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Polymers (SYNTHETIC (Nitrile Rubber (Resistance to mineral oils, greater…
Polymers
NATURAL
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Examples
Cellulose
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Rigid, insoluble in water
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Starch
Polysaccharide produced by plants from CO2 and H2O, consists of amylase and amylopectin, provides 70-80% of calories consumed by humans.
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Applications
Preservative, art of our diet, stabilizer for foam, biodegradable alternative to polyestirene
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Silk
From silkworm "Bombyx mori" to form cocoon to become butterfly, natural fiber made of proteins
Applications
Parachutes, bycicle tires, surgical structure, fabric for clothes
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Natural rubber
Milky liquid flowing from the bark of the tree. It is a fundamental material because it has a high elasticity, resistance to water, acids , bases and it is electrically insulates . 
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SYNTHETIC
They are industrially obtained from certain monomers and are used in the manufacture of packaging for food products, drugs, appliances, tools,
Polystyrene
Thermoplastic. Electrical properties, optical clarity, thermal stability
Car coatings, cookware, toys.
Nitrile Rubber
Resistance to mineral oils, greater heat resistance and abrasion
Applications:Mangos high strength, car floor mats, heels,
shoes and protectors
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PVC
Thermoplastic.Draperies and guttering, windows, furniture, upholstery, coatings
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Polypropylene (PP)
Thermoplastic, thermic distortion resistance, fatigue resistance, inert
Home cleaning prods, car parts, baggage, home appliances.
Polyamide (Nylon)
Thermoplastic. Tensile strength, raincoat, noise and vibration damper, resistance to heat.
Nylon fibers, bristle brushes, parachute, guitar strings
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Polyacrylonitrile (PAN)
Thermoplastic. Light transmission, degradation resistance, low mechanical property. Takes the longest to degradate.
Wool fiber, blankets, glasses, aircraft windows.
Polyester
Thermostable. Electrical props, cheap cost of production.
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Connectors, pllugs, consoles, rugs, packaging resins, corded tires.
Natural vs Synthetic
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Natural fibers are found on creatures like sheep and silk worms, synthetic threads must be produced using laboratory procedures.
Natural materials are altered physically but are stil considered to be "natural". Sythetic materials are created in a lab.
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