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Improved cathodic disbondment performance of polyethylene blends

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journal contribution
posted on 01.04.2002, 00:00 authored by D Roy, G Simon, Maria ForsythMaria Forsyth
Cathodic disbondment (CD) performance of a range of modified polyethylenes (PE) compression molded on to steel plates at 320[degrees]C is reported. Adhesion strength was measured by the 90[degrees] 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.

History

Journal

Polymer engineering and science

Volume

42

Issue

4

Pagination

781 - 789

Publisher

Society of Plastics Engineers

Location

Stamford, Conn.

ISSN

0032-3888

eISSN

1548-2634

Language

eng

Notes

Reproduced with the kind permission of the copyright owner

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2002, Society of Plastics Engineers