Thermal Analysis of Adsorbed Poly(methyl methacrylate) on Silica

Langmuir : the ACS Journal of Surfaces and Colloids
Frank D BlumOliver C Sitton

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 degrees 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/m2, 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.

References

Oct 4, 2003·Physical Review Letters·Mikhail Yu EfremovLeslie H Allen
Mar 10, 2004·The European Physical Journal. E, Soft Matter·K Fukao

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Citations

Sep 1, 2006·The Journal of Chemical Physics·Burak Metin, Frank D Blum
Sep 24, 2015·Journal of Colloid and Interface Science·Tan ZhangFrank D Blum
Mar 1, 2019·Soft Matter·Md Abdul SattarArchita Patnaik
Dec 13, 2017·Soft Matter·Subeen KimSiyoung Q Choi
Jun 28, 2020·Journal of Colloid and Interface Science·Gregory N SmithJames E Hallett
Jan 29, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Rajesh Raman Madathingal, Stephanie L Wunder
Dec 3, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Burak Metin, Frank D Blum
Aug 6, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Tsukasa MiyazakiHiroyuki Aoki
Aug 14, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Bal K Khatiwada, Frank D Blum

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