... their properties and describe how vulcanising rubber leads to an improvement in its properties for use in car tires 3.Natural rubber has a thermoplastic nature and consequently it is not suitable for being used independently to construct a tyre. Therefore it is necessary that a tyre must be have specific chemicals and synthetic fibres added in order to improve the suitability of rubber being used as car tyres. Rubbers 55% Carbon Black 26% Oils 8% Resins 5% Curing Agents 4% Anti-ageing chemicals 2% Composition, by weight, of a typical tyre rubber formation The adding of each of these additives has many advantages. Firstly carbon black is added to increase the strength of the tyre and also to increase the abrasion, cut and tear resistance of a tyre, thus extending the lifetime of a tyre. Oils and resins are also used ad additives, and these carry three duties, firstly to improve process during manufacture, secondly to lower the cost and thirdly to improve ...

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