【摘要】 通过实验对高聚合度聚磷酸铵的聚合条件进行优化,制备了平均聚合度为390的聚磷酸铵,考察物料配比、反应温度、反应气氛、反应时间、反应压力和处理温度、处理时间等对平均聚合度的影响。结果表明,n[(NH4)2HPO4]∶n(P2O5)∶n[CO(NH2)2]=1.0∶1.0∶0.3,湿氨气反应气氛,反应温度270℃,反应时间30 min,反应压力2.0 MPa,热处理温度250℃,热处理时间120 min为制备高聚合度的聚磷酸铵阻燃剂的最佳工艺条件。更多还原

【Abstract】 The polymeric conditions were optimized to prepare the ammonium polyphosphate(APP) with the average polymerization degree of 390.The effects of preparation conditions such as component proportion,reaction temperature,reaction atmosphere,reaction time,reaction pressure,treating temperature and treating time on the average polymerization degrees of APP were investigated.The following are the optimal technological conditions to prepare APP flame retardant of high polymerization degrees: n[(NH4)2HPO4]∶n(P2O5)∶n[CO(NH2)2] = 1.0∶1.0∶0.3,reaction atmosphere of wet ammonia,reaction temperature of 270 ℃,reaction time of 30 min,reaction pressure of 2.0 MPa,treating temperature of 250 ℃,treating time of 10 min.更多还原