Fingerprinting of bottle-grade poly(ethylene terephthalate) via matrix-assisted laser desorption/ionization mass spectrometry

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• 作者：W ; erson Romã ; o ; Marcos F. Franco ; Amadeu H. Iglesias ; Gustavo B. Sanvido ; Danilo A. Maretto ; Fabio C. Gozzo ; Ronei J. Poppi ; Marcos N. Eberlin ; Marco-Aurelio De Paoli
• 关键词：Poly(ethylene terephthalate) ; Thermomechanical degradation ; MALDI-MS ; Recycling process ; Principal component analysis ; PCA
• 刊名：Polymer Degradation and Stability
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：95
• 期：4
• 页码：666-671
• 全文大小：744 K

文摘

Matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) has been shown to provide a valuable technique to study the thermomechanical degradation of poly(ethylene terephthalate) (PET). MALDI-MS has been tested to monitor both the admixture of post-consumption bottle-grade PET (PET_pc-btg) with virgin bottle-grade PET (PET_v-btg) and the thermomechanical degradation effects on the chemical properties of PET_v-btg. Principal component analysis of MALDI-MS data classify the samples into groups with specific features: a) PET-btg with intrinsic viscosities of 0.80 or 0.65–0.60 dL g⁻¹); b) processed or virgin PET with the same intrinsic viscosity; c) PET_v-btg from PET containing PET_pc-btg; and d) PET_v-btg from different manufacturers. MALDI-MS data is therefore able to reveal the quality of PET-btg resins preventing frauds and illegal use of recycled PET-btg.