Issue 22, 1993

Problem of measuring steric interaction forces between surfaces bearing adsorbed layers of macromolecules in good solvents

Abstract

Several new techniques based on the use of a magnetoelectric dynamometer are described. The dynamometer can be used to measure an adhesion force f*a(with a precision of ±5 nN) between two fluid particles (heptane drops or air bubbles) or radius R≈ 1 mm and between two curved mica sheets in polymer solutions, as well as a thinning rate dHf/dt of microscopic liquid films between two mica surfaces and two liquid particles bearing a load of a constant joining force fp in a film thickness range Hf≲ 1 µm.

Use was made of poly(vinyl alcohol)(PVA), poly(acrylic acid)(PAA) and acrylic acid–vinyl acetate copolymers (CP) in aqueous electrolyte solutions which are good solvents for these polymers.

Attention was paid to the problem of measurement of adhesion forces between surfaces bearing adsorption layers of polymers in good solvents, in order to explain a possible evolution of the system of two interacting adsorption layers from ‘restricted’ to ‘full’ equilibrium during a pull-off process.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans., 1993,89, 4059-4068

Problem of measuring steric interaction forces between surfaces bearing adsorbed layers of macromolecules in good solvents

V. G. Babak, J. Chem. Soc., Faraday Trans., 1993, 89, 4059 DOI: 10.1039/FT9938904059

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements