Attached
Two maleimide based antioxidants, an amine antioxidant
N-(4-anilinophenyl) maleimide and a phenolic antioxidant
N-(3,5 ditertiary butyl-4-hydroxy) phenyl maleimide were
synthesised. The stability of the antioxidants synthesised
were studied by volatility measurements.
N-(4-anilinophenyl) maleimide was reacted with natural
rubber in toluene at 8a
oe for 18 hours in the presence
of benzoyl peroxide as initiator. The efficiency of
binding under these conditions were studied by varying
the concentration of initiator and also the ratio of
antioxidant to rubber(isoprene units). Infra-red
spectroscopy was used for the estimation of the extent
of binding in each case.
The efficiency of the antioxidant synthesised was
evaluated by oxygen absorption measurements in cumene
o
at 100 e and also in vulcanized rubber.
