Comparison on properties of high quality recycled polycarbonate and virgin polycarbonate materials
The high value-added utilization of waste plastics requires regenerated plastics to possess excellent performance.Therefore,a comparative study was conducted on the chemical structure,impurity elements,rheological properties,and dielectric properties of high-valued recycled polycarbonate(R-PC)material(contains 50%post-consumer physically recycled polycarbonate raw materials)and virgin polycarbonate(V-PC)material.Additionally,the effects of thermal aging(at 120℃)and hydrothermal aging(at 80℃and 80%humidity)on optical and mechanical properties of these materials were further analyzed.The results show that the chemical structure of R-PC remains intact,with no significant degradation observed.The R-PC material contains trace amounts of impurities of chlorine,iron,and calcium,with concentrations of 0.000 9 wt%,0.000 7 wt%,and 0.001 1 wt%,respective-ly.Rheological properties of R-PC are similar to those of virgin V-PC material,indicating no significant branching or crosslinking phenomena for R-PC.Therefore,similar processing equipment and comparable processing conditions can be employed for the processing of the R-PC material.The performances changes of the high-valued R-PC material in terms of thermal and hydrothermal aging remain consistent with those of the virgin V-PC.After aging,the optical and mechanical properties of the two materials have little difference,and the elongation at break of R-PC is more susceptible to thermal aging and hydrothermal aging.Overall,the high-valued R-PC material exhibits excellent mechanical and optical properties as well as good thermal and hydrothermal aging stability.
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