Development and measurement of stress in polymer coatings

This paper reviews stress development mechanisms and stress measurement techniques for polymer coatings. Most polymeric coatings shrink during and after solidification due to chemical reaction, solvent evaporation, phase separation, or some combination thereof. Coating adhesion, however, prevents sh...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2002-11, Vol.37 (22), p.4717-4731
Main Authors: FRANCIS, L. F, MCCORMICK, A. V, VAESSEN, D. M, PAYNE, J. A
Format: Article
Language:English
Subjects:
Applied sciences
Chain dynamics
Chemical reactions
Coatings. Paints, varnishes and inks
Cracks
Exact sciences and technology
Film formation and curing, properties, testing
Materials science
Materials selection
Measurement methods
Measurement techniques
Molecular motion
Optimization
Organic chemistry
Phase separation
Polymer coatings
Polymer industry, paints, wood
Polymers
Shrinkage
Solidification
Stress measurement
Stress relaxation
Tensile stress
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper reviews stress development mechanisms and stress measurement techniques for polymer coatings. Most polymeric coatings shrink during and after solidification due to chemical reaction, solvent evaporation, phase separation, or some combination thereof. Coating adhesion, however, prevents shrinkage from occurring freely; this frustration of in-plane shrinkage leads to a tensile stress in the plane of the coating. At the same time, stress accumulates, it may be relaxed by processes such as molecular motion. The measured stress at any time is the result of the competition between stress buildup from frustrated shrinkage and stress relief from relaxation. Accumulation of stress is a problem because it can lead to defects such as cracks. An understanding of stress development in various types of polymeric coating systems will lead to strategies for material selection, process optimization, and defect elimination. In this paper, background on stress development is provided, followed by an overview of stress measurement methods for polymer coatings. The remainder of the paper focuses on stress development during the drying and curing of polymer coatings, drawing many examples from previous stress measurement studies.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1020886802632