Accession Number : AD0671527

Title :   ON THE USE OF PHOSPHORESCENCE QUENCHING FOR DETERMINING PERMEABILITIES OF POLYMERIC FILMS TO GASES,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Jones,Peter F.

Report Date : MAY 1968

Pagination or Media Count : 16

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 poly(methylmethacrylate) to oxygen of (1.1 plus or minus 0.2) x 0.0001 sq.cm./sec.mole/1/mm was calculated. (Author)

Descriptors :   (*PLASTICS, PERMEABILITY), (*ACRYLIC RESINS, PERMEABILITY), (*PERMEABILITY, TEST METHODS), FILMS, GASES, PHOSPHORESCENCE, QUENCHING(INHIBITION), NAPHTHALENES, OXYGEN

Subject Categories : Plastics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE