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Polymer electrets have been prepared and studied by measuring thermally stimulated discharge currents. Two current maxima have been observed for samples of polystyrene, poly(p-chlorostyrene), and a random copolymer of styrene and p-chlorostyrene. These maxima are attributed to dipole reorientation· accompanying the glass transition and to real charge drifts. Poly(2,6 dimethyl-1,4-phenylene oxide) and blends of this polymer with the three aforementioned polymers were also studied. In thesedoi:10.1063/1.322449 fatcat:3tpvtxhtgvge3od7d3ctp77nfy