Abstract:
Effect of $\gamma$-irradiation on the dielectric properties of polymer composites based on polypropylene (PP) with Na$^+$-montmorillonite (MMT) nanoparticles has been investigated. It has been found that $\gamma$-irradiation in the dose range of 100–200 kGy leads to slight deterioration in the dependences of $\varepsilon=f(T)$ and $\operatorname{tg}\delta=f(T)$ of the polypropylene-based composite with Na$^+$-MMT filler. It has been hypothesized that the deterioration of dielectric properties during irradiation in composites is due to changes in crosslinking and degradation processes within the polymer matrix and at the polymer-filler interface. It has been indicated that due to $\gamma$-irradiation of polymer composites its dielectric and electrophysical properties can be expediently controlled.
Keywords:polypropylene, Na$^+$-montmorillonite, gamma irradiation, dielectric constant, dielectric energy loss.
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