尿素增效剂聚天门冬氨酸的分子量及其分布测定  

MEASUREMENT OF ABSOLUTE MOLECULAR WEIGHT AND ITS DISTRIBUTION OF POLYASPARTIC ACID AS UREA SYNERGIC AGENT

作　　者：郭明海 

机构地区：[1]浙江镇海炼化股份有限公司技术中心,浙江宁波315207

出　　处：《大氮肥》2006年第1期29-31,共3页Large Scale Nitrogenous Fertilizer Industry

摘　　要：聚天门冬氨酸是一种用途广泛的新型化工试剂，逐渐被应用于尿素增效剂，它的分子量及其分布对其使用性能有较大影响。通过高温凝胶在线黏度色谱仪（CPCV），可以简化特性黏度的计算，快速得到聚天门冬氨酸的分子量及其分布，分子量的最大偏差在1．02％～4．2％之间，同时给出35℃时，0．1mol／L硝酸钠溶液中聚天门冬氨酸溶液的K值为1．09×10^-3dL/g，α为0．40。As a new widely used chemical agent, polyaspartic acid is being gradually used as urea synergic agent. Its molecular weight and molecular weight distribution have great impact on its performances. By using GPC/Viscometry, the calculation of intrinsic viscosity can be simplified, and the absolute molecular weight and its distribution of polyaspartic acid are quickly determined, too. The largest error is in the range of 1.02%～4.2%,and the value of K is 1.09×10^-3 dL/g and a is 0.40 in the 0.1 mol/L sodium nitrate solution at 35℃.

关 键 词：凝胶渗透色谱法 聚天门冬氨酸 分子量 分子量分布 黏度 

分 类 号：TQ441.41[化学工程—化学肥料工业]