Chemical Resistance of Glass Fiber Reinforced Plastics

4 Chemical Resistance of Glass Fiber Reinforced Plastics 5.5.8.4.1 Damage Caused by Penetrating Water 

However, two aspects have to be noted here. Damage based exclusively on activated diffusion can be prevented by diffusion barriers (e.g., film) or at least be significantly delayed in addition, the resins used are inherently diffusion resistant. Even simple standard UP resins reach near-saturation only after considerable time 

The influence of temperature on diffusivity varies for the second group. This somewhat sweeping categorization can be made for almost all UP resins. Structure, crosslinking density, and degree of curing could shift the boundaries. 

Leaching process initiated by a transverse crack in UP resin, 1n-H2SO with E-giass 

Alkali corrosion is a surface attack on laminates, because, for example, caustic soda has lower wetting properties compared to water and therefore penetrates the resin to a much smaller degree. First, water penetrates and preferably accumulates at the interfaces. This water accumulation facilitates liber damage by the alkaline medium, because the water prepares surface diffusion or capillary paths along the glass fibers. 

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