【摘要】 对聚磷酸铵(APP)的制备条件进行了优化,得到聚合度大于700的APP产品。优化制备条件:原料采用(NH4)2HPO4、P2O5、Urea,并在干燥氨气氛下300℃聚合反应大于40 min。所得APP产物经XRD检测为Ⅱ型。更多还原

【Abstract】 In this paper,the preparation conditions of the long-chain ammonium polyphosphate(APP) have been studied.The long-chain ammonium polyphosphate with polymerization degree more than 700 has been prepared.The(NH4)2HPO4、P2O5 and Urea have been polymerized in anhydrous ammonia at ratio of 1∶ 1∶ 0.5 and 300℃,and the reaction time of polymerization-reactant is 40 min.The obtained APP belongs to II type through XRD investigation.更多还原