Effect of E-beam irradiation on crystalline-phase transition of PVDF/nanoclay nanocomposites

PVDF/nanoclay nanocomposites were prepared by melt-mixing method using 1, 3, 5 and 7 percent of Cloisite 30B as nanoclay. All samples were exposed to electron beam irradiation doses of 100, 200, 300, 400 and 500 kGy. The FTIR analysis of the absorption bands at 763 and 840 cm-1 belonging respectively to α and β phases indicated that the β crystalline content was affected by presence of nanoclay, its content and slightly by the level of electron beam irradiation dose. The nanocomposite containing 7 percent of nanoclay showed the highest amount of β phase. At irradiation dose of 100 kGy (as measured by DSC) the increase in crystallinity was along with slight decrease in the melting and crystallization temperatures of the nanocomposites. At higher irradiation doses crystallinity, melting and crystallization temperatures decreased significantly due to degradation of PVDF.

کلیدواژه ها:

PVDF ، nanoclay ، electron beam ، crystallinity