Reaktion an ziegler‐natta‐katalysatoren, 16. Metathese‐abbau von polybutadien‐derivaten mit sauerstoff bzw. schwefel enthaltenden Substituenten
1978; Wiley; Volume: 179; Issue: 5 Linguagem: Inglês
10.1002/macp.1978.021790504
ISSN0025-116X
AutoresKlaus Hummel, Othmar A. Wedam, Wolfgang Kathan, Hans Demel,
Tópico(s)biodegradable polymer synthesis and properties
ResumoAbstract Methylene groups of 1,4‐polybutadiene were partially brominated with N ‐bromosuccinimide. A subsequent Grignard‐Wurtz‐reaction with 4‐methoxyphenyl‐, 3,4‐dimethoxyphenyl‐, and 2‐thienylmagnesium bromide resulted in an exchange of the bromine atoms for 4‐methoxyphenyl, 3,4‐dimethoxyphenyl and 2‐thienyl groups. Another type of modification was the reaction of 1,4‐polybutadiene with 4‐methoxytoluene and o ‐resp: p ‐toluic acid methylester in the presence of dicumyl peroxide. Thereby 4‐methoxyphenylmethyl and 2‐ resp. 4‐methoxycarbonylphenylmethyl groups were introduced into the polymer. The modified polymers were investigated by IR‐spectroscopy and degraded by olefin metathesis with 4‐octene using a WCl 6 /Sn(CH 3 ) 4 catalyst. The degradation products were separated by gas chromatography and identified by mass spectrometry.
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