摘要
通过精确测定浓度范围在110%-119%的多聚磷酸的浓度,配之以理论分析,系统地比较研究了新型Nessler管粘度法和传统的酸碱滴定法、平均链长法的测试精度及稳定性。对于Nessler管粘度法,通过Matlab软件对数据的分析,得到多聚磷酸的粘度-浓度关系曲线,从理论上证明了在多聚磷酸浓度大于115%时该方法具有显著的优越性。同时,通过分析多聚磷酸的粘度-温度关系,定量地估计了控温精度对浓度测试精度的影响。更重要的是通过对Nessler粘度管的改进,大大地提高了多聚磷酸得测试精度及重复性。
The accuracy and consistency of the new Nessler tube method were systematically studied versus the traditional acid-base titration and average chain-length methods through concentration measurements on poiyphosphoric acid （PPA） with concentrations ranging from 110% to 119%. Quantitative analysis of relation-ship between viscosity and concentration clearly showed the superiority of the Nessler tube method especially when the concentration was above 115 %. Study of PPA＇s viscosity-temperature property also gave quantitative estimation on errors caused by temperature fluctuation. Most importantly, the accuracy of the method had been greatly imoroved through modification of the Nessler tube.
出处
《化工技术与开发》
CAS
2007年第5期41-44,共4页
Technology & Development of Chemical Industry
