prepared by dissolving 0 8 g of tzpim polymer synthesized in example 1 in a solvent mixture consisting of 19 6 g of 1 2 3 trichloropropane and 19 6 g of dichloromethane the solution was filtered using a 1 micron sized filter to remove any insoluble impurities and debubbled overnight one drop of tzpim polymer solution was introduced to the surface of a pure water bath the tzpim solution spread on the surface of water with simultaneous solvent evaporation to form a thin tzpim film on the surface of water the thin tzpim film on the surface of water was then laminated onto the surface of a low selectivity high permeance porous polymeric support membrane the resulting tfc tzpim membrane was dried at 70 u00b0 c for 1 hour in a conventional oven the surface of the tzpim layer of the tfc tzpim membrane was dip coated with a rtv615a 615b silicone rubber solution the coated membrane was dried inside a hood at room temperature for 30 minutes and then dried at 70 u00b0 c for 1 hour in a conventional oven the uv cross linked tfc tzpim polymer membranes were prepared by further uv cross linking the tfc tzpim membranes containing uv cross linkable nitrile groups using a uv.