Drying process in vapor swollen heterogels
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Date
2010
Authors
Pekcan, Mehmet Önder
Pekcan, Önder
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Volume Title
Publisher
Springer
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Abstract
Disk-shaped heterogels were prepared by combining methyl methacrylate (MMA) and styrene (S) with ethylene glycol dimethacrylate (EGDM) as a crosslinker agent in the presence of 22'-azobisisobutyronitrile (AIBN). Swelling experiments were performed under chloroform vapor and the swollen gels are then allowed to dry under room temperature. Gravimetric technique was used to study drying processes. It is observed that two different regimes are present in the drying processes of these heterogels. Fickian diffusion model was used to determine desorption coefficients for each drying step in both regimes. Desorption coefficients D (d) of heterogels were found to be strongly correlated with the mixture composition of polymeric materials in the heterogel system for both regimes. Heterogels with high S content dry much slower than the heterogels with low S content.
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Keywords
Drying, Desorption, Heterogels, Fickian diffusion
Turkish CoHE Thesis Center URL
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0
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N/A
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N/A
Source
Volume
64
Issue
7
Start Page
667
End Page
676