Comparison of the role of milled glass and carbon fibers on mechanical properties of (bisphenol A)‐based epoxy composites

Abstract

The main target of the current work was to study the mechanical properties of milled E-glass, S-glass, and high-strength (carbon fiber)-reinforced epoxy composites. At first, tensile behavior of the as-received fibers was evaluated by conducting different tensile tests. Afterwards, the effects of employing an integral blended coupling agent on the performance of the pure epoxy were investigated by microhardness tests and optical microscopic images. Then, the epoxy composites were prepared simply by mixing and stirring 1, 3, and 5 wt% of the milled fibers with the epoxy resin and its hardener. The effects of mixture degassing and addition of the coupling agent to the mixture were examined based on the mechanical properties of the fabricated composites. Also, scanning electron microscope macro-and micrographs of the transverse and longitudinal fracture surfaces were used to study the fracture behavior and identify the active toughening mechanisms. The best results were obtained for the degassed and modified milled (carbon fiber epoxy)-reinforced composite, which enhanced the tensile strength, elongation, Young's modulus, and toughness up to 12%, 17%, 19%, and 27%, respectively. The current study shows that the composite not only is cost effective but also offers better mechanical properties. J. VINYL ADDIT. TECHNOL., 24:130-138, 2018.

Novel Application of Mechanochemistry in Waste Epoxy Recycling via Solid-State Shear Milling

“…Mechanical recycling mainly uses impact, shearing, compressing, and other mechanical forces to pulverize the waste epoxy, and pulverized epoxy resins typically are reused as fillers. − Mechanical recycling is an industrial way that is simple in process, and no harmful substances are produced without changing their molecular structure in the recycling process . However, traditional mechanical recycling is only a simple crushing of waste epoxy, and is difficult to destroy the crosslinking structure of the epoxy effectively, which leads to poor interfacial strength on the surface of the epoxy powder and poor mechanical strength of final composites. , The recycled material can only be used as inorganic filler with low value. A new strategy is highly desired to recycle epoxy for high-performance and high value-added composites.…”

“…32 However, traditional mechanical recycling is only a simple crushing of waste epoxy, and is difficult to destroy the crosslinking structure of the epoxy effectively, which leads to poor interfacial strength on the surface of the epoxy powder and poor mechanical strength of final composites. 33,34 The recycled material can only be used as inorganic filler with low value. A new strategy is highly desired to recycle epoxy for high-performance and high value-added composites.…”

New Intelligent Semi-Products based on Recycled Carbon Fibres

“…-Milled fibres (fibre length < 1 mm) [3] [4] -Chopped fibres (3mm<fibre length<20mm) [4] -Wetlaid non-woven fabrics (fibre length<20mm) [5] -Carded non-woven fabrics (20mm< fibre length < 40mm) [5] These rCF semi-products are industrially produced and available at large scale. Their quality is controlled and thus convenient to produce new "2 nd generation" composites.…”

Synergistic effects of organically modified montmorillonite in combination with metal oxides on the fire safety enhancement of intumescent flame‐retarded epoxy resins

“…As a thermosetting resin, epoxy resins (EPs) have got a wide range of applications in multifaceted fields as a result of its brilliant merits such as distinct mechanical performance, good chemical corrosion resistance, a strong cohesive force with the substrate, and popular price. [1][2][3] In spite of these virtues, the inherent combustibility of EP will give off a good deal of heat and smoke when burning, which is unable to suffice the fire prevention safety requirements in some special fields. [4,5] Whereupon, there is a strong necessary to pay more efforts to improve the fire safety of EPs via adding flame retardants, so as to warranty the leading position of EPs in the advanced field.…”