Inputted Power Intensity Influences on the Recovery Product Distribution of the Microwave-pyrolyzed Waste Polarizing Film

摘要

This study examined the inputted microwave power on the products distribution of waste polarizing film recovery using microwave pyrolysis. The quantity of waste polarizing film gradually increased with the demand of liquid crystal display (LCD) in last decade. First, analysis the composition and characteristics of waste polarizing film in order to facilitate the evaluation of follow-up experimental results. Subsequent to the microwave pyrolysis treatment (nitrogen atmosphere and 30 min irradiation) on the waste polarizing film, the change of solid, liquid and gas products were individually analyzed in term of the various inputted microwave power. The results showed that the heating rate and the liquid production increased with the microwave power. In contrast, the mass of remained solid products decreased with inputted power increasing, which could be attributed to the volatiles of the waste polarizing film released and transformed into the liquid phase. It was also noted that the minimum 300 W of inputted microwave power was necessary to trigger the microwave-induced pyrolysis for the waste polarizing film recovery.