Abstract
Modulated differential scanning calorimetry has been used to quantify the glass transitions of small, adsorbed amounts of poly (methyl methacrylate) (PMMA) on silica. While a relatively narrow, single glass transition was found for bulk PMMA, broader two-component transitions were found for the adsorbed polymer. a two-state model based on loosely bound polymer (glass transition similar to bulk) and more tightly bound polymer (glass transition centered around 156°C) was used to interpret the thermograms. on the basis of this model, the amount of tightly bound polymer was found to be approximately 1.3 mg/m 2, corresponding to a 1.1 nm thick layer. the change in heat capacity for the tightly bound polymer at the glass transition temperature was estimated to be about 16% of that of the bulk polymer. © 2006 American Chemical Society.
Recommended Citation
F. D. Blum et al., "Thermal Analysis of Adsorbed Poly(Methyl Methacrylate) on Silica," Langmuir, vol. 22, no. 10, pp. 4741 - 4744, American Chemical Society, May 2006.
The definitive version is available at https://doi.org/10.1021/la053098+
Department(s)
Chemistry
Second Department
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
0743-7463
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Publication Date
09 May 2006
