초록 ▼

A system for measuring the permeation rate of organic molecules across a polymer film, which includes a membrane chamber, an electron impact mass spectrometer and a flow-through hollow fiber probe for providing an interface between the membrane chamber and the mass spectrometer. The membrane chamber

A system for measuring the permeation rate of organic molecules across a polymer film, which includes a membrane chamber, an electron impact mass spectrometer and a flow-through hollow fiber probe for providing an interface between the membrane chamber and the mass spectrometer. The membrane chamber supports the polymer film sample to be tested, and permits one side of the sample to be exposed to a vapor containing a known concentration of organic molecules under substantially atmospheric pressure and controlled environmental conditions on both the upstream and downstream sides of the sample. The membrane chamber features a unique permeation cell and sample holder arrangement which employs a pair of adhesive backed cards to sandwich the sample and maintain a permanent desirable alignment of the sample.

대표청구항 ▼

A system for measuring the permeation rate of organic molecules across a polymer film, comprising: chamber means for supporting a polymer film sample and permitting an upstream side of said polymer film sample to be swept with a fluid containing organic molecules and a downstream side of said polyme

A system for measuring the permeation rate of organic molecules across a polymer film, comprising: chamber means for supporting a polymer film sample and permitting an upstream side of said polymer film sample to be swept with a fluid containing organic molecules and a downstream side of said polymer film sample to be swept with a carrier fluid under substantially atmospheric pressure and controlled environmental conditions on at least the upstream side of said polymer film sample; interface means in communication with the downstream side of said polymer film sample for enabling organic molecules which have permeated across said polymer film sample to be subjected to low pressure mass spectrometry analysis; and mass spectrometer means for analyzing the concentration of said permeant organic molecules in said carrier gas.