APPLICATION OF THE MODIFIED COPOLYMER OF STYRENE TO HARDEN JUNK PAPER TYPES
Article is devoted studying of effectivness of the reinforcing of first received additives on the basis of copolymers of styrene and maleic anhydride on the properties of paper from waste paper raw materials. It was established, that modification of copolymers of styrene advisable to carry out NH4OH, preferred maleic anhydride content of 20−22 mol. %. The molecular weight of maleic anhydride copolymers should be in the range 5500−6500. Strengthening effect is manifested in the styrene content in their fibrous slurry in an amount of 0,5% by weight of abs. dry. The drying temperature (120 ± 2)°C enhances this effect, as evidenced by the strength of the paper samples.