title: In-situ polymerized PLOT columns III: divinylbenzene copolymers and dimethacrylate homopolymers.
abstract: Studies of divinylbenzene copolymers and dimethacrylate homopolymers indicate that the polymer pore size controls the separation of water and ammonia on porous-layer-open-tubular (PLOT) columns. To a lesser degree, the polarity of the polymers also affects the separation of a water-ammonia gas mixture. Our results demonstrate that the pore size can be regulated by controlling the cross-linking density or the chain length between the cross-linking functional groups. An optimum pore size will provide the best separation of water and ammonia.
authors.affiliation: SETI Institute, NASA, Ames Research Center, Moffett Field, California 94035-1000,USA.
authors.forename: T C
authors.initials: TC
authors.lastname: Shen
authors.forename: M M
authors.initials: MM
authors.lastname: Fong
mesh_terms: D000641:Ammonia / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D018559:Exobiology / Q000379:methods; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry; D012995:Solubility; D020058:Styrene; D013343:Styrenes / Q000737:chemistry*; D014753:Vinyl Compounds / Q000737:chemistry*; D014867:Water / Q000032:analysis*
chemical_list: D003432:Cross-Linking Reagents; D008689:Methacrylates; D011108:Polymers; D013343:Styrenes; D014753:Vinyl Compounds; D014867:Water; D020058:Styrene; D000641:Ammonia; C004985:divinyl benzene