Abstract

Comparative studies (gel permeation chromatography and evaluation of turbulent drag reduction effectiveness on a turbulence rheometer) of ultra-high molecular weight polymers from a series of higher alpha-olefins (hexene, octene, decene, dodecene) used as hydrodynamic drag agents have been carried out. It was found that the activity of hexene in the polymerization on a titanium magnesium catalyst, if all other relevant factors remain unaltered, significantly exceeds the activity of octene, decene, and dodecene (the conversion of hexene in 24 h is almost 1.5 times higher than the conversion of other monomers over the same time), and the rates of polymerization of the latter differ slightly. The average molecular weights of all polymers differ only slightly: ~6 millions Da for polyhexene and ~5 millions Da for all the others. At the same time, the drag reduction effectiveness of the polymers showed a significant dependence on the nature of the initial monomers: the drag reduction effectiveness rapidly diminishes with an increase in the molecular weight of the corresponding alpha-olefin (3–4 times upon transition from polyhexene to polydodecene).

中文翻译：

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高烯烃单体（己烯，辛烯，癸烯，十二碳烯）聚合物在生产用于输送液态烃的流体动力减阻剂中的湍流减阻效果的比较

摘要

已进行了一系列用作水动力阻力剂的高级高分子量聚合物（链烯，辛烯，癸烯，十二碳烯）的超高分子量聚合物的比较研究（凝胶渗透色谱法和在湍流流变仪上评估湍流减阻效果）。出来。发现在所有其他相关因素保持不变的情况下，己烯在钛镁催化剂上聚合的活性大大超过了辛烯，癸烯和十二碳烯的活性（24小时内己烯的转化率几乎是辛烯，癸烯和十二烯的转化率的1.5倍）。 （同一时间其他单体的转化率）和后者的聚合速率略有不同。所有聚合物的平均分子量仅略有不同：聚己烯约为600万道尔顿，所有其他聚合物约为500万道尔顿。同时，