Evaluation of Some Conducting Polymers as Novel Antioxidants for Rubber Vulcanizates

Table 7

Retained stress and strain at rupture for NR and SBR vulcanizates containing the commercial antioxidants P𝛽N, TMQ and prepared polymers of P(An-co-T) and PT after exposure to UV irradiation for 72 hr.

Formulation property	NR vulcanizates					SBR vulcanizates
	Control	P𝛽N	TMQ	P(An-co-T)	PT	Control	P𝛽N	TMQ	P(An-co-T)	PT
	10	11	12	13	14	15	16	17	18	19
Ret. stress at rupt., % after 72 hr UV exposure	89	98	100	100	100	90	99	93	100	100
Ret. strain at rupt., % after 72 hr UV exposure	90	98	100	100	100	91	99	94	100	100