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Published on June 28, 2013

How rubber content affects tire pressure

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The inflation pressure impacts tire and vehicle performance: rolling resistance, treadwear, handling and durability. Reducing tire inflation pressure loss rates, as
measured by the percent of air lost per month, is a key parameter to improving tire performance. Copolymers based on polyisobutylene are notable for their low permeability to small-molecule diffusants as a result of their efficient intermolecular packing. Halobutyl rubber, both bromobutyl and chlorobutyl, is the polymer of choice in the innerliner compound because of its excellent air and moisture impermeability and excellent flex-fatigue and age resistance.