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K. Kelar, K. Kania, B. Jurkowski

A mechanochemical modification of a third-generation polyethylene with maleic anhydride

Polimery 2000, No 6, 393


DOI: dx.doi.org/10.14314/polimery.2000.393


Summary

Reactive extrusion in a Brabender extruder equipped with a conventional annular or a prototype mixer (static or dynamic) was used to graft maleic anhydride onto a third-generation PE in the presence of benzoyl peroxide as initiator. IR spectroscopy (band intensity at 1780 cm-1 attributable to anhydride's CO group stretching vibrations) confirmed grafting to have occurred and to rise as the initiator's concentration and shearing stress (Fig. 2) were increased. At low peroxide initiator's concentrations, grafting was not accompanied by cross-linking side reactions of PE chains. As the initiator's concentration was increased, the melt index and the degree of crystallinity of the products of the mechanochemical reactions decreased (Figs. 3, 4).
Keywords: third-generation polyethylene, maleic anhydride, radical initiator, reactive extrusion, mechanochemical functionalization
K. Kelar, K. Kania, B. Jurkowski (483.3 KB)
A mechanochemical modification of a third-generation polyethylene with maleic anhydride