| 摘要 |
Homopolymers of isopropenylpyridine of softening point between 100 DEG and 240 DEG C., are made by polymerizing an isopropenylpyridine, preferably the 2- or 4-substituted pyridene in the presence of a compound selected from Group I to III of the Mendel</>eeff Periodic Table. The compound may be magnesium diethyl amide bromide, phenyl magnesium bromide, n-butyl lithium, beryllium diethyl, magnesium diethyl, N-carbazyl lithium, beryllium-bis-(dimethylamide), magnesium phenylmethylamide bromide, aluminium-tris-(dimethylamide), lithium aluminium hydride, or complexes of the type LiAl[N(C6H5)2]3H, and <FORM:0920559/IV(a)/1> which may be prepared in accordance with Specification 912,404. The polymerization may be effected in bulk, or in the presence of a solvent such as an aliphatic or aromatic hydrocarbon. The polymers may be purified by treatment with dilute acids. The polymers are insoluble in aliphatic hydrocarbons and in boiling ethyl or isopropyl ether. The polymers alone, or in admixture with other hydrocarbon polymers may be extruded into fibres.
|
