STRUCTURE AND PHASE-TRANSITIONS IN COMPLE XES OF POLY(ACRYLIC ACID) WITH SALTS OF BETA-N-DIMETHYLAMINO-4-ALKYLPROPIOPHENONES AND ALKYLOXYPROPIOPHENONES

Structure and phase transitions in H-bonded complexes of poly(acrylic acid) with salts of beta-N-dimethylamino-4-alkyloxypropiophenones were studied by LR spectroscopy, X-ray diffraction, calorimetry, and optic al microscopy: Specific binding between polyacid and salts of beta-N-d imethylamino-4-alkyl- and alkyloxypropiophenones leads to the formatio n of thermotropic LC phase. The structure of LC phase can be regarded as a smectic (lamellar) phase characterized by the layer order of side chains with complete overlapping of alkyl ''tails'' and a confocal te xture.