At Rocky Mountain Labs, Auger Electron Spectroscopy (AES) is employed to analyze surface chemistry of elastomeric materials with ultra-high spatial resolution and sensitivity. Elastomers, which are common in seals, gaskets, o-rings, and flexible molded components, most times fail or degrade as a result of surface contamination, oxidation, or bonding issues. AES supplies the surface-specific elemental information necessary to evaluate these materials and address key problems of adhesion, surface treatment, or foreign contamination.
Why Use AES for Elastomer Analysis?
Elastomers are sophisticated materials consisting of organic polymers and additives, fillers, and processing agents. The surface properties of an elastomer—cleanliness, oxidation state, and elemental composition—can greatly affect its performance at bonding, sealing, and exposure to harsh environments.
AES is particularly well adapted for elastomer analysis because it:
- Examines the outer 1–5 nanometers of a material—perfect for surface-sensitive analysis.
- Delivers elemental identification of contaminants, fillers, or additives.
Uses of AES for Elastomer Investigations
In Rocky Mountain Labs, AES is employed to answer a variety of surface chemistry issues involving elastomers:
- Failure analysis of adhesion, such as surface contamination or untreated surfaces before bonding or coating.
- Characterization of residual surface film, particularly post-processing agents or mold-release residues.
- Degradation studies, such as oxidation or migration of additives to the surface.
- Identification of contaminants, such as foreign metallic or inorganic particles trapped on the elastomer surface.
- Surface comparison, between failed and successful samples or before and after treating the surface.
These applications are especially valuable in applications where elastomers need to retain sealing integrity, bond to other substrates, or withstand environmental exposure.
Sample Preparation and Analytical Process
AES samples of elastomers need to be:
- Flat and dry, suitable for ultra-high vacuum (UHV) conditions.
- Solidly mounted, usually on conductive stubs or adhesive.
- Prepared for small-area analysis, targeted at particular areas of interest such as bonding surfaces or visible defects.
If depth analysis is required, AES can be coupled with argon ion sputtering to progressively remove surface layers and monitor elemental variation with depth—particularly valuable in layered coatings or in thin surface films.
Scope and Limitations
Though AES is great at picking up inorganic surface elements such as silicon, chlorine, sulfur, and calcium, it is less appropriate for detecting organic polymers or hydrocarbon structures. Base polymer identification or additive analysis is usually accomplished with FTIR spectroscopy combined.
Rocky Mountain Labs does not conduct AES analysis of forensic, environmental, or biomolecular samples. Our only pharmaceutical or food-related elastomer work is foreign material detection.
AES delivers unmatched surface sensitivity for the examination of elastomeric products, providing information on adhesion issues, surface degradation, and contamination. Whether you need to diagnose failures or verify surface treatments, Rocky Mountain Labs supplies high-resolution nanoscale AES information to assist in the assurance of elastomer component reliability and performance.
