SYNTHESIS AND TRANSPORT-PROPERTIES OF POL YNORBORNENE WITH DIFFERENT CONTENT OF CIS-TRANS UNITS

Polynorbornenes with different contents of cis units were prepared wit h the catalysts of metathesis ring-opening polymerization, which show different stereoselectivity (Re2O7, RuCl3, WCl6). It was shown that po lynorbornene synthesized with WCl6, which contains nearly equal amount s of cia and trans units, is characterized by the highest diffusion co efficients for gases. The polymers, that predominantly consist of cia units in the backbone chain show higher gas permeabilities P, higher d iffusion D and solubility coefficients S for gases. The separation fac tors alpha(ij) = P-i/P-j are maximal for the polymers with trans confi guration of the chains, which exhibit minimal P-i values.