The effects of normal paraffins mobilizers on irradiated polypropylene

The n-paraffins blended with polypropylene (PP) as mobilizer had been investigated. The effectiveness of mobilizer (n-paraffins) on irradiated polypropylene is dependent on the molecular weight of mobilizer and its content on polypropylene. The n-docosame (n-C22) possesses the best effectiveness of radiation tolerance on PP among the mobilizer paraffins: n-decane (n-C10), n-hexadecane (n-C16), n-docosane (n-C22) and n-hexatriacontane (n-C36). The 2% (w/w) content of a given mobilizer is the most effective at reducing the embrittlement of irradiated PP as evidenced by the elongation at break. The physical properties of polypropylene with mobilizers such as density, Young's modulus, the Fraction of free volume and the weight swelling ratio in p-xylene at room temperature were measured. Above phenomena are related with the constructive of blended PP and demonstrated by its physical properties