【摘 要】
：
IIR is a kind of rubber polymerized by isobutylene and a little isoprene with such performances as good airtightness, heat resistance, aging resistance, acid-al
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IIR is a kind of rubber polymerized by isobutylene and a little isoprene with such performances as good airtightness, heat resistance, aging resistance, acid-alkali resistance, ozone resis- tance, solvent resistance, electric insulation, shock absorption and low water absorption, which is widely applied on the inner tubes, tire bags, vulcanized bladders, air barriers, sidewalls,
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