Preparation of novel PP-g-BMA sorbent by two-step irradiation method for elimination of homopolymerization in grafting process
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In this work, an improved approach for preparing a novel and reusable sorbent (PP-g-BMA) based on butyl methacrylate (BMA) monomer and low-density polypropylene (PP) matrix was developed, in which the covalent bonding between BMA monomer and polypropylene PP matrix was introduced by a two-step grafting method, electron beam and ultraviolet irradiation. PP was irradiated by electron beam to generate surface radicals. Then, the pretreated PP was impregnated with BMA solution and the loaded monomer was grafted on the PP matrix by ultraviolet (UV). The optimum grafting condition at which the grafting process proceeds extensively and homogeneously was investigated. The experimental results pointed out that the two-step method could successfully avoid homopolymerization in the grafting process and increase the sorption capacity of PP matrix effectively.
KeywordsPolypropylene fiber Electron beam Ultraviolet Sorption capacity Graft polymerization Butyl methacrylate
This research was supported by the National Natural Science Foundation of China (No. 51278392).