“…Materials 5-Ethylidene-2-norbornene, 5-vinyl-2-norbornene, Karstedt's catalyst, Rh(acac)(CO) 2 , triethylsilane (Et 3 SiH), 1,1,1,3,5,5,5heptamethyltrisiloxane (HMTS-H), 1,1,3,3,3-pentamethyldisiloxane (PMDS-H) as well as all solvents were purchased from ABCR and Aldrich, and used without additional purification. Vinyl-addition poly(5-vinyl-2-norbornene) (PVNB), 35 2-vinyl-norbornane, 40 and 2-ethylidene-norbornane 46 were syn- Table 6 Solubility coefficients of various gases within the modified vinyl-addition polynorbornenes in comparison with vinyl-addition polynorbornene (PNB) 44 and PVNB Polymer Solubility coefficient (S), S × 10 3 , cm 3 (STP) cm −3 cm (Hg) Fig. 11 The dependences of diffusion (a) and solubility (b) coefficients on the squared cross-section diameter and critical temperature of penetrants, respectively, for the modified vinyl-addition polynorbornenes.…”