Simultaneous TG-MS Studies on Polymers Derived from Monomers with a Polar Group

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概要

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• Thermal degradation behavior of polymers derived from monomers with a polar group was investigated by thermogravimetry interfaced to mass spectrometry (TG-MS) to see its applicability to the investigation on thermal degradations of polymers. The polymers studied were poly(methyl methacrylate) (PMMA), poly(methyl acrylate) (PMA), and polyacrylamide (PAM). Decomposition products of PMMA consist exclusively of methyl methacrylate monomers that were formed through random scissions of main chains followed by depolymerization. Initiation temperature of the random scission of PMMA was strongly influenced by its micro-structures, such as head-to-head and head-to-tail linkages and vinyl terminated chain ends, which suggests that subtle difference of polymer structures can be elucidated by TG-MS studies. This could be the characteristic feature of TG-MS that differentiates from other analytical method. During thermal degradation of PMA, unbuttoning reactions, some portion of unzipping reactions, and random scission of main and side chains occurred to afford a wide variety of products including monomers, oligomers, and some other unknown substances. Intra- and intermolecular imidation reactions between the side chain amide groups proceeded to yield glutarimide rings through main chains and crosslinking, respectively, during the initial stage of heat-treatments of PAM. Then, various low molecular weight compounds such as glutarimide and its analogues were formed by the decomposition on further heat-treatment at elevated temperature. The thermal degradation mechanism of these polymers was discussed in terms of the ceiling temperature of the monomers from which these polymers were derived. The results obtained were in good accordance with those reported using other analytical methods, which indicates that TG-MS could be one of the useful techniques for the investigation of thermal degradations of polymers.

• 日本質量分析学会の論文
• 2001-04-01

著者

• CHEN Jian

  Department of Electronics, Nagaoka University of Technology

• Chen J

  Department Of Materials Science And Engineering Faculty Of Engineering Fukui University

• ISA Kimio

  Department of Natural Science Education, Faculty of Education and Regional Studies, Fukui University

• KODAIRA Toshiyuki

  Department of Materials Science and Engineering, Faculty of Engineering, Fukui University

• Isa K

  Faculty Of Education And Regional Studies University Of Fukui

• Isa Kimio

  Department Of Chemistry Faculty Of Education And Regional Studies Fukui University

• Senda T

  Ship Res. Inst. Ministry Of Transport Tokyo

• SENDA Tetsuya

  Rigaku Co., Ltd.

• Senda Tetsuya

  Rigaku Co. Ltd.

• Chen Jian

  Department Of Biotechnology Southern Taiwan University Of Technology

• Kodaira T

  Department Of Materials Science And Engineering Faculty Of Engineering Fukui University

• Chen Jian

  Department Of Biochemistry And Molecular Biology Third Military Medical University

• Kodaira Toshiyuki

  Department of Industrial Chemistry, Faculty of Engineering, Fukui University

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