A Study on Preparation of Functionalized Ultra-Fine Polypropylene Powder through a Mechanochemical Method

In this paper, a mechanochemical method was established to prepare functionalized ultra-fine polypropylene powder. Through pan-milling by a self-designed pan-type mechanochemical reactor, polypropylene (PP) was finely pulverized, during the process, Inorganic peroxide solution was sprayed onto the PP powder surface to realize its rapid functionalization taking advantages of the mechanochemical effects caused by milling. Analysis results of electron spectroscopic chemical analysis (ESCA) show the PP ultra-fine powder prepared by this method can obtain over 0.1 oxygen content (O/C). Some factors influencing functionalization degree, including concentration, spraying amount of Inorganic peroxide solution and milling temperature, were discussed. Besides, the degradation of PP during this process was investigated.