Molecular diffusion in ternary poly(vinyl alcohol) solutions

Ultrasonic Study of Molecular Association of Ternary Mixtures in Polyvinyl Alcohol, Stearates and Ethylene Glycol

Ultrasonic velocity measurements are reported for aqueous solutions of polyvinyl alcohol with different stearates such as zinc stearate and calcium stearate with plasticizer ethylene glycol at 303 K. The data obtained as a function of concentration indicate the magnitude of the contributions due to the relaxation of the backbone and of the side – chain acetyl group. A variety of the different t...

Surface Adsorption of Polyethylene Glycol and Polyvinyl Alcohol with Variable Molecular Weights on Zinc Oxide Nanoparticles

Measurements of molecular and thermal diffusion coefficients in ternary mixtures.

Thermal diffusion coefficients in three ternary mixtures are measured in a thermogravitational column. One of the mixtures consists of one normal alkane and two aromatics (dodecane-isobutylbenzene-tetrahydronaphthalene), and the other two consist of two normal alkanes and one aromatic (octane-decane-1-methylnaphthalene). This is the first report of measured thermal diffusion coefficients (for a...

Polyvinyl alcohol particle superficial morphology.

We appreciated the research by Derdeyn et al (1) from the Mallinckrodt Institute of Radiology concerning the size and suspension characteristics of polyvinyl alcohol (PVA) particles. We do agree that both size and suspension characteristics of PVA represent relevant parameters affecting the aggregation of particles during injection. In addition to these two variables, we considered further para...

OPH oxidized polyvinyl alcohol hydrolase PCL polylcaprolactone PHA polyhydroxyalkanoate PHB polyhydroxybutyrate PLA polylactic acid PQQ pyrroloquinoline quinone PUR polyurethane PVA polyvinyl alcohol PVADH polyvinyl alcohol dehydrogenase

Widespread studies on the biodegradation of plastics have been carried out in order to overcome the environmental problems associated with synthetic plastic waste. Recent work has included studies of the distribution of synthetic polymerdegrading microorganisms in the environment, the isolation of new microorganisms for biodegradation, the discovery of new degradation enzymes, and the cloning o...