部分水解聚丙烯酰胺过滤因子研究

测定了在室内按不同聚合、水解、干燥条件及使用不同干燥设备制备的聚丙烯酰胺（PAM）和部分水解聚丙烯酰胺（HPAW）的过滤因子，找出了影响过滤因子的规律。水解度对过滤因子无影响，而引发体系、聚合温度、水解方式、干燥温度、干燥时间、干燥设备对过滤因子影响极大。提出了“嵌段水解体的存在是造成HPAM过滤因子增大的原因”这一假设，这对合成可满足三次采油要求的低过滤因子、高分子量部分水解聚丙烯酰胺，具有指导意义。

A LABORATORY STUDY ON FILTER COEFFICIENT OF POLYACRYLAMIDES FOR EOR

The filter coefficient of PAM/HPAM is investigated in laboratory as influenced by different variables of AM polymerization, PAM hydrolysis, and gelled polymer drying and by the type of drying equipment used. It is shown that the hydrolysis degree has no effect and the polymerizing temperature, the way of hydrolysis, the drying temperature and pened, and the type of drying equipment have significant effects upon the filter coefficience of PAM/HPAM. A concept of long blocked hydrolyzed chain segments is postulated to explain the microgel formation and the increasing of filter coefficient of HPAM. The optimum technologic parameters for preparing HPAM of high molecular weight and low filter coefficient are suggested in this paper and the best drying equipment is show to be of fiuidised bed type.