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CO₂레이저빔 조사량에 따른 플라스틱 Dent 형성에 관한 연구
조새련,김영섭,양경승,박영신,신용진,이상열,박영식 조선대학교 기초과학연구소 2001 自然科學硏究 Vol.24 No.-
We studied the interactions of Gaussian CO₂ laser beam with two kinds of plastics. polymethyl methacrylate(Acryl) and acrylonitrile-butadiene-styrene(ABS) by examining the profiles of the holes which were perforated by focused irradiations on samples A rim around hole was observed on the ABS sample while only a melt zone was observed on the Acrylic sample. This difference may be explained in terms of the most dominant drilling process among three different mechanisms; melt ejection, vaporization, and chemical degradation. The hole profiles on the ABS and acrylic sample are fitted well to a Gaussian and complementary error function respectively. The volumes of the holes drilled by laser beams are proportional to the total irradiated energy on the samples, which may indicate that only the fixes portion of absorbed laser power is used to form the holes through ranges of irradiated beam energy, the diameters of holes on both samples are gradually approaching differently, to a certain value with increasing irradiated beam energy. On the ABS sample, the width of the rim exhibits a variation with irradiated energy in the same way as the diameter of the hole does and the height of the rim is increasing linearly with increasing beam energy. The width of the melt zone on Acrylic sample is also approaching to a certain value gradually with irradiated energy.
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