石油减阻聚合物相对分子质量及其分布对其性能的影响

实验采用复配Cp2ZrCl2/Ziegler-Natta催化剂,以本体聚合法制备了系列具有超高相对分子质量的油溶性聚合物。采用凝胶渗透色谱表征聚合物相对分子质量及其分布,并考察了其对聚合物溶液特性粘度的影响。结果表明,当减阻聚合物的相对分子质量达到某一定值时,聚合物的多分散指数对其减阻效果有明显影响;仅通过提高聚合物的相对分子质量来改善其减阻性能,也许并不是行之有效的方法。研究初步认为,高效的减阻聚合物不仅要具备超高相对分子质量,还应有超高的相对分子质量分布。

Effect of relative molecular mass of drag reduction polymer and its distribution on performance

A series of oil-soluble polymers with ultrahigh relative molecular mass were synthesized by bulk polymerization utilizing Cp2ZrCl2/Ziegler-Natta as catalyst.The relative molecular mass of polymer and its distribution were characterized by GPC.Influences of relative molecular mass of polymer and its distribution on limiting viscosity had been researched.The results showed when frictional reducing polymer’s relative molecular mass arrives at a certain value,the effect of drag reduction mostly depends on polymeric polydispersity index;enhancing polymeric drag reduction performance via only increasing polymeric relative molecular mass is not an effective method.The high-efficient drag reduction polymers have not only more relative molecular mass,but also wider relative molecular mass distribution.