TY - JOUR
T1 - Resonance absorption of coherent infrared radiation by thin polypropylene films and its technological applications
AU - Bormashenko, Edward
AU - Pogreb, Roman
AU - Sheshnev, Avigdor
AU - Sutovski, Semion
AU - Shulzinger, Alexander
AU - Nachum, Lior
AU - Kerbel, Roi
N1 - Funding Information:
The authors wish to thank the Israeli Ministry of Science (Project No. 1461-2-00) and the Ministry of Absorption for their support of this work. The authors thank Professor Abraham Katzir for his inestimable support of our experimental activity, and Dr. Zahava Barkay for supplying SEM images of our samples.
PY - 2003/12/30
Y1 - 2003/12/30
N2 - Tunable CO 2 and non-tunable CO 2 lasers were used for the irradiation of thin polypropylene films. The wavelength of the IR radiation was adjusted in such a way that it coincided exactly with the absorbance peak in the spectrum of the polypropylene pattern. In this way, conditions of resonance absorption of IR radiation by polymer films were produced. Strong thermal effects in PP were observed under irradiation at the resonance wavelength. The threshold value of IR power, which causes thermal phenomena in irradiated films was established. We pulled films exposed to established threshold values with a constant speed in the plane normal to the laser beam. Highly developed relief and thin traces were formed depending on the pulling speed. Traces with a width smaller than the wavelength of the incident laser beam were obtained. The IR spectra of irradiated PP films were studied with a FTIR spectrometer. Changes in the spectra of PP films were established using correlation analysis of spectral data. The phenomenon could be applied for obtaining highly developed surface relief, storage of information in polymer films and welding of polymer materials.
AB - Tunable CO 2 and non-tunable CO 2 lasers were used for the irradiation of thin polypropylene films. The wavelength of the IR radiation was adjusted in such a way that it coincided exactly with the absorbance peak in the spectrum of the polypropylene pattern. In this way, conditions of resonance absorption of IR radiation by polymer films were produced. Strong thermal effects in PP were observed under irradiation at the resonance wavelength. The threshold value of IR power, which causes thermal phenomena in irradiated films was established. We pulled films exposed to established threshold values with a constant speed in the plane normal to the laser beam. Highly developed relief and thin traces were formed depending on the pulling speed. Traces with a width smaller than the wavelength of the incident laser beam were obtained. The IR spectra of irradiated PP films were studied with a FTIR spectrometer. Changes in the spectra of PP films were established using correlation analysis of spectral data. The phenomenon could be applied for obtaining highly developed surface relief, storage of information in polymer films and welding of polymer materials.
KW - Infrared
KW - Polypropylene
KW - Relief
KW - Spectrum
KW - Tunable CO laser
UR - http://www.scopus.com/inward/record.url?scp=0142186204&partnerID=8YFLogxK
U2 - 10.1016/S0169-4332(03)00840-7
DO - 10.1016/S0169-4332(03)00840-7
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AN - SCOPUS:0142186204
SN - 0169-4332
VL - 220
SP - 125
EP - 135
JO - Applied Surface Science
JF - Applied Surface Science
IS - 1-4
ER -