Establishment of luminescence spectroscopy and its application to polymers

2014 Fiscal Year Final Research Report

• Project/Area Number: 24550012
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: NAKATA Munetaka 東京農工大学, (連合)農学研究科(研究院), 教授 (40143367)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ルミネッセンス分光法 / 高分子劣化 / ガンマ線照射 / 反応機構

Outline of Final Research Achievements

Chemiluminescence from polymers during heating was measured as a spectrum with a multichannel Fourier-transform chemiluminescence spectrometer. In general, luminescence spectra are superimposed by emission bands due to some luminophores. We established luminescence spectroscopy to find time- and temperature-dependent spectral profiles of each emission band by a least squares fitting process using Gaussian functions. Mechanisms of thermal oxidative degradation of hydrocarbon polymers such as polypropylene and gamma-irradiated degradation of fluorocarbon polymers such as polytetrafluoroethylene were investigated by the luminescence spectroscopy at the molecular level. It was concluded that peroxides and peroxy radicals play the roles of luminophore and its precursor, respectively.

Free Research Field

物理化学