Determination of Small-Amount Polypropylene in Imported Recycled Polyethylene/Polypropylene Blends by Fourier Transform Infrared Spectroscopy

In the domestic production of recycled plastics, it is difficult to separate olefin polymers such as polyethylene and polypropylene. Therefore, prerequisite for identifying cargo-solid waste properties plastics determine polymer composition. this paper, Fourier transform infrared spectroscopy was used detect polypropylene content in blends. Under 2%-8% content, an exponential relationship shown ratio characteristic peak area. This method features fast detection speed accurate judgment. It can quickly whether blends greater than 5% tariff inspection. Also, plastic solid attributes identify mixed with a small amount content.