Usefulness of Polymer

• Natural Rubber

Monomer: isoprene.

Rubber from gum-tree (Havea Brasiliensis)

Grubber gum is called latex

Latex as colloid inside water that can be precipitated by formiat acid. Natural rubber has soft characteristic, elastic, and sticky at warm. Rubber can be hardened with change its bonding by use sulfur. Its bonding will become disulfide cross bonding. Process ini ditemukan oleh Charles Goodyear pada tahun 1884 dan disebut dengan vulkanisasi

• Synthetic Rubber

It was found at World War II to supply necessary of associate.

Example : Polibutadiene, polikloropropene, and SBR

• Polybutadiene

Monomer: butadiene

Monomers from polybutadiene alike natural rubber polymer but the characteristics different with natural rubber.

Polibutadiene is strongless

It is unresistance to oil

• Polycloropropene (Neoprena)

Monomer: 2-clouro-1,3-butadiene

Neoprene resistance to oil

Used to make membuat oil tube, and some goods like that.

• SBR

Monomer: stirena (25%) dan butadiena (75%)

The most popular and it is produced at large.

SBR can be vulcanized, non oxidation, and abrasion.

Used to tyre material.

• Polyetena (PE)

Characteristics: odourless, colourless, and non toxic.

Making by Polymerization etene with high pressur 2000 atm and 200oC

Soft Characteristic, elastic and has resistance to acid and base.

Polietilene consist of two type:

• High Density Polyetilen (HDPE)

Consist of sraight chain that have compact composition. So, the bonding is closely and physical characteristic is stuffy.

• Low Density Polyetilen (LDPE)

Consist of some unit chains that uncompact composition. So, the bonding is not compact and physic characteristic is elastic and the melting point is lower.

• Polypropelin

Monomer: propene.

Characteristic: resistance to acid/ base.

Usefullness:

As removal pipeline at industry of chemistry;

Washing machine, glass.

• Polyisobutilen

Monomer: metyl propene.

Characteristic: similar natural rubber,

Usefullness:

Glue material, bracelet rubber, karet gelang, car tyre, etc.

• Polystirena

Monomer: inner of benzene (vinil benzena = stirena)

Characteristics: solid and hard

Usefullness:

Making of plastic chair, body of plane, telephone radio, sterofoom, television, etc.

• Polyvinil Klorida (PVC)

Monomer: vinil clorida.

Characteristic: content clor group, so this material resistence to corrosion, but easy to broken at low temperature.

Usefullness: Plastic pipelines.

• Polyvinil Ester

Usefullness: Glue for: skin, paper, wood and Wall paint.

• Polyvinil Polihalida (TEFLON)

Monomer: tetra fluoro etene. (PTFE)

Characteristic: Resistance to heat and chemical material, panas dan bahan kimia, Grilledless.

Polytetra fluoro etene resistance at 200oC until + 300oC

Polytri fluoro etene at - 100oC until +250oC.

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