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| Autores principales: | , , , |
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| Formato: | Artículo Open Access |
| Publicado: |
Wiley
2025
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| Materias: | |
| Acceso en línea: | https://onlinelibrary.wiley.com/doi/10.1002/app.57613 |
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- Effect of the Fused Particle Method on Indentation Compression Stress and Stress Relaxation of Nylon 12/Epoxy Composites Nur Syahrul Nizam Abdul Malek Engku Zaharah Engku Zawawi Ahmad Zafir Romli Nik Noor Idayu Nik Ibrahim Journal of Applied Polymer Science ABSTRACTThis study explores the fused particle method as a potential approach to mitigating the negative effects of filler agglomeration on composite properties. Composites are fabricated with 3%, 9%, and 15% filler loadings, and the cured samples are subjected to fusion at 195°C and 205°C for 20, 60, and 100 min to promote particle fusion. Indentation compression tests evaluate surface hardness, while stress relaxation analysis assesses viscoelastic behavior. Pristine epoxy shows the highest indentation stress and lowest stress relaxation due to its highly crosslinked structure. At 3% loading, voids and weak filler–matrix interactions reduce stress resistance, but extended fusion improves performance. Nine percent filler loading provides the most stable mechanical performance, maintaining consistent stress before and after fusion due to optimal filler distribution, reduced shrinkage effects, and enhanced filler–matrix adhesion. In contrast, 15% loading results in excessive agglomeration and early‐stage weakness, with limited improvement even after fusion. Fusion at 205°C yields slightly lower stress than 195°C, likely due to epoxy softening and shrinkage‐induced voids. Stress relaxation decreases with increasing filler content and fusion time, as chain mobility becomes restricted by the semi‐crystalline filler network. However, at 15% loading, shrinkage and incomplete fusion counteract these benefits, leading to minimal improvement in relaxation behavior. 10.1002/app.57613 http://onlinelibrary.wiley.com/termsAndConditions#vor