Results 181 to 190 of about 8,580 (232)

Bioremediation of polyvinyl chloride (PVC) films by marine bacteria

Marine Pollution Bulletin, 2021
Polyvinyl chloride (PVC) is the third one after polyethylene and polypropylene in the production demand. It intends to grow further, causing an increase in the risk of health and ecological problems due to environmental accumulation and incineration. In the present study, we determined the biodegradative abilities of marine bacteria for PVC.
Shrikant D, Khandare, Doongar R, Chaudhary, Bhavanath, Jha   +2 more
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A Rapid Test for Biodegradability of PVC Film by Pseudomonads

Journal of Applied Bacteriology, 1971
Summary. Biodegradability of plasticized PVC film by a Pseudomouas fluorescens strain was assessed quickly by determination of ammonia produced during endogenous respiration of the organism.
A N, Sharpe, M N, Woodrow
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Mechanical instability of swollen PVC films

Journal of Applied Polymer Science, 1995
AbstractThe swelling of soft coating on a tough substrate immersed in solvent is investigated. Equilibrium aspects of the coating deformation due to swelling as well as its kinetics have been explored; in particular, the appearance of patterns on the originally smooth surface of the swollen film is described and modeled.
O. Teschke, M. U. Kleinke, F. Galembeck
openaire   +1 more source

Properties of PVC. I. Properties of PVC films prepared by casting and by precipitation

Journal of Polymer Science Part A-1: Polymer Chemistry, 1969
AbstractThis investigation compares the properties of PVC films prepared both by casting from tetrahydrofuran solution and from samples obtained by precipitation with properties of samples from the original PVC. The differences in properties are explained on the basis of solvent residues remaining in the samples even after tempering at higher ...
Jiří Maláč, Eva Šimu̇nková, Jiří Zelinger   +2 more
openaire   +1 more source

Zur Morphologie dünner PVC‐Filme

Acta Polymerica, 1984
AbstractDie Morphologie dünner PVC‐Filme, die durch Spreitung verdünnter PVC‐Lösungen in Cyclohexanon auf einem Gemisch Wasser—Methanol als Fällugsmittel hergestellt werden, hängt entscheidend von der Methanolkonzentration im Fällungsmittel ab: Oberhalb 19 Vol.‐% Methanol bilden sich globuläre Strukturen zwischen 20 bis 200 nm, unterhalb 17 Vol ...
R. Lucklum, H. Behrens, E. Donth
openaire   +1 more source

Kinetics of growth of polyvinylchloride (PVC) films

Thin Solid Films, 1973
Polyvinylchloride (PVC) films have been grown by isothermal immersion of rocksalt, copper and glass substrates into dilute solutions of PVC in 80% benzene + 20% acetone (B+A) and cyclohexanone solvents. The dependence of the kinetics of growth of the films on the concentration and temperature of the solution and the nature of the solvent and substrate ...
A.C. Rastogi, K.L. Chopra
openaire   +1 more source

Diffusion of Butylated Hydroxy Toluol (BHT) in PVC Films

Spectroscopy Letters, 1989
Abstract The diffusion coefficient of butylated hydroxy toluol (BHT) in solvent casted PVC films from tetrahydrofurane (THF) was studied by UV spectroscopy. Diffusion coefficient of BHT in PVC at 140, 160 and 180°C were determined as 1.0 × 10−12 3.0 × 10−12 and 6.0 × 10−12 m2/s. The activation energy of diffusion (Ea) was 66 kj/mol.
openaire   +2 more sources

Electron Transport Properties of Cu-Doped PVC Films

Physica Status Solidi (a), 1979
DC conductivity, ac conductivity, dielectric relaxation, and thermally stimulated discharge (TSD) current measurements are made on Cu-doped PVC films as a function of Cu concentration up to 12%. The dc conductivity of doped films increases by several orders up to a concentration of 4% and thereafter changes little for higher concentrations.
T. V. Rao, K. L. Chopra
openaire   +1 more source

Pyrotechnic Films Based on Thermites Covered with PVC

Propellants, Explosives, Pyrotechnics, 2018
AbstractIncorporation of pyrotechnics into a polymer film of approximately 0.5 mm thick can be used to conveniently prepare pyrotechnics for characterization and demonstration purposes as shown with various thermites. Pyrotechnics may be prepared from fuels and oxidants as sieve mixed powders or dispersed into liquids and mixed together.
Kenneth J. Smit, Michael Morgan, Raoul Pietrobon   +2 more
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Surface enrichment in thin films of PVC and PMMA

Acta Polymerica, 1996
AbstractThe surface enrichment in thin bilayer films of poly(vinyl chloride) (PVC) and deuterated poly(methyl methacrylate) (PMMAd) was studied by neutron reflectometry, X‐ray photoelectron spectroscopy (XPS) and static secondary ion mass spectrometry (SSIMS).
Kunze, K., Stamm, M., Hartshorne, M., Affrossman, S.   +3 more
openaire   +2 more sources