Observation of immobile regions in natural rubber at ambient temperature by solid-state 13 C CP/MAS NMR spectroscopy
1999; Elsevier BV; Volume: 40; Issue: 25 Linguagem: Inglês
10.1016/s0032-3861(99)00053-1
ISSN1873-2291
AutoresFlemming H. Larsen, T. Rasmussen, Walther Batsberg Pedersen, Niels Chr. Nielsen, Hans J. Jakobsen,
Tópico(s)Advanced MRI Techniques and Applications
ResumoEmploying 13C CP/MAS NMR spectroscopy, the existence of immobile regions in natural rubber (cis-1,4-polyisoprene) corresponding to a few percent of the monomer units has been detected at ambient temperature. For synthetic rubbers no immobile regions have been detected at all. Applying different physical and chemical treatments to natural rubber it is shown that mastication, γ-irradiation, and increasing the temperature, slightly above the ambient, reduce the amount of immobile regions.
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