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Essay

Thermoplastics and Injection Molding

Essay specific features

 

Issue:

Science

 

Written by:

Jung M

 

Date added:

July 19, 2012

 

Level:

University

 

Grade:

A

 

No of pages / words:

8 / 2228

 

Was viewed:

2368 times

 

Rating of current essay:

 
Essay content:

Thermoplastic polymers differ from thermosetting polymers (Bakelite; vulcanized rubber) which once formed and cured, can never be remelted and remolded. Many thermoplastic materials are addition polymers; e.g., vinyl chain-growth polymers such as polyethylene, polyvinyl chloride and polypropylene, and others like polystyrene, polyester, acrylics, nylons and cellulosics Thermoplastics can be melted and re-molded, and thus they can be recycled...
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This also means that they can be farbricated by processes that use plastic flow. Injection Molding is one such process. History of Thermoplastics ? 1868 - John Wesley Hyatt injection molds Celluloid billiard balls. ? 1926 - Vinyl or PVC - Walter Semon invented a plasticized PVC. ? 1936 - Acrylic or Polymethyl Methacrylate ? 1937 - Polyurethanes tradenamed Igamid for plastics materials and Perlon for fibers...
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General issues of this essay:
Thermoplastics and Injection Molding The Pearl: Material Society, Material Thoughts Material Society, Material Thoughts MATERIAL SOCIETY, MATERIAL THOUGHTS Scientific molding - ESTABLISHING A ROBUST INJECTION MOLDING PROCESS Injection Molding injection molding Injection Molding Husky Injection Molding Systems Material Girl material possessions Cie Indorsed Material Material Engineering Censorship From "obscene" Material Berkeley and material things
 

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