Glass and structural transitions measured at polymer surfaces on the nanoscale

Year: 2000

Authors: Overney R.M., Buenviaje C., Luginbühl R., Dinelli F.

Autors Affiliation: Department of Chemical Engineering, University of Washington, Box 351750, Seattle WA 98195-1750
University of Washington Engineered Biomaterials and Department of Bioengineering, University of Washington, Box 351750, Seattle, WA 98195-1750 USA

Abstract: This paper reviews our recent progress in determining the surface glass transition temperature, T-g, of free and substrate confined amorphous polymer films.
We will introduce novel instrumental approaches and discuss surface and bulk concepts of T-g. The T-g of surfaces will be compared to the bulk, and we will discuss the effect of interfacial interactions (confinements), surface energy, disentanglement, adhesion forces, viscosity and structural changes on the glass transition. Measurements have been conducted with scanning force microscopy in two different shear modes: dynamic friction force mode and locally static shear modulation mode. The applicability of these two nano-contact modes to T-g will be discussed.

Journal/Review: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

Volume: 59 (1-2)      Pages from: 205  to: 225

More Information: DMR96324235. EEC 9529161. State University of New York, SUNY. American Chemical Society, ACS. – This work was supported by the Shell Foundation’s Faculty Career Initiation Fund, and the NSF MRSEC (DMR96324235). Acknowledgment is made to the Donors of The Petroleum Research Fund, administered by the American Chemical Society, for partial support of this research. Reto Luginbühl was supported by the University of Washington Engineered Biomaterials (UWEB) program, a NSF ERC (EEC 9529161). The authors of this review paper would like to thank Robert Paugh from MMR Technology Inc. for instrumental support, and Miriam Rafailovich, Jonathan Sokolov, and Shouren Ge from the State University of New York at Stony Brook for taking part on the initiation of this research.
KeyWords: Atomic force microscopy (AFM), Confinement, Friction, Glass transition, Polymers, Scanning force microscopy (SFM), Scanning probe microscopy (SPM),
Shear modulation, Surface analysis, Surface interaction
DOI: 10.1023/A:1010196214867

Citations: 95
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