Synthesis and Properties of Metathesis Polymer Based on 3-Silatranyltricyclo[4.2.1.0 2.5 ]non-7-ene

A new metathesis polynorbornene containing bulky and reactive silatrane side groups is synthesized, and its gas-transport properties are investigated. The metathesis polymerization of 3-silatranyltricyclo[ 4.2.1.02.5]non-7-ene is conducted in the presence of the first-generation Grubbs catalyst. The homopolymer is obtained with a nearly quantitative yield of 98% and a molecular mass of Mw = 1.3 × 106 (Ð = 3.7). According to X-ray phase analysis, the homopolymer is amorphous and its glass-transition temperature is 232°С (DSC). The gas permeability of the metathesis polymer for a set of gases, including He, H2, O2, N2, CO2, and CH4, is investigated, and the corresponding diffusion and solubility coefficients are determined.