Investigation of Water Absorption in Clay-Reinforced Polypropylene Composites

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DOIResolve DOI: http://doi.org/10.1016/j.polymdegradstab.2009.12.001
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TypeArticle
Journal titlePolymer Degradation and Stability
Volume95
Issue4
Pages429439; # of pages: 11
SubjectPolypropylene; Nanocomposite; Water absorption; Injection molding; Mechanical properties
AbstractThe behaviour of polypropylene nanocomposites containing different amounts of commercial nanoclay upon exposure to distilled water and sea water at different temperatures was investigated and compared with that of neat polypropylene. In the initial stages, the weight gain (moisture absorption) follows Fick's second law, but at longer times deviations are observed owing to physical degradation and in some cases a loss of mass. Distilled water diffuses more rapidly than sea water. As the nanoclay content increases, both the rate of moisture absorption and the maximum moisture content increase, owing to the hydrophilic nature of the nanoclay and the added compatibilizing agent. Although the moisture absorption decreases the flexural properties of both the nanocomposites and neat PP, because the unexposed (as-moulded) nanocomposites are significantly superior to the neat PP they remain so even after prolonged exposure.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number54326
NPARC number18487263
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Record identifier0d3e66dc-7e19-48b0-9bc0-0353d0f68b8b
Record created2011-10-11
Record modified2016-05-09
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