New structures from the thermal rearrangement of polybutadiene revealed by 2D HSQC NMR

The thermal reactions of polybutadiene (PB) at 260 °C in inert atmosphere were followed by 1H and 13C NMR spectroscopy. Within 24 h of heating, the change in the intensities of some peaks and the appearance of new peaks of NMR spectra permits to follow the reactions occurring in polybutadiene. The s...

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Veröffentlicht in:	Polymer degradation and stability 2011-07, Vol.96 (7), p.1255-1260
Hauptverfasser:	Hung, Nguyen Q., Sanglar, C., Grenier-Loustalot, M.F., Huong, Pham V., Cuong, Hoang N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analytical chemistry Applied sciences Bonding carbon Chemical reactions and properties Chemical Sciences Degradation Double bond migration Ene rearrangement Exact sciences and technology heat Heating HSQC NMR spectroscopy Migration NMR spectroscopy Nuclear magnetic resonance nuclear magnetic resonance spectroscopy Organic polymers Physicochemistry of polymers Polybutadiene Polybutadienes Spectra stable isotopes Thermal rearrangement reaction Two dimensional
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Zusammenfassung:	The thermal reactions of polybutadiene (PB) at 260 °C in inert atmosphere were followed by 1H and 13C NMR spectroscopy. Within 24 h of heating, the change in the intensities of some peaks and the appearance of new peaks of NMR spectra permits to follow the reactions occurring in polybutadiene. The sample, after heating for 6 h, was then characterized by a two dimensional HSQC NMR spectrum, showing the appearance of CH 3CH moiety, and the migration of double bond in polybutadiene. From these results the new mechanism of intra/intermolecular reactions was proposed.
ISSN:	0141-3910 1873-2321
DOI:	10.1016/j.polymdegradstab.2011.04.008