Inelastic Neutron Scattering From Filled Elastomers
A Nakatani, R Ivkov, P Papanek, H Yang, M Gerspacher
Inelastic neutron scattering experiments such as filter analyzer spectroscopy and time-of flight spectroscopy are powerful techniques for evaluating local molecular dynamics. These methods do not require isotopic labeling of the sample and therefore have a distinct advantage over small angle neutron scattering. An overview of these experimental techniques will be presented and neutron filter analyzer and time-of-flight spectroscopy methods will be used to characterize the local dynamics of polymers in the presence and absence of fillers. Of particular interest is the comparison between bound rubber attached to the filler surface and the pure, unbound rubber. A commercial synthetic polyisoprene containing nearly 100% cis-1,4 isomers was compounded with three different carbon blacks (N299, G299 (graphitized N299), and N762). Soxhlet extraction on each of the samples was performed so that corresponding samples containing purely bound rubber with filler were obtained. The filter analyzer and time-of flight spectra show distinct differences between the bound and pure rubber as well as differences based on carbon black type. Correlation of the spectral differences to the type of carbon black and initial concentration of carbon black will be discussed.
, Ivkov, R.
, Papanek, P.
, Yang, H.
and Gerspacher, M.
Inelastic Neutron Scattering From Filled Elastomers, Rubber Chemistry and Technology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851642
(Accessed February 24, 2024)