made of polypropylene the slurry flows through the screen mesh in strip shapes and comes into cool deionized water strip like polymer materials are formed after the slurry contacts with cool deionized water then the strip like polymer is taken out and washed with deionized water several times to remove the free acid in the polymer until the ph of the water after washing is about 7 the washed strip like polymer is placed into a drying oven and dried at 120 u00b0 c for 4 hours until the strip like polymer turns red brown the dried sulfonated poly ether ketone 2 is crushed for later use the degree of sulfonation of the sulfonated poly ether ketone 2 is measured as 85 by titration method 10 g of poly ether ether ketone victrex plc 381g melt viscosity of 381 pa u00b7 s at 400 u00b0 c is added into a three neck flask containing 100 ml of concentrated sulfuric acid 98 at room temperature under stirring electrically the three neck flask is then put into a thermostatic waterbath at a set temperature of 35 u00b0 c and allowed to react for 3 hours then the temperature of the thermostatic waterbath is increased to 75 u00b0 c.