Hydrogen response in liquid propylene polymerization: Towards a generalized model

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Al-haj Ali, M. and Betlem, B. and Roffel, B. and Weickert, G. (2006) Hydrogen response in liquid propylene polymerization: Towards a generalized model. AIChE Journal, 52 (5). pp. 1866-1876. ISSN 0001-1541

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Abstract:Liquid propylene batch experiments in the absence of a gas phase have been carried out using a highly-active MgCl2/TiCl4/phthalate/silane/AlR3 catalyst at varying temperatures (60-80°C) and molar hydrogen-monomer ratios of 0-10 mmol/mol. With increasing hydrogen concentration the: 1. polymerization rate increases rapidly, reaching a constant value at concentrations above 1.4 mmol/mol; 2. pseudo-first-order catalyst deactivation constant increases; 3. molecular weight decreases; 4. polydispersity decreases slightly; but average molecular weight and polydispersity increase with increasing temperature. Polymerization rate, deactivation constant, and average molecular weight can be modeled based on a consistent dormant site mechanism assuming an (averaged) quasi-single-site model.
Item Type:Article
Copyright:© 2006 Elsevier Science
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/67301
Official URL:http://dx.doi.org/10.1002/aic.10783
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