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A range of cyclic poly(oxyethylene)s, (OCH 2 CH 2 ) m , with m in the range 23-68, corresponding to rings of 69-204 chain atoms, have been prepared by a modified tosylation method that gave c. 75 wt% yields. Gel permeation chromatography and nuclear magnetic resonance were used to monitor the cyclization and purification procedures. Small-angle X-ray studies provided a useful...
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