The Adsorbed Film Structure of End-Functionalized Poly (perfluoro-n-propylene oxide)

The D-4OH adsorbed film structure is investigated as a function of film thickness and of molecular weight via surface energy measurements, terraced flow profiles, and ellipsometric imaging for film dewetting. The D-4OH monolayer thickness on a carbon surface exhibited a power law dependence on molec...

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Bibliographic Details
Published inTribology Online Vol. 9; no. 3; pp. 113 - 120
Main Author Waltman, Robert
Format Journal Article
LanguageEnglish
Published Japanese Society of Tribologists 2014
Subjects
adsorbed film structure
disk lubricant
perfluoropolyether
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Summary:The D-4OH adsorbed film structure is investigated as a function of film thickness and of molecular weight via surface energy measurements, terraced flow profiles, and ellipsometric imaging for film dewetting. The D-4OH monolayer thickness on a carbon surface exhibited a power law dependence on molecular weight, where the exponent was determined to be 0.70. With decreasing film thickness, the in-plane component of the radius of gyration, normalized to the bulk radius of gyration, increased to ~ 1.5, consistent with an ellipsoidal conformation on the carbon surface. Confinement effects increased with increasing molecular weight.
ISSN:1881-2198
1881-2198
DOI:10.2474/trol.9.113