Determination of permeability and diffusivity of oxygen in polymers by polarographic method with inert gas

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F05%3A00013216" target="_blank" >RIV/61989100:27360/05:00013216 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Determination of permeability and diffusivity of oxygen in polymers by polarographic method with inert gas

Original language description

A modified polarographic method with inert gas for determination of the oxygen permeability in polymers immersed in liquids is described. Owing to the stream of an inert gas towards polymer from the cathode side, lateral oxygen diffusion (edge effects) is minimized. Unlike the standard Fatt method, the method with inert gas is suitable also for thick samples and therefore for high-permeable materials. The method was tested for prediction of oxygen permeability in poly(1-vinyl 2-pyrrolidone) (PVP) and poly(2-hydroxyethyl methacrylate) (PHEMA). As an electrolyte, solution of potassium chloride was used. The effect of additional resistances and small lateral diffusion was taken into account. Unexpectedly, oxygen permeability in both polymers was greater for 0.1M KCl than for 0.5M KCl. The experimental setup was also used for diffusivity estimation in thick samples of PHEMA and PVP. Here, the oxygen flux response at one sample surface to the stepwise change in oxygen concentration at the o

Czech name

Stanovení permeability a difuzivity kyslíku v polymerecg polarografickou metodou s inertním plynem

Czech description

Byla navržena modifikovaná metoda stanovení propustnosti kyslíku vrstvou polymeru. Metoda je vhodná pro práci se silnějšími vzorky. Ve stejném uspořádání se také dá měřit difuzní koeficient a stanovit rozpustnost kyslíku v polymerech.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

<a href="/en/project/GA106%2F00%2F1296" target="_blank" >GA106/00/1296: Hydrogel contact lenses with enhanced oxygen permeability</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2005

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Polymer

ISSN

0032-3861

e-ISSN

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Volume of the periodical

46

Issue of the periodical within the volume

23

Country of publishing house

BE - BELGIUM

Number of pages

13

Pages from-to

9974-9986

UT code for WoS article

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EID of the result in the Scopus database

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