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EFFECT OF THE PROCESSING CONDITIONS ON PP-g-MA PROPERTIES IN REACTIVE EXTRUSION

Ma Li

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Abstract

Functionalization of polypropylene(PP) has been performed by means of melt grafting reaction of maleic anhydride(MA), initiated by dicumyl peroxide(DCP) in reactive extruder. The effect of the processing conditions on the properties of polypropylene grafted maleic anhydride product (PP-g-MA) was studied. Results show that PP-g-MA grafting degree decreases with reaction temperature or screw speed of reactive extruder increased; Styrene is the best second monomer for grafting reaction; PP-g-MA grafting degree and melt flow rate become high with DCP content increasing. It shows that the unreacted MA exists very little in PP-g-MA product and does′t affect its processing and applications.

About this research paper

What this paper is about

Functionalization of polypropylene(PP) has been performed by means of melt grafting reaction of maleic anhydride(MA), initiated by dicumyl peroxide(DCP) in reactive extruder. The effect of the processing conditions on the properties of polypropylene grafted maleic anhydride product (PP-g-MA) was studied. Results show that PP-g-MA grafting degree decreases with reaction temperature or screw speed of reactive extruder increased; Styrene is the best second monomer for grafting reaction; PP-g-MA grafting degree and melt flow rate become high with DCP content increasing. It shows that the unreacted MA exists very little in PP-g-MA product and does′t affect its processing and applications.

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Available abstract

Functionalization of polypropylene(PP) has been performed by means of melt grafting reaction of maleic anhydride(MA), initiated by dicumyl peroxide(DCP) in reactive extruder. The effect of the processing conditions on the properties of polypropylene grafted maleic anhydride product (PP-g-MA) was studied. Results show that PP-g-MA grafting degree decreases with reaction temperature or screw speed of reactive extruder increased; Styrene is the best second monomer for grafting reaction; PP-g-MA grafting degree and melt flow rate become high with DCP content increasing. It shows that the unreacted MA exists very little in PP-g-MA product and does′t affect its processing and applications.

Key concepts: Maleic anhydride, Reactive extrusion, Polypropylene, Grafting, Materials science, Plastics extrusion, Melt flow index, Monomer

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