Role of Ring Strain and Steric Hindrance in a New Method for Synthesis of Macrocyclic and High Polymeric Phosphazenes

摘要

Ring strain induces the ring-opening polymerization of phosphazene trimers that bear no halogen substituents. This is of considerable importance because it had previously been assumed that side group halogen atoms were a prerequisite for access to the ring-opening polymerization mechanism. Keywords: Polyphosphazenes, Halogens Alkylradicals, Aryl radicals, Reprints. (AW)