Published : 2024-08-28

Effect of moisture on breakdown strength and glass transition temperature of bio-polyamide reinforced with glass or basalt fiber

Abstract

In this study we investigate the effect of moisture content on the dielectric breakdown strength and glass transition temperature (Tg) of bio-polyamide 4.10 reinforced with glass or basalt fiber (15, 30, 50 wt%). Moisture absorption decreased with increasing fiber content, regardless of fiber type. The reduction in breakdown voltage (BDV) was more pronounced in the composites with higher moisture content reinforced with basalt fiber. This may be due to weaker interactions at the interface. The presence of moisture decreased the glass transition temperature of the composites. PA 4.10, especially reinforced with glass fiber, is characterized by better performance properties than PA 6.6 reinforced with 50 wt% glass fiber in applications requiring both stability of mechanical properties and dielectric  properties.



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Bednarowski, D. ., Kuśnierz, A. ., & Kuciel, S. . (2024). Effect of moisture on breakdown strength and glass transition temperature of bio-polyamide reinforced with glass or basalt fiber. Polimery, 69(7-8), 404–412. https://doi.org/10.14314/polimery.2024.7.2