污水中的硫离子导致配制聚合物溶液黏度损失严重,影响驱油效果。为明确硫离子导致聚合物黏度降低的机制,防止聚合物黏度损失,实验研究不同质量浓度硫离子对聚合物黏度的影响以及可逆性,利用扫描电镜观察降黏前后聚合物微观形貌,利用凝胶色谱-示差折光检测器分析降黏前后聚合物相对分子质量分布,并利用量子化学和分子动力学方法探讨硫化物对聚合物的断链、卷曲作用机制。结果表明：7 mg/L的S2-能使1.7 g/L聚合物溶液黏度损失超过80%；聚合物的重均相对分子质量和均方回转半径分别由降解前的3.677×106 g/mol、191.7 nm降低为1.277×106 g/mol、91.4 nm,相对分子质量分布变宽,聚合物分子尺寸变小；导致聚合物黏度降低的主要原因是S2-引发自由基链式反应,聚合物断链,同时,S2-引起聚合物分子链收缩、卷曲,网状结构被破坏。%Sulfur ion in the waste water leads to the viscosity loss of polymer solution significantly, which reduces the oil dis-placement efficiency. In order to uncover the mechanism of sulfur ion on reducing polymer viscosity and prevent viscosity loss of polymer solution, the effect of different concentrations of sulfur ion on the polymer viscosity and reversibility were investi-gated. Scanning electron microscopy ( SEM) was used to observe the polymer microstructure. GPC-refractive index detector was used to analyze the molecular weight distribution of the polymer, in which the quantum chemistry and molecular dynam-ics method were applied to study the break and coil of molecular chain of the polymer caused by sulfur ion. The results show that 7 mg/L sulfur ion can cause more than 80% loss of viscosity of 1. 7 g/L polymer solution. Weight average molecular weight and mean square radius of gyration drop down to 1. 277×106 g/mol and 91. 4 nm from 3. 677×106 g/mol and 191. 7 nm respectively. The molecular weight distribution is widened and the size of the polymer molecules is decreased. The main reason of polymer viscosity loss is the free radical chain reaction induced by sulfur ion, which causes the breakage of polymer chain. Also, sulfur ion causes coil and shrinkage of polymer molecular chain, which destroys the spatial network structure of macromolecules.
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机译：吸附阴离子对放射性硫35同位素阳极镍分解影响的研究。 Untersuchungen ueber den Einfluss adsorbierter anioner auf die anodische Nickelaufloesung Unter Verwendung des Radioisotops schwefel-35
