IR laser ablative degradation of poly(ethylene terephthalate): Formation of insoluble films with differently bonded CO groups |
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Authors: | Marké ta Urbanová ,Anna Galí ková |
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Affiliation: | a Laboratory of Laser Chemistry, Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojova str. 135, 16502 Prague, Czech Republic b Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 ?e?, Czech Republic |
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Abstract: | IR laser-induced degradation of poly(ethylene terephthalate) (PET) was studied under different irradiation conditions and the ablated volatile and solid products were characterized by mass and infrared spectroscopy, gel-permeation chromatography, thermogravimetry and electron microscopy. The observed volatile products (carbon oxides, H2, C1-2 hydrocarbons, acetaldehyde, benzene and toluene) and less-volatile aromatic compounds are typical products of thermal degradation of PET. The ablatively deposited solid materials are a blend of soluble, structurally similar oligomers and of an insoluble polymer containing carbonyl groups bonded in a -C(O)OH arrangement. Thermal degradation of these deposited solids is controlled by decomposition of sublimed fractions and is easier than that of PET. |
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Keywords: | Poly(ethylene terephthalate) Laser-induced degradation Laser ablation Laser-induced polymer films Thermal degradation |
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