Chemical Seal: Chemical Compatibility
Elastomers can swell and/or degrade in chemical seal environments through reactions with the polymer backbone and cross-link system, or by reactions with the filler system. In the semiconductor industry, this degradation can be seen in increased contamination and reduced seal life.
Polymer Backbone and Cross-link:
Special Chemical Environments:
The most common measure of chemical compatibility for a chemical seal is volume swell. The following formula is used in reporting volume swell measurements. This takes into account dimensional changes in all three dimensions, and is more relevant than specific dimensional change readings for a chemical seal.
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