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1B-O2-1800 PDF
熱分解 GC-大気圧化学イオン化-四重極飛行時間型-質量分析法 (Py-APGC-MS) を用いた高分子の末端構造解析
The reliable identification of the characteristic pyrolysis products should be essential for pyrolysis (Py-) GC-MS analysis of polymeric materials. For this purpose, the observation of a molecular (related) ion and its precise mass measurement often play the key roles. Recently, a new GC-MS system using atmospheric pressure chemical ionization (APCI) combined with quadrupole time-of-flight mass spectrometer (QTof) was developed. Because of the combination of soft ionization nature of APCI to form a molecular ion and high mass resolution of QTof, much more useful information in the GC eluted components should be obtained. In this work, a Py-GC-MS system using APCI-QTof (Py-APGC-MS) was examined in terms of the characterization of chain ends structure in polymer materials. The characteristic pyrolyzates reflecting the chain ends formed with an initiator fragment in a methyl methacrylate-styrene-n-butyl acrylate terpolymer sample was exclusively identified by Py-APGC-MS.