Title: Mechanical and Barrier Properties of Carbon Nanotubes Reinforced Vinyl-Ester Composites

Authors: Yasaman Alaei, Mathieu Robert, Patrice Cousin, Brahim Benmokrane

DOI: 10.33599/nasampe/c.24.0234

Abstract: Vinyl-ester resin (VE) is a widely used polymer matrix in civil engineering applications; however, its susceptibility to moisture absorption in humid environments poses a significant challenge. To address this concern, the effect of using carbon nanotubes (CNTs) with exceptional mechanical properties as reinforcement within the resin matrix was investigated in this research. Multi-wall carbon nanotubes (MWCNTs) were chemically functionalized through acid oxidation, and their effect on mechanical properties, moisture absorption resistance, and barrier properties in vinyl-ester-based nanocomposites was comprehensively evaluated. Scanning electron microscopy (SEM), tensile test, and dynamic mechanical analysis (DMA) were performed to analyze samples containing 0 wt.% and 0.1 wt.% of as-received and functionalized CNTs. To ensure the stability of CNTs dispersion within the resin, small quantities of two industrial dispersing agents as block copolymer of unsaturated polycarboxylic acid and polyxiloxane, (BYK 104 S) and alkylammonium salt of a high molecular weight copolymer (BYK 9076) were added. Barrier properties and moisture diffusivity were assessed through immersion tests in a 50 ºC water bath. Results demonstrate that the addition of oxidized CNTs significantly enhances the moisture absorption resistance and barrier properties of the composites, making them more suitable for humid environments compared to nano clay-based nanocomposites.

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Conference: CAMX 2024 | San Diego CA

Publication Date: 2024/9/9

SKU: TP24-0000000234

Pages: 8

Price: $16.00