This study aims to assess the impact of water absorption on the mechanical properties of CNTs-composite using dynamic mechanical analysis (DMA). Water absorption results in a decrease in mechanical properties, such as storage modulus and Tan δ, due to swelling and plasticization effects. Specifically, the presence of water in the matrix causes the Tan δ peak to broaden. Following an approach that considers the Tan δ peak as comprising multiple relaxation mechanisms activated at different temperatures, an average glass transition temperature reduction of 20 °C was observed, along with a decrease in “network homogeneity” from 0.95 to 0.62 as water absorption increased.
Effect of Water Sorption on the Mechanical Properties of a CNT-Based Epoxy Resin
Aliberti F.;Longo R.
2025
Abstract
This study aims to assess the impact of water absorption on the mechanical properties of CNTs-composite using dynamic mechanical analysis (DMA). Water absorption results in a decrease in mechanical properties, such as storage modulus and Tan δ, due to swelling and plasticization effects. Specifically, the presence of water in the matrix causes the Tan δ peak to broaden. Following an approach that considers the Tan δ peak as comprising multiple relaxation mechanisms activated at different temperatures, an average glass transition temperature reduction of 20 °C was observed, along with a decrease in “network homogeneity” from 0.95 to 0.62 as water absorption increased.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
