Chemical Properties Of Rubber

Rubber exhibits unique physical and chemical properties.

Chemical properties of rubber.

About 55 percent of a tire s rubber content is in the sidewall and tread and companies use natural styrene butadiene and. Chemistry and properties all rubberlike materials. A number of ingredients are added to both natural and synthetic rubber in order to obtain certain desirable properties. The chemical structure of the elastomers provides them with an inherent hardness that can be altered.

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. Shore a is used for a soft to medium hard rubber. Vulcanization or curing produces chemical links between the loosely coiled polymeric chains. 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.

It s also tough tires resists water and chemicals gloves elastic rubber bands and much more. Elasticity occurs because the chains can be stretched and the crosslinks cause them to spring back when the stress is released. The article explains these properties of rubber in detail. 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. Rubber s stress strain behavior exhibits the mullins effect and the payne effect and is often modeled as hyperelastic rubber strain crystallizes. Butadiene rubber synthetic rubber widely employed in tire treads for trucks and automobiles. How it works states that during the vulcanization process rubber is treated with sulfur while being heated.

Rubber rubber additives. Approximately 40 to 60 percent of a tire is rubber. Rubber is bouncy sure but that s just the start of its numerous properties. Natural rubber is a polyterpene i e it consists of.

Natural rubber styrene butadiene rubber polybutadiene rubber and butyl rubber. 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.