Synthesis of a New Polysiloxane Containing Octaphenylcyclodisilazane

A new polysiloxane containing octaphenylcyclodisilazane was synthesized from the anionic polymerization of octamethylcyclotetrasiloxane (D4) and "seed solution" as initiator, which was prepared by hexamethylcyclotrisiloxane (D3) and the lithium salt of N,N'-bis (hydroxydi-phenyl)tetraphenylcyclodisilazane.