Wednesday, 13 October 2004 - 1:00 PM

This presentation is part of : Mechanics and Thermodynamics of Polymers

Nanomechanical Measurements on Polymer Thin Films and Surfaces

Gregory B. McKenna, Paul A. O'Connell, and Stephen A. Hutcheson. Texas Tech University, Department of Chemical Engineering, 8th St. and Canton Ave., Lubbock, TX 79409-3121

We report results of measurements from a novel nano-bubble inflation technique that permits absolute compliance measurements on ultra thin (< 40 nm) polymer films both near to and below the nominal film glass transition. These are “free-standing” but laterally constrained films. We have also solved the viscoelastic equations for the settling of balls into polymer surfaces. Upon including a surface energy term, we find that the absolute creep compliance is obtained and is in agreement with the conjecture that the polymer surface does not exhibit liquid-like properties until the material is above the glass transition temperature of the bulk material.

Back to Mechanics and Thermodynamics of Polymers
Back to SES Abstracts

Back to The 41st Annual SES Technical Meeting