Accession Number:
AD0671527
Title:
ON THE USE OF PHOSPHORESCENCE QUENCHING FOR DETERMINING PERMEABILITIES OF POLYMERIC FILMS TO GASES,
Descriptive Note:
Corporate Author:
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Personal Author(s):
Report Date:
1968-05-01
Pagination or Media Count:
16.0
Abstract:
By measuring the lifetime of the phosphorescence of an additive in a polymeric film as a function of the ambient pressure of a quenching gas, it is possible to calculate the permeability of the polymer to the quenching gas. The mathematical analysis is based upon the well-known steady-state diffusional quenching theory. From the oxygen quenching of the phosphorescence of naphthalene additive, a permeability of polymethylmethacrylate to oxygen of 1.1 plus or minus 0.2 x 0.0001 sq.cm.sec.mole1mm was calculated. Author
Descriptors:
Subject Categories:
- Plastics
- Test Facilities, Equipment and Methods