8 th synthetic materials Þ Synthetic materials are kinds of materials obtained from the synthesis of chemicals. Þ The chemicals used for synthetic materials are obtained from petroleum and natural gas(methane) Þ Petroleum and natural gas is compound of hydrogen and oxygen called hydrocarbon. Þ Monomers are simple chemical molecules of hydrocarbon. Þ When monomers join end to end form a long chain of monomers called polymers. The process of the formation of polymers is called polymerization. Þ Cellulose [beet root] is polymers of glucose while Hemoglobin is polymers of amino acid. Þ Fibres are thin thread like materials used to prepared cloths. Þ Fibres obtained on mixing natural and synthetic fiber are called semi synthetic fibre. e.g. rayon Rayon Þ Rayon is synthetic fibres obtained from cellulose. Þ Rayon are of three types: Viscose Cupreammonium (cupro) and acetate rayons. Viscose Rayon Þ In ind
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