在模拟工业流程的连续小试装置上进行了丙烯腈和醋酸乙烯酯的水相沉淀共聚合在线研究。考察了连续小试装置的操作特征等。通过聚合体系pH值和聚合温度实时反馈控制技术,即时分析聚合过程特征,发现体系pH值是最敏感的操作参数,而且响应灵敏和精确,能及时提供一些非稳定聚合状态的信息。 An online study of aqueous precipitation copolymerization of acrylonitrile and vinyl acetate was performed on a continuous pilot plant simulating industrial processes. The operation characteristics of continuous small test equipment were investigated. Through the real-time feedback control technology of pH value and polymerization temperature of polymerization system, the characteristic of polymerization process was analyzed instantly. The pH value of system was the most sensitive operating parameter. And the response was sensitive and accurate, which could provide some information of unstable polymerization state in time.