| Autor: |
D.Ya. Toptygin, G.B. Pariiskii, Ye.Ya. Davydov |
| Rok vydání: |
1975 |
| Předmět: |
|
| Zdroj: |
Polymer Science U.S.S.R.. 17:1730-1737 |
| ISSN: |
0032-3950 |
| DOI: |
10.1016/0032-3950(75)90177-x |
| Popis: |
ESR is used to study the photoconversions of the free ester group radicals of polymethylmethacrylate (PMM) which form in the polymer during the photo-reduction of added ferric chloride at low temperatures. An effective photo-dissociation of the ∼CH 2 C(CH 3 ) (COOCH 2 )CH 2 ∼ radicals which takes place on exposure to light of γ 2 C(CH 3 )··(C = O)CH 2 ∼ radical to form. Light of 400 γ 2 C(CH 3 )CH 2 ∼ radical. The latter was recorded for the first time in PMM and its parameters in the ESR spectrum determined. The HCO radicals forming during the photolysis initiated with ferric chloride under UV light are the conversion product of the primary radicals, and their yields increase on reducing the wavelength of the light. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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