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Dissolution rates for thin films of miscible polymer blends

✍ Scribed by Ferdinand Rodriguez; Patrick D. Killian

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
209 KB
Volume
66
Category
Article
ISSN
0021-8995

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✦ Synopsis

The dissolution rates of thin polymer films were measured and compared. Mixtures of various ratios of poly(methyl methacrylate), PMMA, and poly( p-hydroxystyrene), PPHS, were dissolved in methyl isobutyl ketone, MIBK. The polymer solutions were then spun into thin films on silicon wafers and dried. The coated wafers were immersed in an MIBK bath and the rate of dissolution was observed using laser interferometry. The results show that pure PPHS films have dissolution rates 1000 times greater than films of pure PMMA at comparable molecular weights. However, for films containing both PPHS and PMMA, a minimum dissolution rate occurs for a mixture with about 20% (by weight) PPHS.

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