permitted characterization of the transition behavior and structure of the liquid crystal state. Permanganate etching permitted characterization of the interior of molded, extruded or spun samples; in these cases extended chain lamellae are observed. The results suggest chain folding in the nematic state at least in the thin films and on surfaces, with chain folding also possible in the bulk followed by chain extension by “sliding” diffusion.
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