The Synergistic Effects of Multi-Filler Addition on the Mechanical and Thermo-Mechanical Properties of Phenolic Resins

Abstract:

The effects of the carbon fiber (CF), carbon black (CB) and nanosilica (SiO₂) on the mechanical properties of the phenolic resin (PF) were studied and the optimum composition was selected for the preparation of quaternary composites (CF/CB/SiO₂ phenolic composites). The incorporation of poly (acrylonitrile-co-butadiene) rubber (NBR) to strengthen the quaternary composites were also studied. The morphological, mechanical and thermo-mechanical properties of unmodified and NBR modified-quaternary phenolic composites were investigated. The phenolic compounds were mixed by ball milling and the phenolic composites were fabricated by hot compression molding. Scanning electron microscopy images of NBR modified-quaternary phenolic composites show the high fracture surface roughness. The results show that the addition of 5 wt% NBR in the quaternary composites offer the highest tensile strength and Young’s modulus which are significantly improved by 176% and 235%, respectively, and they also offer the high flexural strength, impact strength and flexural modulus which are improved by 79%, 29% and 12%, respectively, compared to neat PF. The glass transition temperature (T_g) of unmodified and NBR modified-quaternary phenolic composites are higher than that of neat PF (107.3 °C). The increase of NBR content does not deteriorate T_g of the quaternary phenolic composites. This study provides a new pathway for making advanced phenolic composites.

• Periodical: Materials Science Forum (Volume 940)
• Pages: 23-27
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.940.23
• Online since: December 2018
• Authors: Pattarakamon Chaiwan, Jantrawan Pumchusak*
• Keywords: Carbon Black, Carbon Fiber, Dynamic Mechanical Analysis, Mechanical Property, Nanosilica, Phenolic Composite, Rubber

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DOI: 10.1016/j.compositesb.2017.11.056