石油化工2011，Vol.40Issue(9)：963-967,5.
聚对苯二甲酸乙二醇酯切片溶胀聚合过程的模拟
Simulation of Swollen-State Polymerization Process of Poly ( Ethylene Terephthalate) Chips
张军 1沈希军 2张建 2梁玮 2冯连芳1
作者信息
- 1. 浙江大学化学工程与生物工程学系化学工程联合国家重点实验室,浙江 杭州 310027
- 2. 中国石化仪征化纤股份有限公司,江苏 仪征 211900
- 折叠
摘要
Abstract
Considering polycondensation,degradation and vinyl end group polycondensation, a poly (ethylene terephthalate) (PET) particle diffusion model was set up and used to simulate swollen-state polymerization (SwSP) of PET chips in tetradecane and their solid state polymerization ( SSP) in nitrogen. The experimental and simulative results showed that both SwSP and SSP processes for preparation of high relative molecular mass PET indicated similar polymerization rule that the intrinsic viscosity of the produced PET increased with increasing reaction time and temperature. The rate constants of the polycondensation and the vinyl end group polycondensation (kp and kt) are larger during SwSP than those during SSP, while the degradation rate constant(Jkd) during SwSP is lower. The diffusion coefficient(DEG) for SwSP is greater than that for SSP due to the honeycomb formation of the PET produced by SwSP. The factors of kp, kt, kd and DEG make the reaction rate increase in SwSP.关键词
聚对苯二甲酸乙二醇酯/溶胀聚合/固相聚合/模拟Key words
poly (ethylene terephthalate)/ swollen-state polymerization/ solid state polymerization/ simulation分类
化学化工引用本文复制引用
张军,沈希军,张建,梁玮,冯连芳..聚对苯二甲酸乙二醇酯切片溶胀聚合过程的模拟[J].石油化工,2011,40(9):963-967,5.
