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Synthesis of a linear low‐density polyethylene/MgO@Mg(OH)2 nanocomposite using modified in situ polymerization |
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| Authors: | Sven Käselau Saskia Scheel Linnea Petersson Chau‐Hon Ho Gerrit A Luinstra |
| Affiliation: | 1. Institute for Technical and Macromolecular Chemistry, Department of Chemistry, University of Hamburg, Hamburg, Germany;2. ABB Schweiz, AG Corporate Research, Baden‐D?ttwil, Switzerland;3. ABB AB, Corporate Research, V?ster?s, Sweden |
| Abstract: | Composites of linear low‐density polyethylene were obtained in toluene slurry by in situ copolymerization of ethylene and 1‐octene in the presence of untreated magnesium oxide–hydroxide nanoparticles (MgO@Mg(OH)2) of ±50 nm and such treated with dibutylmagnesium (DBM) as support for a bis(n‐butylcyclopentadienyl)zirconium dichloride–methylaluminoxane (MAO) catalyst system. Treatment of the nanoparticles with DBM (0.5–6 mmol g?1 MgO@Mg(OH)2) allows one to decrease the amount of MAO by 1.2 mmol Al g?1 MgO@Mg(OH)2, while reaching the same average catalyst activity and a finer distribution of the particles. Energy‐dispersive X‐ray mapping shows that the MAO is mainly associated with the filler. The crystallinity of the matrix polymer decreases with filler content. © 2018 Society of Chemical Industry |
| Keywords: | nanocomposites polyethylene (PE) metallocene catalysts magnesium oxide in situ polymerization thermal analysis EDX analysis |