CHARACTER AND APPLICATION OF FIRE RETARDANTS OF AMMONIUM POLYPHOSPHATES WITH HIGH DEGREE POLYMERIZATION
The polymeric conditions was optimized to prepare the APP with 600 average degrees polymerization ( DP ). The effects of all kinds preparation condition, such as different ammonium phosphates, components proportion, reaction temperature, reaction atmosphere, reaction time, treating temperature, treating time, treating atmosphere and so on, on degrees polymerization of APP were investigated. The results showed that when (NH4)2HPO4, P2O5, and urea (molar rate for 1:1:0.3) were uniformity mixed, then polymeric reaction was aroused for more than 20 min and 280～300℃, at the atmosphere of dry NH3, after polymeric reaction was finished, it was heated for about 100～120 min and 250～280℃, at the atmosphere of dry NH3. In the end, the powder of high degree polymerization of APP was prepared, the average degree polymerization of the prepared APP was more than 600 degrees analyzed by end-group titrimetric analysis
Gao zhi-qiang Song zhong-rong He jia-hong
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）