| Autor: |
E.S. Gankina, Ye.B. Milovskaya, L.V. Zamoiskaya, Ye.Ye. Kever |
| Rok vydání: |
1979 |
| Předmět: |
|
| Zdroj: |
Polymer Science U.S.S.R.. 21:3062-3068 |
| ISSN: |
0032-3950 |
| DOI: |
10.1016/0032-3950(79)90142-4 |
| Popis: |
To synthesize organo-aluminium compounds with a polystyryl radical (PS)n. ·AIEt3−n, thermal polymerization of styrene was carried out in the presence of AlEt3 as a chain transfer agent. It was established that by changing the ratio of monomer: :chain transfer agent, the length of the polymer radical may be adjusted over a wide range (P = 2–800); a high degree of substitution of ethyl groups may only be observed for radicals of comparatively low molecular weight (P = 2–30). A study was made of the formation mechanism of (PS)nAlEt3−n. Results prove that the main method of formation is by a homolytic reaction, which takes place with free polystyryl radicals. Step-by-step introduction of the monomer at the AlC bond has been little investigated. Synthesis and study of the behaviour of (PS)nAlEt3−n are of interest because these compounds are used as components of the AlR3-acyl peroxide type initiating system. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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