Abstract
AbstractThe feasibility of using recycled FR‐4 epoxy laminates as reinforcing fillers in manufacturing unsaturated polyester (UP) composites was studied using differential scanning calorimetry (DSC), and flexural tests. UP resins filled with recycled laminates had a higher flexural strength and modulus than the plain UP because of energy dissipation effects from glass fibers and rigid epoxy resins in the laminates. The size and loading of the laminates affected the flexural properties of the molded products. The addition of CaCO3 fillers and Cu decreased the flexural strength but promoted the flexural modulus of the UP. As revealed by DSC measurements the presence of laminates affected the free‐radical reaction of the UP resin and decreased the curing rate. The curing kinetics were also dependent on the size and relative content of the laminates added.
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