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Poster Presentations
Day 3, June 24（Tue.）
Room P (Maesato East, Foyer, Ocean Wing)
- 3P-AM-40
End Group Analysis of Polycarbonates Using EGA-FI-TOFMS and Principal Component Analysis (PCA)
(1AIST, 2Nagoya Univ.)
oSayaka Nakamura1, Hiroaki Sato1, Takato Ishida2, Hideaki Hagihara1, Hideyuki Shinzawa1, Ryota Watanabe1
End group structures in polymer materials are one of important factors which affect physical properties. However, the small portion of end groups in polymer chains interrupts to obtain the detailed information about end groups. The pyrolysis of polymer molecules typically initiates from both ends. Therefore, the pyrolysis products containing end groups are expected to evolve at lower temperatures region compared to main pyrolysis of polymer molecules. Evolved gas analysis-mass spectrometry (EGA-MS) can record mass spectra continuously according to elevating temperature. A soft ionization, field ionization (FI) was used for better understanding of evolved/pyrolysis products without fragmentation. To extract key information of end group structures selectively from numerous temperature-dependent mass spectra, we adopted principal component analysis (PCA). Kendrick mass defect (KMD) analysis was introduced for effective interpretation of complex high-resolution mass spectra. This approach enabled the selective extraction of end group-derived ions, successfully determining their structures. This newly developed technique combining EGA-FI-TOFMS, PCA and KMD analysis selectively extracted trace amounts of unique ions associated with end structures according to the pyrolysis behavior.