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Spectrophotometric determination of water vapor permeation through polymer films
Author(s) -
Holland R. V.,
Santangelo R. A.
Publication year - 1982
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1982.070270525
Subject(s) - water vapor , permeation , anhydrous , gravimetric analysis , materials science , polymer , humidity , cobalt , bottle , polyvinyl chloride , chloride , cobalt chloride , chemical engineering , analytical chemistry (journal) , polymer chemistry , chromatography , chemistry , composite material , membrane , organic chemistry , biochemistry , physics , engineering , metallurgy , thermodynamics
A novel method for measuring the permeation of water vapor through polymer films is described. A cellulose detector film incorporating cobalt chloride in a blue anhydrous from is sealed between two pieces of test film in a specially designed cell. The cell is placed in a controlled temperature and humidity cabinet, and the disappearance of the blue color of the cobalt chloride is recorded spectrophotometrically as water vapor diffuses through the test film into the detector film. This simple method of determining water‐vapor‐transmission rates is more rapid than standard gravimetric procedures because of the highly sensitive detection technique.