抄録
Pyrolysis infrared spectroscopy system using a pyrolysis probe has been developed for the rapid identification of waste rubbers containing a large amount of carbon black. This system consists of a pyrolysis probe, flexible and heatable gas guide, FT-IR, and computer. The small area of the surface of a plastic part is pyrolyzed momentarily with the pyrolysis probe, and the gaseous pyrolyzate is carried with nitrogen gas cell in FT-IR, the type of plastic is then identified with the IR spectra of the pyrolyzate. This method has the following features; (1) Almost all kinds of waste rubbers used for automobile parts can be identified in a few seconds. (2)Samples do not need to be carried. (3)Surface degradation and stains do not affect the identification. And (4) automatic identification system using this technique has made it possible to identify rubbers by only one action. The application of this method to the identification of weather-strips which had been collected from scrapped cars has confirmed that this method is useful for sorting before devulcanization process of waste rubbers.
