ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Oriented polyamides were irradiated with 1.5-M.e.v. electrons and the paramagnetic resonance was examined to determine the radical species. The spectrum is composed of two radical species which decay at different rates. The predominant radical has a spectrum with three main lines (intensity ratio; 1:2:1), each split into two. The doublet splitting changes with the rotation of the magnetic field, while the triplet splittings undergo slight change. The spectrum indicates that the radical is of an unpaired electron interacting with one σ-proton and two equal π-protons. In addition, the width of the individual lines is broad (half width = ca. 18 gauss) and it is presumably due to the ill-resolved hyperfine structure of NH group. These confirm that the radical is —CONHCHCH2— as indicated by the findings of Burrell on irradiated amides. The other radical has a five-line spectrum, which indicates that the radical may be of the type resulting from a —C—C— bond scission, although not fully investigated.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1963.100010115
