Author/Authors :
Shi، نويسنده , , Dean and Yang، نويسنده , , Jinghui and Yao، نويسنده , , Zhanhai and Wang، نويسنده , , Yong and Huang، نويسنده , , Hongliang and Jing، نويسنده , , Wu and Yin، نويسنده , , Jinghua and Costa، نويسنده , , Giovanna، نويسنده ,
Abstract :
In this work, chemical structures and molecular parameters of grafted materials of PP-g-MAH prepared by melt reactive extrusion were studied by using electrospray ionization-mass spectrometer and gel permeation chromatography. It was found that the initial radicals, due to homolitic scission of dicumyl peroxide could be combined with maleic anhydride (MAH) monomers as well as polypropylene (PP) molecular chains. The homopolymerization of MAH cannot occur and the MAH radicals undergo a dismutational reaction under the processing condition (180–190°C). A modified mechanism of melt grafting MAH onto PP has been proposed tentatively on the basis of our experimental results and other experimental findings published in the literature.
