| 摘要 |
Poly(organophosphazenes) containing repeating units of the structure: <IMAGE> wherein X and X' represent organic substituents which may be the same or different and n is from 20 to 50,000, are prepared by a process which involves reacting a poly(dichlorophosphazene) having the formula -(NPCl2)n-, in which n is from 20 to 50,000, with an active hydrogen-containing compound in the presence of a bicyclic amidine represented by the structure: <IMAGE> in which m is an integer of from 1 to 10. A unique aspect of the process of the invention is that it can be utilized to prepare such poly(organophosphazenes) utilizing either soluble or gelled (insoluble) poly(dichlorophosphazenes) as starting materials. |
