STRUCTURALLY SELECTIVE PROPERTIES OF NUCLEAR-PORE FILTERS BASED ON POLYPROPYLENE

Using IR spectroscopy, we have established that bombardment of polypro pylene with accelerated Xe+6 ions leads to radiation-induced and post- radiation oxidation with formation of carbonyl and hydroxyl groups and amorphization of its structure. Upon subsequent treatment of the bomb arded polymer with sulfuric acid-dichromate cleaning solution, we see formation of not only a porous structure but also of a surface thin la yer (approximately 0.01 mum) with amorphous structure. We present the results of a study of the structurally selective properties of nuclear -pore filters obtained on the basis of thin polypropylene films bombar ded with accelerated heavy ions and etched with sulfuric acid-dichroma te cleaning solution.