论文部分内容阅读
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。
In the experiment, a series of oil-soluble polymers with ultra-high relative molecular mass were prepared by bulk polymerization using Cp2ZrCl2 / Ziegler-Natta complex catalyst. Gel permeation chromatography (GPC) was used to characterize the relative molecular mass of the polymer and its distribution. The effect of its molecular weight on the intrinsic viscosity of the polymer solution was also investigated. The results show that when the relative molecular mass of the drag reducing polymer reaches a certain value, the polydispersity index of the polymer has a significant effect on the drag reducing effect; only improving the drag reducing property of the polymer by improving the relative molecular mass of the polymer may, Is not an effective method. Preliminary studies believe that efficient drag reduction polymers not only have to have ultra-high molecular weight, but also the ultra-high relative molecular mass distribution.