Hydrogen response in liquid propylene polymerization: Towards a generalized model
作者： M. Al-haj Ali , B. Betlem , B. Roffel , G. Weickert
DOI: 10.1002/AIC.10783
关键词: Polymerization 、 Polymer chemistry 、 Constant (mathematics) 、 Hydrogen 、 Molar mass distribution 、 Silane 、 Catalysis 、 Chemistry 、 Analytical chemistry 、 Dispersity 、 Kinetics
摘要: Liquid propylene batch experiments in the absence of a gas phase have been carried out using highly-active MgCl2/TiCl4/phthalate/silane/AlR3 catalyst at varying temperatures (60-80°C) and molar hydrogen-monomer ratios 0-10 mmol/mol. With increasing hydrogen concentration the: 1. polymerization rate increases rapidly, reaching constant value concentrations above 1.4 mmol/mol; 2. pseudo-first-order deactivation increases; 3. molecular weight decreases; 4. polydispersity decreases slightly; but average increase with temperature. Polymerization rate, constant, can be modeled based on consistent dormant site mechanism assuming an (averaged) quasi-single-site model.
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