Thermogravimetric Study of Ultrathin PMMA Films on Silica: Effect of Tacticity
Abstract
The degradation of isotactic and syndiotactic poly(methyl methacrylate) (PMMA) was studied by thermogravimetric analysis (TGA) with an emphasis on their behavior in ultrathin films on silica. Both PMMA tacticity and adsorbed amounts were found to affect the degradation. In bulk, syndiotactic PMMA (syn-PMMA) has higher thermal stability than isotactic PMMA (iso-PMMA) due to its lower chain mobility. The Tmax (maximum rate decomposition temperature) is lower than that of bulk samples at higher adsorbed amounts for both iso- and syn-PMMA. Tmax increases when the adsorbed amount on the silica surface decreases for syn-PMMA. The degradation behavior of adsorbed iso-PMMA became very complex at low adsorbed amounts.
Recommended Citation
B. Zhang and F. D. Blum, "Thermogravimetric Study of Ultrathin PMMA Films on Silica: Effect of Tacticity," Thermochimica Acta, Elsevier, Feb 2003.
The definitive version is available at https://doi.org/10.1016/S0040-6031(02)00518-X
Department(s)
Chemistry
Sponsor(s)
National Science Foundation (U.S.)
Keywords and Phrases
Adsorption; Polymethylmethacrylate
International Standard Serial Number (ISSN)
0040-6031
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2003 Elsevier, All rights reserved.
Publication Date
01 Feb 2003
