| Autor: |
Auer, Markku, Kettunen, Mika, Abu-Surrah, Adnan S., Leskelä, Markku, Wilen, Carl-Eric |
| Jazyk: |
angličtina |
| Rok vydání: |
2004 |
| Zdroj: |
Auer, M, Kettunen, M, Abu-Surrah, A S, Leskelä, M & Wilen, C-E 2004, ' Alternating copolymerization and terpolymerization of vinyl-substituted phenolic antioxidants with propene and carbon monoxide by a palladium(II)-based catalyst : Polyketones containing intramolecular stabilizers ', Polymer International, vol. 53, no. 12, pp. 2015-2019 . https://doi.org/10.1002/pi.1617 |
| DOI: |
10.1002/pi.1617 |
| Popis: |
The copolymerization and terpolymerization reactions of the vinyl‐substituted phenolic stabilizers, 6‐tert‐butyl‐2‐(1,1‐dimethylhept‐6‐enyl)‐4‐methylphenol, o‐allylphenol, 4‐methylstyrene‐2,6‐di‐tert‐butylphenol and 2,6‐di‐tert‐butyl‐4‐allylphenol, with propene and carbon monoxide, by using the solvent‐stabilized palladium(II) phosphine complex [Pd(dppp)(NCCH3)2](BF4)2 (dppp, 1,3‐bis(diphenylphosphino)propane) as a catalyst precursor and methanol as a co‐catalyst, is described. The influence of functional α‐olefins/CO units, distributed statistically along the propene/carbon monoxide (P/CO) copolymer backbone, on the molecular weight, glass transition temperature (Tg), elastic behavior and stability of the high‐molecular‐weight P/CO copolymer has been investigated. Loss of both elasticity and transparency were observed upon incorporating o‐allylphenol as a termonomer. The terpolymers, which contain phenolic stabilizers, were shown to be more stable when compared to the stabilizer‐free polyketones. In contrast to the propene/carbon monoxide copolymer, no degradation was observed for the 2,6‐di‐tert‐butyl‐4‐allylphenol/P/CO terpolymer; instead, the molar masses increased. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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