Department of Chemical Engineering, Tsinghua University
He yuhang
2019-now: Department of Chemical Engineering,Tsinghua University (PhD candidate). 2015-2019: School of Chemical Engineering, EastChina University of Science and Technology (Bachelor) Email: 1072345193@qq.com Project: Fundamental Research of Precise Synthesis of High BarrierEthylene-Vinyl Alcohol Copolymer 1.Living Cationic Polymerization ofIsobutylene in Seconds Based on Microflow System
An initiating system composed byethylaluminum sesquichloride (Et3Al2Cl3)/ /2,6-dimethylpyridine(DMP) is established for fast living cationic polymerization of isobutylene.The polymerization can be accelerated at utmost to finish in only 4 s withextremely narrow molecular weight distribution in microflow system. The effectof mixing intensity, solvent polarity and temperature is well investigated basedon microflow reactor. In addition, the two-stageeffect of DMP was revealed. 2.Microflow System for Controlled Synthesis ofEthylene-Vinyl Acetate Copolymers: Continuous Copolymerization and KineticStudy
A microflow system was designed to facilitate thesynthesis of EVA with controlled ethylene content. Continuous flow synthesis ofEVA by solution free radical copolymerization was realized homogeneously basedon this microflow system. By operating the microflow system in a stop-flowmethod, we developed a simple kinetic model of copolymerization and measuredthe reactivity ratios of ethylene and vinyl acetate copolymerization intert-butyl alcohol and dimethyl carbonate. 3.Alcoholysis of Ethylene-Vinyl AcetateCopolymer Catalyzed by Alkaline: A Kinetic Study Based on In Situ FTIRSpectroscopy
A new method was developed to study the alcoholysis ofEVA with 32 mol% ethylene content based on in situ FTIR spectroscopy. Thefeasibility and accuracy of this method was carefully studied. A kinetic modelfor predicting reaction rate was obtained using this method. The applicabilityof the kinetic model was further verified by performing flow alcoholysis inmicroflow reactor.
Publication [1] HeYH, Ke H, Lu YC*. Chemical Engineering Journal, 2023, 464, 142695 [2] HeYH, Zhang ZZ, Ke H, Lu YC*. Chemical Engineering Journal, 2023, 470, 143940 [3] HeYH, Lu YC*. European Polymer Journal, 2022, 174, 111335 [4] HeYH, Xie D, Lu YC*. Chinese Journal of Polymer Science, 2022, 401(8) [5] 何宇航，刘晴捷，吕阳成*.化工学报 2021, 72(2): 1001-1008 |
