Wood-plastic composites are prepared under Co-60 γ irradiation with simul, a low-grade wood of Bangladesh using four different bulk monomers (styrene, methylmethacrylate, butylmethacry-late, and acrylamide) at different methanol concentrations in the presence of a number of additives such as NVP, TPGDA, TMPTA, sulfuric acid, urea, and lithium nitrate. The effect of copper sulfate is studied in these systems. The optimum CuSO4concentration for obtaining the highest polymer loadings is determined.