Solution Crystallization of Poly-3,3-Bis(Chloromethyl)-Oxacyclobutane

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Abstract
Poly‐3,3‐bis(chloromethyl)‐oxacyclobutane crystallizes isothermally from dilute solution in the form of lamellar single crystals, whose shape and thickness depend on the crystallization temperature, along with a globular material of distinctly different morphology. The variation in crystal shape with crystallization temperature is suggested to arise from the presence of two different types of folds in a given fold domain, the relative number depending on the temperature. The globular material is believed to arise from a phase separation occurring during rapid quenching of the hot polymer solution to the crystallization temperature, the polymer‐rich phase crystallizing as globules and the polymer‐poor phase as single crystals.