Abstract
PWFA recycled composite, which is made mostly from plastic waste and fly ash, is one of the materials developed for the purpose of recycling. The authors observed the cutting surface of the composite using a metalloscope and measured the thermal conductivity of the composite using two guarded hot plate apparatus suitable for the different sizes of specimen 100×100 and 50×50 mm2 in area.
The spherical particles of fly ash disperse at irregular intervals in the matrix. The matrix composed of the plastic waste and the fire retardant is the continuous phase. And there is a dense area of voids inside the specimen. The thermal conductivity decreases from 0.44 to 0.38 W · m-1 · K-1 with increasing the specimen temperature from 250 to 350 K. The data for the specimen 50×50 mm2 are lower than those for the specimen 100×100 mm2, but agree with those for the specimen 100×100 mm2 within 5%.
