STRUCTURE-SENSITIVE LIQUID-FLOWING MEDIA BASED ON POLYVINYL-ALCOHOL COMPOUNDS WITH CELLULOSE ESTERS

The class of structure-sensitive liquid-flowing media based on polyvin yl alcohol (PVA) compounds with water-soluble cellulose esters (carbox ymethylcellulose, Na-CMC, methylcellulose, MC) have been investigated. PVA may be used as an excellent structure-sensitive matrix for films and gels. Introduction of active additives allows for the formation of liquids whose structures changes under the action of external fields. Introduction of additives, especially of Na-CMC and MC into PVA in th e range of certain concentrations leads to the formation of the comple xes of PVA with the active molecules linked by hydrogen bonds. Besides , due to the formation of macromolecular associates, a definitely orde red structure of the solution develops. Such changes in the structure of a solution result in abnormal properties, viz. rheological (charact eristic flow curves), electrophysical and optical properties in the ra nge of certain concentrations and temperatures. These fluids may be re commended for the formation of electric field-controlled anisotropic f ilms and fibers as well as sensors and measuring elements sensitive to external fields.