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Discrimination of Poly(butylenes adipate-co-terephthalate) and Poly(ethylene terephthalate) with Fourier Transform Infrared Microscope and Raman Spectroscope
Authors:Yanming Cai  Jimin Feng  Yong Liu  Zhaohong Wang  Meng Zhao
Institution:1. Agro-Environment Protection Institute , Ministry of Agriculture , Tianjin , China;2. Key Laboratory of Production Environment and Agro-product Safety , Ministry of Agriculture , Tianjin , China;3. Procuratoral Technology and Information Research Center , Supreme People's Procuratorate , Beijing , China
Abstract:ABSTRACT

The analysis of plastics and fibers is of importance to forensic scientists, especially in the investigation of trace evidence. In this study, we use Fourier transform infrared microscope and confocal Raman spectroscope to investigate two kinds of polymers: poly(butylenes adipate-co-terephthalate) and poly(ethylene terephthalate), which are very similar in structure and cannot be discriminated easily with other instruments. Infrared and Raman spectra were tentatively interpreted. The indicative peaks (937 cm?1, 1121 cm?1 in Infrared spectra; 996 cm?1, 1396 cm?1 in Raman spectra) to distinguish the two polymers were also summarized. The data in this study can help forensic scientists identify these two polymers accurately and avoid wrong certificate of authenticity. The data also offer the producer and researchers an effective and fast method to characterize and identify the poly(butylenes adipate-co-terephthalate).
Keywords:confocal Raman microscope  Fourier transform infrared microscope  poly(butylenes adipate-co-terephthalate)  poly(ethylene terephthalate)
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