亲CO2聚醋酸乙烯基聚合物的设计与合成

发布时间：2018-03-07 08:25

本文选题：亲CO_2　切入点：浊点　出处：《华东理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：利用超临界CO2提高原油采收率技术可实现CO2减排和利用的双赢。但由于油藏条件下CO2与原油的粘度比过低,极易造成CO2在油藏中的粘性指进,导致石油采收率降低。增稠剂的使用可以有效增大CO2流体的粘度,提高石油采收率,具有很高的研究价值。然而CO2对极性物质以及高分子量聚合物的弱溶解性大大限制了增稠剂的使用。本文以RAFT自由基共聚的方法合成一系列醋酸乙烯酯-烷基乙烯基醚的共聚物(PVAc-co-PAVE),并测定了其在CO2中的浊点压力,从中筛选出在CO2中具有较好溶解能力的聚合物PVAc-co-PVEE。通过与量子力学从头算以及分子动力学模拟结果的比较,明确了影响聚合物在CO2中溶解性能的关键因素。另外,本文采用了一种新的合成方案(醇解-酰化法)制备含氟亲CO2物质醋酸乙烯酯-三氟醋酸乙烯酯共聚物(PVAc-co-PVTFAc),与文献中的RAFT自由基共聚法相比,该合成方案成本较低,且能更有效地控制产物分子量及其结构。
[Abstract]:Using supercritical CO2 to improve oil recovery can realize the win-win of CO2 emission reduction and utilization. However, because the viscosity ratio of CO2 to crude oil is too low under reservoir conditions, it is easy to cause the viscosity of CO2 in the reservoir. The use of thickener can effectively increase the viscosity of CO2 fluid and increase oil recovery. However, the weak solubility of CO2 to polar substances and high molecular weight polymers has greatly limited the use of thickeners. A series of vinyl acetate alkyl ethylates were synthesized by RAFT radical copolymerization. The copolymers of alkenyl ethers, PVAc-co-PAVEV, were used to determine the cloud point pressure in CO2. Polymers PVAc-co-PVEEE with good solubility in CO2 were selected. The key factors affecting the solubility of PVAc-co-PVEE in CO2 were identified by comparing with the ab initio calculations and molecular dynamics simulation results of quantum mechanics. In addition, a new synthesis scheme (alcoholysis acylation method) was used to prepare the fluorophile CO2 copolymer PVAc-co-PVTFAcC. Compared with the RAFT radical copolymerization method in the literature, the cost of the scheme is lower. The molecular weight and structure of the product can be controlled more effectively.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE39;TQ316.322

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