Mansouri, Mahsa published the artcileGas permeation properties of highly cross-linked castor oil-based polyurethane membranes synthesized through thiol-yne click polymerization, Related Products of alcohols-buliding-blocks, the main research area is gas permeation castor oil polyurethane membrane.
In this paper, a new chem. approach was developed for synthesis of castor oil (CO)-based polyurethane (PU) membranes to attain improved structural properties for gas separation applications. For this purpose, propyne-terminated CO-based PU prepolymer (PTPU) was synthesized by the reaction of CO and isophorone diisocyanate (IPDI), followed by propargyl alc. (PrAl) and isocyanate (NCO) terminated prepolymer reaction. The ultimate membranes were prepared through thiol-yne crosslinking reaction of PTPU and pentaerythritol tetrakis (3-mercaptopropionate) (PETMP), in presence of azobisisobutyronitrile (AIBN), as a reaction initiator. It was revealed that mech. and thermal properties of the prepared membranes were improved owing to the formation of flexible thioether linkages through crosslinking reaction. The gas permeation measurements were carried out in the temperature and pressure ranges of 298-338 K and 200-1200 kPa, resp. The results exhibited reverse size selective performance, as a typical transport behavior of rubbery membranes. The infinite dilution permeability coefficient of CO2 at 298 K was found identical to 2.78 Barrer, along with the infinite dilution perm-selectivity values for CO2/CH4 and CO2/H2 obtained equal to 25.27 and 7.94, resp. Furthermore, higher permeation activation energies were found in this work compared to a number of crosslinked rubbery membranes in the literature, such as poly (dimethylsiloxane) (PDMS) and poly(ethylene glycol) diacrylate (PEGDA).
Reactive & Functional Polymers published new progress about Activation energy. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Related Products of alcohols-buliding-blocks.
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