交联聚合物溶液的热稳定性  

THERMAL STABILITY OF LINKED POLYMER SOLUTION

作　　者：林梅钦[1] 王兆军[1] 李明远[1] 郭继香[1] 吴肇亮[1] 

机构地区：[1]中国石油大学提高采收率研究中心,北京102249

出　　处：《石油学报（石油加工）》2008年第1期112-116,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油大学重质油国家重点实验室开放基金(200409)资助

摘　　要：采用黏度法、核孔膜过滤和动态光散射(DLS)法,研究了高相对分子质量、低浓度的部分水解聚丙烯酰胺(HPAM)与柠檬酸铝(AlCit)反应所形成的交联聚合物溶液(LPS)的热稳定性、HPAM降解后与AlCit反应所形成的体系的封堵性能及降解机理。结果表明,在较低温度下(40～60℃),HPAM与AlCit反应所形成的LPS能够长时间地稳定存在,对1.2μm的核孔膜有很好的封堵效果。而在较高温度下(70～110℃),所形成的LPS很快降解,不能对核孔膜形成有效封堵;温度越高,降解速率越快,对核孔膜的封堵性能越差。LPS高温降解后封堵性能下降的原因是LPS中交联聚合物线团(LPC)尺寸变小,平均表观流体力学半径从降解前的292nm减小到39.9nm左右。HPAM高温降解后与AlCit反应所形成的交联体系不能对1.2μm的核孔膜产生有效封堵。The thermal stability of the linked polymer solution （LPS） formed by low concentration partially hydrolyzed polyacrylamide （HPAM） with high molecular mass and aluminum citrate （AlCit）, and the plugging performance and degradation mechanism of the LPS formed by degraded HPAM and AlCit were investigated by viscometer, nuclear pore membrane and dynamic light scattering method. The results indicated that the LPS formed by HPAM and AlCit could keep its stability for a long time with better plugging efficiency in 1.2 μm nuclear pore membrane at lower temperature（40- 60℃）, while at higher temperature（70- 110℃） the LPS degraded faster and was unable to plug the 1. 2 μm nuclear pore membrane. The higher the temperature, the faster the degradation rate and the weaker the plugging efficiency of the LPS. The reason for the decrease of plugging efficiency of degraded LPS was that the size of the linked poiymer coils （LPC） in degraded LPS became smaller, its average hydrodynamic radius decreased rapidly from 292 nm before degradation to 39. 9 nm after degradation. The LPS formed by degraded HPAM and AlCit was unable to plug the 1.2 μm nuclear pore membrane.

关 键 词：部分水解聚丙烯酰胺(HPAM) 柠檬酸铝(AlCit) 交联聚合物溶液(LPS) 交联聚合物线团(LPC) 降解 

分 类 号：O631.4[理学—高分子化学]