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Endgroup-surface interaction

Endbead density profiles for functional and nonfunctional PFPEs were examined by Guo et al. (2003). Figure 28a shows the endbead density profiles of single component PFPEs as a function of the bead and surface interaction strength w in Equation (41) and endgroup functionality b and 8 in Equations (42) and (43). For nonfunctional... [Pg.106]

The interaction between PFPEs and disk overcoat is another significant factor to affect the properties of lubricant films. PFPEs with functional endgroups (e.g., Zdol and Ztetraol) perform better than PFPEs with nonfunctional endgroup (e.g., Z03) for retention and evaporation at the expense of the surface mobility or replenishment ability. However, strong endgroup functionality can lead to the layering and instability (e.g., surface nonuniformity/dewetting) of PFPE films (Karis... [Pg.71]

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Interacting Surface

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