Fig. 5 Correlation between LSO self-diffusion and Tail
T2 at 25, 40, 60, 80, 100, 120oC
during 168 h. (25 and 40oC designated as Slow Ox and
60, 80, 100, 120oC designated as Rapid Ox)
In summary we have shown that the T2 (spin-spin)
transversal relaxation time of the alkyl chain tail reflects the
chemical and structural changes occurring during LSO aging via a thermal
autoxidation process. In effect, T2 can be correlated to
the kinetics of oxidation as influenced by the temperature, and can be
correlated as we show, to chemical changes such as covalent crosslinking
polymerization, and peroxide and aldehyde formation and changes in
component concentrations such as PUFA, MUFA and SAT) and different
material properties such as viscosity and diffusivity.