dc.contributor |
D'agosto, Franck and Boisson, Christophe |
dc.contributor.author |
Marín Càmara, Ariadna |
dc.date |
2010 |
dc.identifier.uri |
http://hdl.handle.net/2099.1/14676 |
dc.language.iso |
eng |
dc.publisher |
Universitat Politècnica de Catalunya |
dc.publisher |
Centre National de la Recherche Scientifique |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria química |
dc.subject |
Polymerization |
dc.subject |
Polyethylene |
dc.subject |
Ethylene |
dc.subject |
Polimerització |
dc.subject |
Polietilè |
dc.subject |
Etilè |
dc.title |
Ethylene polymerization and polyethylene functionalization |
dc.type |
info:eu-repo/semantics/bachelorThesis |
dc.description.abstract |
Polyolefins have become ubiquitous and are large volume commodity materials. Of current
interest is the preparation of speciality polymers incorporating polyethylene (PE), which often requires polymer chain-end manipulation. Ethylene polymerization by a neodymium catalyst in conjunction with n-butyloctylmagnesium (BOMg) is based on a reversible chain-transfer between Nd (where PE chains grow) and Mg (where PE chains rest). Using a large BOMg/Nd ratio for ethylene polymerization leads to magnesium-bound PE chains (PE-Mg-PE). We showed PE-Mg-PE is a precursor to end functionalized PE (PE-X) the potential
applications of which include the design of macromolecular architectures based on PE. A
drawback of the polymerization system is the optimum operating temperature (80°C) which is
sufficient to produce only low molecular weight PE. This study aims to develop a
polymerization system in which reversible chain transfer occurs at a high operating
temperature. A catalyst system based on a dichloro-iron(II)-2,8-bis(imino)quinoline complex, [(BIQ)FeCl2], is a suitable candidate due to i) satisfactory polymerization behaviour above 100°C when activated by methylaluminoxane (MAO) and ii) the potential for chain transfer with ZnEt2, established previously with Fe based catalysts. [(BIQ)FeCl2]) was assessed for
ethylene polymerization in the absence and in presence of ZnEt2. |
dc.description.abstract |
Outgoing |