Nowadays, membrane technologies are essential to a wide range of commercial
applications in petrochemical, chemical, food, pharmaceutical, semiconductor …

Penetrant-induced plasticization has prevented the industrial deployment of many polymers
for membrane-based gas separations. With the advent of microporous polymers, new …

Physical aging of both thick and thin films of “high free-volume” glassy polymer, PIM-1
(polymer with intrinsic microporosity) was studied by monitoring changes in pure gas …

The application of membranes in gas separation and pervaporation requires materials that
are resistant to plasticizing feed streams. We demonstrate the relationship between CO2 …

The present paper deals with a molecular modeling-based characterization of the
distribution of free volume in a number of different stiff chain glassy polymers including …

Gas sorption and permeation of physically treated glassy polymeric membranes is studied
from the viewpoint of the transport mechanism and the control of microvoids in the …

We have developed almost defect-free Matrimid/polyethersulfone (PES) dual-layer hollow
fibers with an ultra-thin outer layer of about 10× 10− 6m (10μm), studied the effects of …

CO 2 and CH 4 mixed-gas solubility was measured in 3, 3′-dihydroxy-4, 4′-diamino-
biphenyl (HAB) 2, 2′-bis-(3, 4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA) …

The discovery of polytetrafluoroethylene (PTFE) in 1938 by Roy Plunkett [1] at DuPont
spurred the development of a wide variety of rubbery and glassy fluoropolymers. Early …

The description of permeability and diffusivity in glassy polymers has been revisited by
considering the diffusion coefficient as the product of a kinetic factor, mobility, and a …