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采用氧化还原体系合成羟乙基纤维素-丙烯酰胺(HEC-AM)接枝聚合物,利用旋转黏度计对接枝聚合物溶液的增黏性、耐热性、耐盐性等进行测定。结果表明:在所测试的聚合物质量分数(W)范围内,HEC-AM的增黏性要高于纯的聚丙烯酰胺(PAM);当W(HEC-AM)大于0.8%后,HEC-AM的黏度增长迅速。在同一温度下,HEC-AM溶液黏度均较PAM溶液高,当温度升至80℃时,HEC-AM的黏度保留率为54.4%,PAM的为28%;在80℃下老化5 d后,HEC-AM的黏度保留率为53.3%,PAM为22.7%,HEC-AM比PAM具有更好的耐热性和热稳定性。盐溶液的质量浓度提高,HEC-AM和PAM的黏度均降低,但HEC-AM的耐盐性较PAM好;并且在较高温度下,HEC-AM表现出较好的耐盐性。
The hydroxyethylcellulose-acrylamide (HEC-AM) graft polymer was synthesized by redox system. The viscosity, heat resistance and salt tolerance of the graft polymer solution were measured by rotary viscometer. The results showed that the viscosity of HEC-AM was higher than pure polyacrylamide (PAM) within the range of the mass fraction of polymer (W) tested. When W (HEC-AM) AM viscosity increases rapidly. The viscosity of HEC-AM solution was higher than that of PAM solution at the same temperature. The viscosity retention of HEC-AM was 54.4% and PAM was 28% when the temperature was raised to 80 ℃. After aging at 80 ℃ for 5 days, HEC-AM viscosity retention rate of 53.3%, PAM was 22.7%, HEC-AM than PAM has better heat resistance and thermal stability. The salt solution concentration increased, the viscosity of HEC-AM and PAM decreased, but the salt tolerance of HEC-AM was better than that of PAM. HEC-AM showed better salt tolerance at higher temperature.