Before the boundary, the diameter and length of the fibers in the B-FWJ did not change significantly, but the number of fibers in the B-FWJ showed an increasing trend.
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Accelerated Hydrothermal Aging and Degradation Mechanism of PE100 Butt-Fusion Welded Joint.
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Figure 8 demonstrates that, as the aging duration increased, the antioxidants within the B-FWJ, which had undergone hydrothermal aging at various temperatures, underwent gradual consumption, resulting in a decreasing trend in their OIT values.