Poly‐N‐vinylcarbazole. I. Preparation of N‐vinyl‐carbazole

Abstract

N‐Vinylcarbazole, when prepared from carbazole separated from coal‐tar fractions, did not show satisfactory polymerisation behaviour. This is due to sulphur‐containing impurities, and purification of the carbazole or of the vinylcarbazole has been only inadequate or unreproducible. The synthesis of carbazole from cyclohexanone and phenylhydrazine has been improved, and the vinylcarbazole obtained from such carbazole is low in sulphur and polymerises satisfactorily.