Poly(oxyethylene)s containing n -octylthiomethyl side groups were synthesized by the reaction of poly[oxy(chloromethyl)ethylene] (CE) and sodium n -octanethiolate in DMAc. These were oxidized to poly(oxyethylene)s containing n -octylsulfonylmethyl side groups. When the mole percentage of sulfur containing monomeric units in the copolymers was about 60% or more, ordered phases formed. Structural analysis of the ordered phase of poly(oxyethylene)s containing n -octylthiomethyl side groups is in progress. The ordered phase of poly(oxyethylene)s containing n -octylsulfonylmethyl side groups was studied using differential scanning calorimetry, cross-polarizing optical microscopy, and X-ray diffraction. It was found to be a smectic A liquid crystalline phase.
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Lee et al. (1998) studied this question.