23 research outputs found
Structural features of disubstituted polyacetylenes with bulky substituents at double bonds
No full textHigh permeable PTMSP/PAN composite membranes for solvent nanofiltration
Get PDFThis paper describes the preparation of composite membranes comprising a poly[1-(trimethylsilyl)-1-propyne] (PTMSP) top-layer on a porous poly(acrylonitrile) (PAN) support. The PTMSP layer has different top-layer thickness in the range of 0.7–6.3 μm. The optimized PTMSP/PAN composite membranes with top-layer thickness of about 1 μm have ethanol permeability of 3.8 kg/(m2 h bar) and 90% retention of the negatively charged dye Remazol Brilliant Blue R (MW 626.5) at 5 bar. The permeability of methanol, ethanol or acetone through the PTMSP/PAN composite membranes is higher than a number of commercial available nanofiltration membranes, whereas all membranes have rejection of about 90% for negative charged dyes of different molecular weight. The permeability of methanol, ethanol and acetone through the PTMSP/PAN composite membranes depends on solvent viscosity and membrane swelling; the solvent viscosity seems to be the dominant factor
Study of glassy polymers fractional accessible volume (FAV) by extended method of hydrostatic weighing: Effect of porous structure on liquid transport,
No full textSynthesis and Gas-Transport Properties of Poly(1-trimethylsilyl-1-propyne)- and Poly(4-methyl-2-pentyne)-Based Chlorinated Polyacetylenes for Membrane Separation of Carbon Dioxide
No full textLiving polymerization of 4-methyl-2-pentyne and 1-trimethylsilyl-1-propyne initiated by NbCl5-Ph4Sn catalyst
No full textMembrane Control of the Composition of Synthesis Gas Using Membranes Based on Modified 1,2-Disubstituted Polyacetylenes
No full textEffect of solvent nature on the optical anisotropy of poly(1-trimethylsilyl-1-propyne) molecules
No full textCopolymerization of 4-methyl-2-pentyne with 1-trimethylsilyl-1-propyne and 1-trimethylgermyl-1-propyne with Nb-containing catalysts
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