【作者】 樊丽萍；

【导师】 赵林；

【作者基本信息】 天津大学 ， 化学工程， 2004， 硕士

【摘要】 本文根据分子设计原理，采用自由基胶束共聚法合成了含有-CONH2、-NH-、 N-SO3 、-CHCONH2 等极性基团，和疏水基团CH3 - CH3的丙烯酰胺（AM）、N,N-二甲基丙烯酰胺（DMAM）和 2-丙烯酰胺基-2-甲基丙磺酸（AMPS）的三元共聚物PADS。通过单一实验和正交实验综合确定了最佳合成条件。采用红外光谱、元素分析和热失重分析了所合成的 PADS 的结构和热稳定性，分析得知三种单体单元合成了所设计的共聚物，同时由于在分子链中引入了结构较为稳定的磺酸基，大大提高了共聚物的热稳定性能。 讨论了单体总浓度、疏水单体和离子性单体等反应条件对共聚物溶液粘度的影响，研究表明这些反应条件的用量对共聚物性能的影响都有一最佳值，过高和过低对其溶液性能不利。研究了共聚物溶液浓度、小分子电解质、剪切速率和时间温度等测试条件对共聚物溶液性能的影响，结果表明共聚物具有很好的抗盐、抗剪切和耐温的性能，能够达到聚合物驱采的要求。 对表面活性剂影响共聚物溶液的研究发现：表面活性剂的加入一方面是干扰了聚合物分子间的缔合作用，另一方面是增加了共聚物分子之间的静电排斥作用，导致其粘度降低。采用扫描电子显微镜和原子力显微镜加入表面活性剂前后的共聚物溶液进行观察，对其微观结构进行了初步探索。 对共聚物 PADS 的稀溶液进行测定并采用 Huggins 方程进行数据拟合，以了解共聚物分子形态和分子中各基团间的相互作用。比较本文所合成共聚物与大庆样品随盐水浓度变化的趋势，结果表明本文所合成的共聚物虽然在较低盐水浓度下不如大庆样品，但是高盐水浓度下具有更大的优势。更多还原

【Abstract】 In the present study, a work was done on the design of the copolymer structureand the synthesis of copolymers (PADS series) of acrylamide (AM),2-acrylamido-2-methylpropanesulfonic acid (AMPS) and N,N-dimethylacrylamide(DMAM) by free radical micellar copolymerization. The optimum condition wasattained by the method of onefold and orthogonal test. Polymer structure and thermalstability was characterized by FTIR, element analysis and thermogrammetric analysis.It was proved that the copolymers were the objective and had good thermal stabilitywhich was attributed to introduce the stable sulfonic function. The effect of total concentration of monomers, the amount of DMAM andAMPS，the concentration of copolymers, small molecule electrolyte, shear rate andtime and temperature which affect the viscosity behavior of tripolymers was discussed.It was proved that there had an an optimum amount of total monomers concentration,DMAM and AMPS and copolymers had good salt, shear and temperature resistance,which could be used in polymer flooding. It was found from the effect of SDS that SDS interfered with the assosiative ofpolymer intermolecules and increased the electrostatic exclude which deduced thedecrease of viscosity of polymers. SEM and AFM were adopted to observe thesolution without and with SDS in order to explore the solution microstructure. The properties of dilute solution of copolymers were tested in order tounderstand the molecule morphology and the interaction of functions in molecules.The samples of Daqing and PADS as a function of salt concentration were compared.It was clear that PADS had more potential at high salt concentration though it was notgood as the samples of Daqing at low salt concentration.更多还原