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Citation: SHI De-An, YIN Jing-Hua, KE Zhuo. On the Mechanism of Melt Grafting of Isotactic Polypropylene with Maleic Anhydride[J]. Chinese Journal of Applied Chemistry, ;2001, 18(11): 865-868. shu

On the Mechanism of Melt Grafting of Isotactic Polypropylene with Maleic Anhydride

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
2.
b Department of Polymer Science & Engineering, University of Science & Technology of China, Hefei

Received Date: 28 February 2001
Available Online: 3 July 2001
Fund Project: 国家"九七三"项目(G1999064806) (G1999064806)国家自然科学基金(59873022)资助课题 (59873022)

The grafting degree and shear viscosity under constant shear stress of PP-g-MAH as function of contents of MAH, dicumyl peroxide(DCP) and additives has been investigated. The mechanism of melt grafting of polypropylene(PP) with maleic anhydride(MAH) proposed previously by authors is proved to be correct through reactive extrusion. It is evident that decreasing the tendency of reaction between the peroxide radicals and the MAH monomer and enhancing the tendency of reaction between the macromolecular radicals and MAH will result in the formation of final product having higher grafting degree and higher molecular weight simultaneously.
- isotactic polypropylene,
- maleic anhydride,
- graft copolymerization,
- mechanism
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