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- W2361897859 abstract "Using a double-screw extruder,the characters of polypropylene(PP) melt-grafted by maleic anhydride(MAH) with and without adding the assistant were studied respectively.The operation conditions of melt-grafting MAH onto PP were optimized by orthogonal experiment.The degradation of PP was characterized by melt flow rate(MI).The influences of the amounts of MAH,initiator dicumyl peroxide(DCP) and the assistant sulfo-dipropionate dilaurate(ABX) on the degradation of PP were investigated.The degradation mechanism of PP and the mechanism of restraining degradation of PP by the assistant ABX were analyzed.The analysis shows that the degradation reaction of PP is caused by PP macro-radical,which is produced under the effects of the initiator DCP and the MAH.The reason of why the assistant ABX could reduce the degradation reaction of PP is that,on the one hand,electron-donating group of the assistant ABX could reduce the free radical transfer reaction inner and inter the molecules of PP,which works as the negative catalyst,on the other hand,the assistant ABX could reduce the activity of excited state molecules of MAH." @default.
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- W2361897859 date "2007-01-01" @default.
- W2361897859 modified "2023-09-23" @default.
- W2361897859 title "Degradation Mechanisms of Melt-Grafting Maleic Anhydrid onto Polypropylene" @default.
- W2361897859 hasPublicationYear "2007" @default.
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