Peroxy maleic anhydride

Krivoguz Y.M., Yuvchenko A.P., Pesetsldi S.S., Bei M.P., Functionalization of polyethylene with peroxy-containing formulations derived from resins modified with maleic anhydride. Properties of blends of functionalized polyethylene with... 

The functionalization of EPDM with MA is carried out in a Berstorff 25 mm corotating twin screw extruder. EPDM (Keltan 740 DSM), Perkadox 14 (bis(tert. butyl peroxy isopropyl) benzene AKZO half life times 5 min at 175 °C 10 sec at 210 °C [4]) and Nourymix(50/50 wt% masterbatch of MA on polyethylene AKZO) were mixed and starved fed to the first section of the extruder. A nitrogen atmosphere was maintained over the reaction mixture throughout the extruder. In the last sections free maleic anhydride and other volatile components were removed by applying vacuum on the last vent. Standard extrusion conditions were throughput rate 1 kg/h residence time 5 minutes rotor speed 150 rpm Mass temperatures in the die 220-260 OC. The MA-content in the rubber was determined with potentiometric titration and infrared analysis. 

In the paper the interaction of the syndiotactic 1,2-polybutadiene and the reagents of different chemical nature as ozone, peroxy compounds, halogens, carbenes, aromatic amines and maleic anhydride are considered. Various polymer products with a set complex of properties is possible to obtain on the syndiotactic 1,2-polybutadiene basis varying the nature of the modifying agent, a functionalization degree of the polymer and synthesis conditions. 

In the paper the interaction of the syndiotactic 1,2-PB and the reagents of different chemical nature as ozone, peroxy compounds, halogens, car-benes, aromatic amines and maleic anhydride are considered. 

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