000			01399nam a2200217Ia 4500
008			220216s9999 xx 000 0 und d
100			_aThomas K T
245		0	_aEffect of process aids on engineering properties of natural rubber
260			_bIndian Journal of Natural Rubber Research _c1988
300			_a30-39
520			_aSix different process aids - naphthenic oil, paraffinic oil, aromatic oil, pine tar, white factice and CI resin - in natural rubber were evaluated for their effect on physical properties of vulcanizates, with special reference to those relevant to engineering applicationa. Creep, stress relaxation, set, hysteries, heat build-up and resilience were studied. It was found that naphthenic oil showed the optimum properties, where as CI resin gave the least desirable set of properties. These two process aids were further evaluated to study the effect of their concentration on properties. It was found that the engineering properties were improved by the addition of naphthenic oil upto 10 phr. However, CI resin showed abnormal behaviour. A rating of process aids was made as far as general engineering properties were concerned.
650			_aCreep
650			_aHeat build up
650			_aHysteresis
650			_aProcess aid
650			_aResilience
650			_aStress relaxation
700			_aKuriakose B
700			_aMathew N M
942			_cJS
999			_c58065 _d58065