Abstract: A process is provided for preparing a terminally functionalized polymer from a living polymer obtained by anionic polymerization of a diene monomer or mixture of a diene monomer and a vinyl aromatic hydrocarbon monomer which comprises reacting the living polymer with a compound having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are selected from the group consisting of H, alkyl, cycloalkyl, aryl, dialkylaminoaryl, aralkyl, and aprotic O, N and S- containing alkyl, cycloalkyl, aryl and aralkyl groups; wherein R.sub.3 is selected from the group consisting of alkyl, cycloalkyl, aryl, dialkylaminoaryl, aralkyl, and aprotic O, N and S- containing alkyl, cycloalkyl, aryl and aralkyl groups; with the proviso that at least one of the R.sub.1, R.sub.2 and R.sub.3 groups must be a dialkylaminoaryl group and that not all of the R.sub.1, R.sub.2 and R.sub.3 groups can be aryl groups.

Abstract: A process for producing benzene-soluble substantially linear dichlorophosphazene polymer having the formula (NPCl.sub.2).sub.x, in which x is greater than 20 and may be as high as 50,000 or higher, from a cyclic oligomer having the formula (NPCl.sub.2).sub.n, in which n is from 3 to 9, particularly the trimer (NPCl.sub.2).sub.3 or tetramer (NPCl.sub.2).sub.4, in the presence of a small but significant amount of an inorganic salt, preferably a halide of a metal such as Cr, Ni, Co, Cu, Fe, Mn or Mg which affords control of the molecular weight and avoids the formation of large amounts of gel.

Abstract: Thermal polymerization of (NPCl.sub.2).sub.3,4 is improved by conducting the polymerization in the presence of Lewis Acid type compounds of Al or B.