| 摘要 |
<p>PROBLEM TO BE SOLVED: To regenerate raw rubber from rubber pieces by selecting a laser beam of a wavelength which resonates to a stretching vibration of a specific molecular bond of a polymeric material from variable-wavelength mid infrared region laser beams and emitting it on the polymeric material, and selectively decomposing the specific molecular bonds of the polymeric material and decomposing the polymeric material. SOLUTION: A specific semiconductor device which produces a laser beam, having a wavelength resonating to the stretching vibration of the specific molecular bond of a rubber piece 5 to be composed is selected out of each semiconductor devices 2a, 2b,.... In the case of a benzyldisulfide having S-S bonds for example, the wavelength of the stretching vibration of its specific molecular bond is 13.2μm, and a rubber piece 5 of a polymeric material having an S-S bonds is decomposed by emitting a laser beam matching the vibration wavelength for selectively decomposing the specific molecular bonds by resonance. In this case, it is possible to regenerate the decomposed rubber piece 5 into original raw rubber, since decomposition is performed by selecting a wavelength which resonates to the stretching vibration of the S-S bonds of the sulfur S of the polymeric material of the benzyldisulfide.</p> |
