Morphology of a hydrogen-bonded LC polymer prepared by photopolymerization-induced phase separation under an isotropic phase

摘要: Abstract A hydrogen-bonded LC polymer was prepared by photopolymerization of an blend composed 4-(6-acryloyloxyhexyloxy)benzoic acid (A6OBA) and 4-hexyloxy-4′-cyanobiphenyl (6OCB), containing small amounts inhibitor photoinitiator, at two different temperatures in isotropic phase. To elucidate the factors determining morphology obtained (poly(A6OBA)), we chose irradiation temperatures: one temperature range polymer, other range. We investigated structures polymers optical microscopy scanning electron microscopy. SEM images showed that film lower consisted randomly extended fibers having a diameter ca. 1.0 μm some branches, whereas higher particles with 1.5 μm. By comparing these results those earlier experiment which macroscopically oriented under phase blend, infer following; (i) presence resulting itself during is necessary for it to form fibrous (ii) ordering field present prior not indispensable but macroscopic orientation reduction branches fibers.