J. Kubo, INHIBITION OF RADIATION DEGRADATION BY HYDROGEN-DONATING HYDROAROMATICS, Industrial & engineering chemistry research, 32(8), 1993, pp. 1754-1759
The inhibiting effect of a multicomponent hydroaromatic type additive
(HHAP) produced from petroleum which showed prominent radical-scavengi
ng ability with DPPH (2,2-diphenyl-1-picrylhydrazyl) was tested agains
t the radiation degradation (gamma-ray in air at room temperature) of
mineral oil in comparison with the effect of a hindered phenolic antio
xidant, 2,6-di-tert-butyl-p-cresol (DBPC). The obvious effects of HHAP
on the restriction of the increases of acid value and carbonyl absorb
ance were preserved up to 2500 kGy. However, the structural changes th
at occurred in DBPC were shown by analyses of the carbonyl absorbance
and of the OH group absorbance by IR. DBPC itself was analyzed by gas
chromatography as the irradiation dose accumulated. The differences in
the inhibiting effects of a hindered phenolic antioxidant and HHAP be
tween the thermal oxidation and radiation degradation of polyolefins a
re discussed from these results. HHAP, which does not have a functiona
l group containing heteroatoms, can be considered to be resistant to r
adiation as well as to heat.