Spin-labelled gels of poly(methyl acrylate)

A. Rockenbauer, Mikael Lindgren, Masayoshi Tabata, Wu Yang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Spin-labelled poly(methylacrylate) (PMA) was investigated by ESR both in the swollen and in the dried gel state. The polymerization was induced by γ-irradiation; the spin-labelling was carried out by thermal treatment in the presence of 2,4,6-trichloronitrosobenzene. The labelling takes place both on the methine and the methylene carbons of the PMA chain resulting in a triplet and a six-line ESR spectrum respectively. For both radicals, the correlation time is of the order of 10-9 sec in the swollen gel and 10-8 sec in the dried gel. The temperature dependence of the ESR signal associated with the three-line radical and six-line radical could be analysed in terms of a diffusion model. The activation energies were determined as 23 and 19 kJ/mol, respectively. The radical structures and reactions are discussed.

Original languageEnglish
Pages (from-to)945-950
Number of pages6
JournalEuropean Polymer Journal
Volume29
Issue number7
DOIs
Publication statusPublished - 1993

Fingerprint

acrylates
Paramagnetic resonance
Gels
gels
Labeling
marking
Carbon
Activation energy
Heat treatment
Polymerization
methylene
Irradiation
line spectra
polymerization
activation energy
temperature dependence
irradiation
methyl acrylate
carbon
Temperature

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Spin-labelled gels of poly(methyl acrylate). / Rockenbauer, A.; Lindgren, Mikael; Tabata, Masayoshi; Yang, Wu.

In: European Polymer Journal, Vol. 29, No. 7, 1993, p. 945-950.

Research output: Contribution to journalArticle

Rockenbauer, A. ; Lindgren, Mikael ; Tabata, Masayoshi ; Yang, Wu. / Spin-labelled gels of poly(methyl acrylate). In: European Polymer Journal. 1993 ; Vol. 29, No. 7. pp. 945-950.
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