Diffusion and sorption of organic liquids through polymer membranes. 5. Neoprene, styrene-butadiene-rubber, ethylene-propylene-diene terpolymer, and natural rubber versus hydrocarbons (C8-C16)

Nanomembrane Materials Based on Polymer Blends

“…The chain ends represent a discontinuity and may form sites for permeate molecules to be sorbed into glassy polymers [22]. The transport phenomenon is strongly related to the structure of elastomers [23]. Penetrant mobility in the polymer and the sorption magnitude can be influenced by the chain segmental mobility and the interactions of different elastomers.…”

Gas barrier efficiency of clay- and graphene-poly(isobutylene-co-isoprene) nanocomposite membranes evidenced by a quantum resistive vapor sensor cell

“…2, a multimeter records the QRS resistance changes as soon as they there are exposed to the VOC, in this case toluene. At the beginning of the test, a 0.3-cm 3 of VOC was injected in the bottom half of the vessel and vapor gets distributed with equal pressure throughout the chamber sealed with the test membrane. 13 The diffusion time of analytes through the QRS transducer is evaluated to a fraction of second, which is assumed to be negligible compared with the diffusion time through the membrane of several seconds.…”

“…Owing to these reasons, extensive works were done on the solvent barrier properties of various polymer-solvent systems. [2][3][4][5][6][7][8][9][10][11][12] On the other hand, classical techniques to measure diffusion properties require demanding preparation and are often time consuming.…”

Blend Membranes of Sodium Alginate/Poly(Styrene Sulfonic Acid) for Isopropanol Dehydration

“…Sorption data were obtained gravimetrically [14] for all the membranes in 10, 15, 20, 25 and 30 wt% water-containing feed mixtures. Dry weights of the circularly cut (diameter 2.5 cm) membranes were taken on a single-pan digital microbalance (Mettler model AE 240) to an accuracy of ±0.01 mg. Membranes were soaked in airtight test bottles containing 20 cm 3 of the test solvent.…”