title: High-performance membranes from polyimides with intrinsic microporosity.
abstract: Membranes with high permeability to gases are formed from polyimides with rigid backbones that incorporate a spiro-centre. A route to this new range of high-free-volume polyimides is demonstrated, and exceptional performance is obtained for a polymer containing a dimethyl binaphthyl unit.
authors.affiliation: School of Chemistry Cardiff University Cardiff CF10 AT (UK).
authors.forename: Bader S
authors.initials: BS
authors.lastname: Ghanem
authors.forename: Neil B
authors.initials: NB
authors.lastname: McKeown
authors.forename: Peter M
authors.initials: PM
authors.lastname: Budd
authors.forename: James D
authors.initials: JD
authors.lastname: Selbie
authors.forename: Detlev
authors.initials: D
authors.lastname: Fritsch
keywords: membranes; microporous materials; polyimides; polymers