Additives to improve the electret performance of polypropylene

Enhancing the charge storage capability of thermoplastic polymers can be achieved at least by (i) the creation of obstacles such as highly elongated pores in the polymer film to substantially lengthen the pathway for charge recombination, (ii) the tailored chemical modification of the polymer backbone, and (iii) the addition of functional additives to create charge traps. This work focuses on the functional additive approach. Novel compounds to improve the electret performance of isotactic polypropylene (i-PP) were synthesized, which act as charge traps.