isobutylene mach amounts isoprene DeSDu' 'eS Hat je (-98 [taH ~-103 [taH) elastomers aggregation. 'a ghIH chonaDmo', cha'logh vaj bonds qub. saturation mach wej, vulcanization rubber QIt, 'ach corrosion 'ej aging. ngI' molecular unsaturated weghbogh 1.6 vatlhvI' ~2.0 vatlhvI' butyl rubber, vulcanization speed, largest amount butyl rubber.
chIS, bIr flow, relative ghu'vetlh 091 Hoch ~ 0.92 molecular ngI' 3w 'ej ~ 8.5w 'ej wochbogh qut.
1, QaQ permeability. jejlaw' tightness nIvbogh Hoch rubber, 8 poH poH veb puS natural rubber.
2, jen chemical stability. 'eS unsaturation, pov tuj aging resistance, resistance, qantaHvIS especially ozone 'ej pey corrosion. jen ozone resistance puS NR 10. freezing 'oHbe' bIr qut, QaQ. tg-73. QI'yaH-polar, alcohols 'ej polar taS such as swelling ketones mach. 'ach not hydrocarbon solvents.
3, QaQ electrical bang. absorption 'ej 'eS net poQbej puS Sa' synthetic rubber, bIQ electrical insulation 'ej corona resistance. laH lo' law' Hap 'u' insulating. muq resistance porghDaj moH 1016 ω. cm, 10 ~ 100 poH veb puS motlhbogh rubber synthetic
4, QaQ yay' absorption. 'eS elasticity 'ej laH yay' absorb. legh ngechvetlh 30 [taH ~-+50 [taH, ghaH QaQ yay' absorption.
disadvantages:
1, vIvup yIqaw, slow vor, not nujDajvo' latlh rubber. vIvup adhesion 'ej resistance oil. tuj pIm vI'elta'bogh, elastic DeSDu' pa' Hat 'eS.
application:
Qo'noS manufacture inner tubes, bIQ bag, airbag, woj-tob pogh, products je jen SIp tightness requirements. chemical corrosion-resistant chom wire cable 'ej insulation cortex 'ej outsourcing. gaskets ngaQ Sar tuj 'ej bIQ resistance 'ej yay'-absorbing cushion Hap 'u'
modified:
halogen modification chel. butyl rubber, chlorinated brominated QIt solved 'ej chepHa' adhesion disadvantages. QamchoHmo' jIblIj Hoch tlhegh je NR ghap sbr ghap cr, tightness jejlaw' Dunmo', ozone 'ej chemical corrosion resistance 'ej mechanical bang.
