File Name: difference between natural and synthetic rubber .zip
A synthetic rubber is any artificial elastomer. They are polymers synthesized from petroleum byproducts. About million metric tons of rubbers are produced annually in the United States , and of that amount two thirds are synthetic.
Both natural and synthetic rubber are used in the production of a range of products from tires to footballs to the soles of sneakers. Most natural rubber is produced from a softwood tree native to Brazil, though several other species of trees and shrubs are sources of rubber as well. Synthetic rubber is produced artificially from polymers in different varieties to mimic the different properties of natural rubber. Natural rubber has a high tensile strength and is resistant to fatigue from wear such as chipping, cutting or tearing.
Rubber can be produced in two ways; either naturally or artificially. Both natural and synthetic rubber can be vulcanized, mostly with sulfur ; but on some special occasions, other agents are also used depending on the required properties.
The key difference between natural rubber and synthetic rubber is their origin. Both are polymers , but natural rubber is produced from the latex obtained from a tree, whereas synthetic rubber is an artificial polymer produced by using petroleum byproducts. They have different physical and chemical properties and their industrial applications vary depending on those properties. A large quantity of rubber is used to manufacture automobile tires.
Natural rubber is a polymer which is made from the sap collected from this rubber tree. After collecting the sap, it is exposed to air under the mild heat. The polymerization reaction is:. Natural rubber became economically valuable after the development of vulcanized rubber heating in the presence of sulfur by Charles Goodyear.
It gives a very good rubbery, durable and coherent texture. Synthetic rubber is an artificially produced polymer which is synthesized from petroleum byproducts.
Synthetic rubber also has many industrial applications similar to natural rubber; in the field of the automotive industry for tires, hoses, belts, flooring, doors, and windows. Compared to natural rubber, the notable benefit of synthetic rubber includes good oil and temperature resistance and the ability to produce a product with an extremely constant quality. The synthetic polymer produced from butadiene is considered as the most important synthetic rubber polymer. Natural Rubber: Natural rubber is a natural polymeric compound produced from the latex of Hevea brasiliensis.
It mainly contains poly-cis-isoprene and some trace impurities such as proteins and dirt. Synthetic Rubber: Synthetic rubber is a man-made polymeric material which is produced by the polymerization of various petroleum-based precursors which are known as monomers. The most commonly available synthetic rubber material is styrene-butadiene, synthesized from the copolymerization of styrene and 1,3-butadiene.
Some of the other synthetic rubber polymers are produced by polymerization of monomers such as isoprene 2-methyl-1,3-butadiene , chloroprene 2-chloro-1,3-butadiene , and isobutylene methylpropene by adding a small quantity of isoprene for cross-linking.
These polymers are mixed with some other monomers in different proportions to change their physical, chemical and mechanical properties.
Natural Rubber: Natural rubber is a high molecular weight polymeric material and an elastomer with viscoelastic properties.
It is insoluble in many solvents such as water, alcohol, acetone, dilute acids and alkalis. But, it is soluble in ether, carbon disulfide, carbon tetrachloride, petrol, and turpentine. Raw natural rubber possesses low tensile strength and abrasion resistant. Synthetic Rubber: There is a huge range of synthetic rubber varieties, and their properties vary from one type to another.
Some of the most important synthetic rubbers along with their properties are listed below. Coming from Engineering cum Human Resource Development background, has over 10 years experience in content developmet and management. Leave a Reply Cancel reply.
Oil and fuel resistant, good heat distortion temperature properties, abrasion resistant. Low permeability to gases, resistant to aging, ozone and chemicals, good mechanical properties, abrasion resistant, good electrical insulation properties.
What are the differences between natural rubber vs synthetic rubber? Natural rubber is produced naturally from the native Brazilian plant Hevea brasiliensis. Synthetic rubber is artificially produced from a variety of polymers which provides the rubber its properties. The most commonly referred to synthetic rubber is synthetic polyisoprene abbreviated IR , created as a synthetic alternative to natural rubber. As such, natural rubber and synthetic polyisoprene share many similarities in physical properties.
Natural rubber is the outcome of dried natural rubber latex which has been compounded and processed. The chemical structure of natural rubber is very similar to that of natural rubber latex. Specific manufacturing techniques can alter the physical properties of natural rubber to suit certain specifications such as dimensions and tightness. Natural rubber latex is the white sap that comes from the rubber producing tree, hevea brasiliensis. This forms the basis of all rubber based products although specific refinements and compounding processes transform it into varying physically altered specifications. Natural rubber latex has extreme elongation, tear resilient and durability properties. Synthetic rubber is the term for artificially moderated rubber which has been mainly synthesised from petroleum by products.
Rubber is an example of an elastomer type polymer, where the polymer has the ability to return to its original shape after being stretched or deformed. The rubber polymer is coiled when in the resting state. The elastic properties arise from the its ability to stretch the chains apart, but when the tension is released the chains snap back to the original position. The majority of rubber polymer molecules contain at least some units derived from conjugated diene monomers see Polymerization of Conjugated Dienes. Most if not practically all such dienes undergo 1,4-addition to the polymer chain, where 1 and 4 refer to the 1st and 4th carbons of the backbone unit, which become single-bonded to the rest of the polymer chain. The diene's double bonds turn into single bonds, and the single bond between them turns into a Z or E configured double bond, depending on the polymerization conditions.
The main difference between natural rubber and synthetic rubber is that natural rubber is a natural biosynthesis polymer obtained from a plant.
The importance of the rubber industry from the time it came into being and the role that it has played in the growth of civilization has been enormous. There are two types of rubbers; natural and synthetic. Synthetic rubber is easier to produce than natural rubber, and has a wider range of applications. This ScienceStruck article gives you a comparison between synthetic rubber and natural rubber. Natural rubber is an elastomer elastic hydrocarbon polymer , that is made from latex, which is a milky colloid obtained from many plants. An elastomer is a substance which can undergo much more elastic deformation under stress than most materials and still retain its previous size without any deformation. The commercial source of natural rubber is the native Brazilian plant, Hevea brasiliensis, which belongs to the family, Euphorbiaceae.
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Natural rubber is produced naturally from the native Brazilian plant Hevea brasiliensis. Synthetic rubber is artificially produced from a variety of polymers which provides the rubber its properties.
Natural and Synthetic Rubber Dr. Natural Rubber Introduction The natural rubber NR presently used by industry is obtained by tapping the sap known as Latex, from the large forest tree Hevea Brasiliensis, which occurs in the southern equatorial region of America. By the end of eighteenth century the properties of rubber as obtained from the Hevea tree available at that time entirely in the forest of Amazon valley, were known throughout Europe. The Europeans found that by systematically tapping the tree, the latex can be extracted regularly. With the development of plantation in the Far East, it was found that latex could be preserved by adding ammonia to it immediately after it is collected.
Rubber can be produced in two ways; either naturally or artificially. Both natural and synthetic rubber can be vulcanized, mostly with sulfur ; but on some special occasions, other agents are also used depending on the required properties. The key difference between natural rubber and synthetic rubber is their origin. Both are polymers , but natural rubber is produced from the latex obtained from a tree, whereas synthetic rubber is an artificial polymer produced by using petroleum byproducts.
Уже на середине комнаты она основательно разогналась. За полтора метра до стеклянной двери Сьюзан отпрянула в сторону и зажмурилась. Раздался страшный треск, и стеклянная панель обдала ее дождем осколков.
Дайте немножко денег, чтобы я могла вернуться домой. Я вам все верну. Беккер подумал, что деньги, которые он ей даст, в конечном счете окажутся в кармане какого-нибудь наркоторговца из Трианы.
Возможно ли. Информация, которую он выдал. Если Стратмор получил от Следопыта информацию, значит, тот работал. Она оказалась бессмысленной, потому что он ввел задание в неверной последовательности, но ведь Следопыт работал. Но Сьюзан тут же сообразила, что могла быть еще одна причина отключения Следопыта.
Не советую тебе так себя вести, парень, - тихо сказал Беккер. - Я тебя предупредил! - кипятился панк. - Это мой столик. Я прихожу сюда каждый вечер.
Я искренне верю, что только мы можем спасти этих людей от их собственного невежества.
Проклятые испанцы начинают службу с причастия. ГЛАВА 92 Сьюзан начала спускаться по лестнице в подсобное помещение. Густые клубы пара окутывали корпус ТРАНСТЕКСТА, ступеньки лестницы были влажными от конденсации, она едва не упала, поскользнувшись. Она нервничала, гадая, сколько еще времени продержится ТРАНСТЕКСТ.
Не могу с ним не согласиться, - заметил Фонтейн. - Сомневаюсь, что Танкадо пошел бы на риск, дав нам возможность угадать ключ к шифру-убийце. Сьюзан рассеянно кивнула, но тут же вспомнила, как Танкадо отдал им Северную Дакоту. Она вглядывалась в группы из четырех знаков, допуская, что Танкадо играет с ними в кошки-мышки.
- Вы отправили его в Испанию? - В ее голосе послышались сердитые нотки. - Зачем. Стратмор казался озадаченным.
Повсюду в старинных домах отворялись ворота, и люди целыми семьями выходили на улицы. Подобно крови, бегущей по жилам старого квартала Санта-Крус, они устремлялись к сердцу народа, его истории, к своему Богу, своему собору и алтарю. Где-то в уголке сознания Беккера звонили колокола.
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