关键词: 聚酯, 逐步聚合, 流程模拟, 连续工艺, Aspen, 聚酯, 聚合, 流程模拟, 连续工艺, Aspen, 反应

Abstract: The step-growth polymerization of TPA and EG was studied with Aspen Polymer. The influences of feed ratio，pressure and temperature on polymerization were also analyzed with batch reactor block. The feed ratio from 1.2 to 2.0 was appropriate，low pressure and high temperature were beneficial to the reactions. But an overly low pressure led to more reaction time because of low reaction rate. On the other hand，high temperature resulted in more by-products. Thus the polymerization in a batch reactor was simulated with continuously dropping pressure from 0.001MPa to 0.2MPa and continuous climbing temperature from 260℃ to 285℃. On the basis of the result，a continuous production process was designed and optimized with the degree of polymerization reaching 121.1.

Key words: Polyester, Step growth, Simulation, Continuous Process, Aspen, polyester, polymerization, simulation, continuous process, Aspen, reaction