Synthesis And Application Of Anionic Polyacrylamide

With the fast development of agriculture and industry in China, Chinese people are living a better life. At the same time, the problem of China's water pollution are becoming more and more serious. It does great harm to China's economy. So we are taking great attention to use flocculant as the way to treat waste water.Because of it's excellent performance and low cost, anion polyacrylamide (APAM) are widely used in the domain of water treatment. Yet China's production technology of APAM are far behind other countries. The purpose of this thesis is to develop new synthesis technology that can produce APAM with good dissolving capacity and high molecular weight.To obtain APAM, there are several kinds of synthesis technology such as aqueous polymerization, emulsion polymerization, radiation-initiated polymerization, photo polymerization and deposition polymerization. The initiate system includes redox system, azo system and combined system. This thesis mainly includes the following:1. APAM was prepared by homopolymerization cohydrolysis of acrylamide. In this technology, acrylamide taken as monomer together with sodium carbonate is initiated by redox system. Several factors, such as temperature and time are considered which affect the relative molecule weight of polyacrylamide. The optimized reaction technical conditions are proposed.2. APAM was prepared by copolymerization of sodium acrylate (AANa) and acrylamide. In this way, we can got the product with given hydrolysis degree.3. Introduced the mechanism of polymerization and flocculation. The possible mechanism of additives were also discussed.4. APAM was used in treatment of chemical waste water with the comparison of other flocculant.