Poly‐<i>N</i>‐vinylcarbazole. II. Preparation, moulding and dielectric properties

Abstract Polymerisations of N ‐vinylcarbazole have been carried out in bulk and in suspension, to provide a machinable material, a moulding powder and a novel foamed polymer. The dielectric properties of the polymer were found to be of the same order as those of polystyrene, having a dielectric constant of 3.00 and a power factor of about 0.0010 over a wide frequency range but were more stable to changes of frequency and temperature; mechanically it is marginally inferior, but has a superior thermal stability.