Chemical Properties Of Rubber

Approximately 40 to 60 percent of a tire is rubber.

Chemical properties of rubber.

A tire typically consists of four different kids of rubber. It s also tough tires resists water and chemicals gloves elastic rubber bands and much more. By convention mix formulations begin with the amount of the designated elastomer for instance natural rubber nr butadiene rubber br or styrene butadiene rubber sbr given as 100 parts by weight. The sulfur is important to the process because it enhances the rubber s elasticity and resistance to the damaging effects of higher or lower temperatures.

A number of ingredients are added to both natural and synthetic rubber in order to obtain certain desirable properties. Butadiene rubber synthetic rubber widely employed in tire treads for trucks and automobiles. Elasticity occurs because the chains can be stretched and the crosslinks cause them to spring back when the stress is released. Vulcanization or curing produces chemical links between the loosely coiled polymeric chains.

About 55 percent of a tire s rubber content is in the sidewall and tread and companies use natural styrene butadiene and. Rubber exhibits unique physical and chemical properties. It consists of polybutadiene an elastomer elastic polymer built up by chemically linking multiple molecules of butadiene to form giant molecules or polymers the polymer is noted for its high resistance to abrasion low heat buildup and resistance to cracking. Natural rubber is a polyterpene i e it consists of.

How it works states that during the vulcanization process rubber is treated with sulfur while being heated. The chemical structure of the elastomers provides them with an inherent hardness that can be altered. Named for its property as an eraser to rub out pencil marks rubber is widely used. Rubber is bouncy sure but that s just the start of its numerous properties.

Rubber rubber additives. Due to the presence of weakened allylic c h bonds in each repeat unit natural rubber is susceptible to vulcanisation as well as being sensitive to ozone cracking. Rubber s stress strain behavior exhibits the mullins effect and the payne effect and is often modeled as hyperelastic rubber strain crystallizes. Chemistry and properties all rubberlike materials.

To enhance the properties of rubber a process known as vulcanization is done. The modified hardness is then measured in terms of of durometer duro on a shore scale.