Association of hard segments in gas separation through polyurethane membranes with aromatic bulky chain extenders was written by Fakhar, Afsaneh;Sadeghi, Morteza;Dinari, Mohammad;Lammertink, Rob. And the article was included in Journal of Membrane Science in 2019.Quality Control of 4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine The following contents are mentioned in the article:
Poly(urethane-urea) (PUU) membranes based on contributing hard segments in gas separation were prepared using 2 novel bulky chain extenders, polytetramethylene glycol, isophorone and hexamethylene diisocyanate. The chain extenders were synthesized by cyanuric chloride, aniline/naphthylamine and hydrazine. According to FTIR, AFM and DSC, bulkier PUU membranes showed more phase separation and lower glass transition temperature consistent with higher fractional free volume, which were correlated with single (CO2, CH4, O2 and N2) and mixed (CO2:N2 and CO2:CH4) gas permeation results. The main findings indicate these polyurethanes serve efficiently designed mol. structures favoring bulky hard segments contribution in gas separation The bulky PUU membranes afford simultaneous increased permeability and selectivity, while maintaining high tensile properties. Enhanced O2/N2 diffusivity selectivity by bulkier PUU and CO2 sorption/desorption study by Ellipsometry confirmed hard segments’ association, too. The bulkiest membrane provided 126% and 54% improvement for single CO2 permeability and CO2/N2 selectivity compared to linear one. This study involved multiple reactions and reactants, such as 4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine (cas: 2272-40-4Quality Control of 4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine).
4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine (cas: 2272-40-4) belongs to organic chlorides. An organic chloride is an organic compound containing at least one covalently bonded atom of chlorine. Their wide structural variety and divergent chemical properties lead to a broad range of names and applications. Alkyl chlorides readily react with amines to give substituted amines. Alkyl chlorides are substituted by softer halides such as the iodide in the Finkelstein reaction.Quality Control of 4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics