TY - JOUR
T1 - Observation of immobile regions in natural rubber at ambient temperature by solid-state C-13 CP/MAS NMR spectroscopy
AU - Larsen, F.H.
AU - Rasmussen, T.
AU - Pedersen, Walther Batsberg
AU - Nielsen, N.C.
AU - Jakobsen, H.J.
PY - 1999
Y1 - 1999
N2 - Employing C-13 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, gamma-irradiation, and increasing the temperature, slightly above the ambient, reduce the amount of immobile regions. (C) 1999 Elsevier Science Ltd. All rights reserved.
AB - Employing C-13 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, gamma-irradiation, and increasing the temperature, slightly above the ambient, reduce the amount of immobile regions. (C) 1999 Elsevier Science Ltd. All rights reserved.
KW - Nye funktionelle materialer
U2 - 10.1016/S0032-3861(99)00053-1
DO - 10.1016/S0032-3861(99)00053-1
M3 - Journal article
SN - 0032-3861
VL - 40
SP - 7013
EP - 7017
JO - Polymer
JF - Polymer
IS - 25
ER -