| 摘要 |
PURPOSE:To obtain a separation membrane having high permeation coefft. for gas preserving a high selectivity for the separation of gaseous mixture from a chain polymer having a specified number average mol.wt. comprising monosubstituted acetylene. CONSTITUTION:Catalyst liquid slurry comprising mixture of liquid slurry of hexachlorotungsten in toluene with liquid slurry of tetraphenyl tin in toluene is added to a soln. of monosubstituted acetylene monomer expressed by the formula in toluene, and stirred. Obtd. powdery polymer having >=1,000 number average mol.wt. is dissolved in toluene, and a porous membrane is immersed in the soln. to coat the surface of the porous membrane. The membrane is dried to obtain a compound membrane. |
