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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents



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ID: 56360.0, MPI für Polymerforschung / MPI Polymerforschung
Organic nanoparticles with polypropyleneoxide chains as support for metallocene catalysts: Influence of the concentration of PPO chains on the surface of nanoparticles on the catalyst activity in ethylene polymerization
Authors:Jang, Y. J.; Nenov, N.; Klapper, Markus; Müllen, Klaus
Language:English
Date of Publication (YYYY-MM-DD):2003-07
Title of Journal:Polymer Bulletin
Journal Abbrev.:Polym. Bull.
Volume:50
Issue / Number:5-6
Start Page:351
End Page:358
Review Status:not specified
Audience:Not Specified
Abstract / Description:In this paper the influence of the surface of organic nanoparticles used as supports in metallocene catalysed olefin polymerization is investigated. Several latex particles with different amounts of polypropylene oxide (PPO) chains on the surface were synthesized by miniemulsion polymerization and used as supports for the Me2Si(2MeBenzInd)(2)ZrCl2/MAO complex. These catalysts were applied in heterogeneous ethylene polymerization. It was observed that longer PPO chains on the supports coordinated more metal sites than shorter ones to give catalysts with higher activities. An increased amount of PPO chains on the supports, however, led to catalysts with lower activities. It is suggested that a higher amount of PPO chains on the support could result in a stronger network between the different nanoparticles due to the enhanced interaction of the PPO, with the methylaluminoxanes so that the diffusion of the ethylene monomer to the active metal sites is hindered.
Comment of the Author/Creator:Date: 2003, JUL
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
Identifiers:ISI:000184686600008 [ID No:1]
ISSN:0170-0839 [ID No:2]
LOCALID:P-03-151
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