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Outdoor Weathering Stability of Fiber Reinforced Polymers

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Outdoor Weathering Stability of Fiber Reinforced Polymers for Fiberglass Crossarms

 

Outdoor weathering stability of composite materials is critical to the longevity and service life of fiber glass crossarms.  In this paper, we compared accelerated outdoor weathering stability for a series of FRP composite materials with or without UV protective coatings.  The test specimens were cut from fiberglass crossarms produced by different fiber glass crossarm manufacturers and were exposed to QTrac concentrated natural sunlight for 12 months of accelerated outdoor weathering according to ASTM G90.  They were then evaluated by non-destructive surface analysis for total color changes, specimen thickness changes, changes in surface energy and surface resistivity.  Our results showed significantly less changes in tested values for the test specimens with a UV protective coating than those without any coating, indicating the effectiveness of a UV protective coating for preventing FRP composite materials from UV-induced surface degradation and for extending service life of fiberglass crossarms.  By comparing the changes in measured values among the tested specimens, we found similar trends for total color changes, changes in specimen thickness, estimated surface energy, and fiber blooming, indicating the correlations between these tested surface properties and the degree of UV-induced surface degradation.

 

Authors: Jiayi Jenny Zhu, Bruce Blumentritt, Dean J Casad, and Michael S. Schoenoff

 

Conference: CAMX 2016 – Anaheim

 

SKU/Code: TP16-0024

 

Pages: 10



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