HPLC Study of the Kinetics of Intramolecular Cyclization of Two New Phenyldiazene Molecules. Analytical Properties of the Resulting Liquid Crystals |
| |
| Authors: | B Saïdat M H Guermouche J-P Bayle |
| |
| Institution: | (1) German Institute for Polymers (Deutsches Kunststoff-Institut), Schlossgartenstr. 6, D64289 Darmstadt, Germany;(2) Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium;(3) Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854-8087, USA |
| |
| Abstract: | A group of zeolites and a 3D nanoporous metal-organic material RPM-1 were tested as column packings for adsorption of isotactic polypropylene and linear polyethylene from dilute solutions. It was found that polyethylene is fully or partially retained from thermodynamically good solvents (1,1,2,2-tetrachloroethylene, 1,4-dimethylbenzene, diphenylether, 1,2-dichlorobenzene and 1,3-dichlorobenzene) at temperatures of 115 °C or 140 °C, when a specific type of zeolite with pore sizes 5–6 Å has been used as the column packing. Polypropylene was fully retained in another type of zeolite with pores of 7–12 Å, when diphenylether was used as the mobile phase. As far as known, this is the first system sorbent - mobile phase, where adsorption of polypropylene was observed. |
| |
| Keywords: | Column liquid chromatography Adsorption chromatography Zeolite adsorbents Polypropylene and polyethylene |
| 本文献已被 SpringerLink 等数据库收录！ |
|
