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Improved cathodic disbondment performance of polyethylene blends
Author(s) -
Roy Debashis,
Simon George P.,
Forsyth Maria
Publication year - 2002
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10990
Subject(s) - materials science , polyethylene , adhesion , composite material , talc , coating , cathodic protection , polarity (international relations) , polymer , epoxy , electrochemistry , electrode , chemistry , biochemistry , cell
Abstract Cathodic disbondment (CD) performance of a range of modified polyethylenes (PE) compression molded on to steel plates at 320°C is reported. Adhesion strength was measured by the 90° peel test and good dry adhesion strength was obtained for all modified polyethylene materials and blends, as well as for the neat polymer. It is shown that dry bond strength does not correlate with CD performance. Initial results of wet peel tests of samples in various concentrations of NaOH are presented where it is observed that for samples with improved wet adhesion strength, CD performance was also improved. Surface polarity was determined from contact angle measurements, and it is shown that increased surface polarity of the coating was not the only determinant for improved CD performance. Inorganic fillers such as talc were also found to improve CD performance by changing the bulk properties, with little measurable change in polarity. Some mechanistic aspects of CD performance are also discussed.