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Investigations into the Chemical Modification of Polyolefin Surfaces by Radical Reactions during Molding
Author(s) -
Nagel Jürgen,
Brunotte René,
Hupfer Bernd,
Grundke Karina,
Lehmann Dieter,
Mennig Günter
Publication year - 2007
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.200700009
Subject(s) - polyolefin , potassium persulfate , molding (decorative) , polymer chemistry , materials science , surface modification , macromolecule , chemical engineering , polymer , chemistry , composite material , polymerization , biochemistry , layer (electronics) , engineering
The surfaces of polyolefin parts are usually modified by separate processing steps. In this paper, we investigate how an in situ surface modification of polyolefins could be realized during molding, based on radical reactions, by which a macromolecule with functional groups is grafted to the polyolefin surface. The temperature of the melt is used to initialize the reactions. The different steps of the radical reaction chain were analyzed using model reactions. A modifier composition consisting of dibenzoylperoxide, potassium persulfate and poly(vinyl alcohol) revealed to be suitable. This composition was used for injection molding experiments. The bondability of the injection molded parts was largely enhanced.