The polyphosphazenes([N=PR 2] n),with a backbone of alternating phosphorus and nitrogen atom and two substituants at each phosphorus,are the most versatile class of novel polymers.

• 聚磷腈是一类骨架由磷-氮原子交替排列侧链键合各种取代基团且具有广泛应用的新型高分子化合物。