Thermal-induced conversion of maleic and fumaric acid anion radicals in poly(methyl methacrylate)

Journal Article · Tue Apr 01 00:00:00 EST 1980 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1980.170180408· OSTI ID:5101863

Torikai, A; Fukumoto, M

Thermal-induced conversion of maleic and fumaric acid anion radicals produced by ..gamma.. irradiation at 77/sup 0/K in poly(methyl methacrylate) (PMMA) was studied by electron spin resonance (ESR) and optical absorption spectroscopic measurements. The ESR spectra of these acid anion radicals change into two-line spectra with a line separation of ca. 10 G by thermal annealing. This spectrum is assigned to a protonated radical of each acid anion radical. Anion radicals of the solutes are relatively stable below the ..gamma.. transition point of PMMA and the conversion reaction takes place near this point. This means that the molecular motion of matrix molecule affects the radical conversion reaction.

• Research Organization: Nagoya Univ., Chikusa-ku-Nagoya, Japan
• OSTI ID: 5101863
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Vol. 18:4
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
PMMA
RADIOLYSIS
RADICALS
ELECTRON SPIN RESONANCE
FUMARIC ACID
GAMMA RADIATION
LOW TEMPERATURE
MALEIC ACID
CARBOXYLIC ACIDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DICARBOXYLIC ACIDS
ELECTROMAGNETIC RADIATION
ESTERS
IONIZING RADIATIONS
MAGNETIC RESONANCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYACRYLATES
POLYMERS
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RESONANCE
400600* - Radiation Chemistry