Coating composition and fiber lifetime

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Abstract
The influence of the chemical environment on the lifetime of fiber with a standard polymer coating is studied with fatigue tests. Tests were performed in ambient air, water, ammonia, acidic and basic solutions. The diffusion of reactive components in the coating material appeared to be of considerable importance for the measured lifetime. Small amounts (2 wt%) of additives (acids, amines) were used in the standard coating material. Various additives are shown in fatigue tests to have a large negative influence on the lifetime of the fiber. One additive has a large positive influence. Possible mechanisms are discussed.

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