Prefreezing effects in the viscosity and other properties of liquids

Imperial College, Londres, G.-B..

Abstract

Theory indicates that co-opperative or "lixenked hexophase" fuctuations are likely to be found on ether site off flower, experimentely, precenting and pre-freezing "anomalies" only become prominent in a limited umber of cases, where conditione for co-coperative fuctuations are particulary favo rable. The range of possibilites appears to be conside- rably greater above than below the frezing point.

Some of the more maked pre-frezing anomalies in liquids are received. In principe, various physical properties of mets can show such anomalies. As a working model, such mets are negarded as a conglomerate of quasi-gasens negions of molecular padling, mixed withe molecules packed in to dusbers of about the same or even higher density to give more sensitive information about the formaton of co-operative "dustes" than is likely to emerge from thermodynamic properties such" as the specific that corspecific volume. Whe never the redaxation time for the formation or breakdown of a duster in a conglo-merate met can have quite diverse origins. They need not be very large to afect transport properties of the fluid proviced breakdown and formation of dustes is aprociably slower than other micro-relaxation proceses in the fluid. Ouster formation in liduids leading to viscosity anomalies can be regarded as the precusor to consomation of a met in to a gas, on coming a suficently low temperature, instead of trasmorming in to a crystaline solid.