Difference between revisions of "Plastic"
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== Description == | == Description == | ||
| − | A general term for any natural or synthetic organic material that can be shaped and molded to form a product that retains its given shape. Natural plastics include [ | + | A general term for any natural or synthetic organic material that can be shaped and molded to form a product that retains its given shape. Natural plastics include [[natural%20resin|tree resins]], [[beeswax|beeswax]], [[gutta-percha|gutta-percha]], [[=horn|horn]], and [[clay|clay]]. Synthetic plastics were first made in the 19th century. [[celluloid|Celluloid]], patented in 1870, was the first to achieve commercial success. Plastics are used as substitutes for glass, metal and wood. They are classified as : |
| − | 1. [ | + | 1. [[thermoplastic|Thermoplastic]] - can be heated to soften then cooled to harden without changing its basic properties. Examples are: [[acetal%20resin|polyacetal]], as well as some [[acrylic%20resin|acrylics]], [[cellulose%20ester|cellulose esters]], [[fluorocarbon|fluorocarbons]], [[nylon%20resin|nylons]], [[polycarbonate|polycarbonate]], [[polyethylene|polyethylene]], [[polypropylene|polypropylene]], [[polystyrene|polystyrene]], and [[vinyl%20resin|vinyl resins]]. |
| − | 2. [ | + | 2. [[thermoset|Thermoset]] - once cured, it cannot be softened with heat or pressure. Examples are: [[epoxy|epoxy]], [[phenolic%20resin|phenolic resin]], as well as some [[polyurethane|polyurethanes]], [[polyester%20resin|polyesters]], [[=silicone|silicones]], and [[melamine%20resin|melamine]]. |
[[File:2004.2149-SC181327.jpg|thumb|'''MFA Acc. #:''' 2004.2149]] | [[File:2004.2149-SC181327.jpg|thumb|'''MFA Acc. #:''' 2004.2149]] | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 11:33, 6 January 2014
Description
A general term for any natural or synthetic organic material that can be shaped and molded to form a product that retains its given shape. Natural plastics include tree resins, Beeswax, Gutta-percha, horn, and Clay. Synthetic plastics were first made in the 19th century. Celluloid, patented in 1870, was the first to achieve commercial success. Plastics are used as substitutes for glass, metal and wood. They are classified as :
1. Thermoplastic - can be heated to soften then cooled to harden without changing its basic properties. Examples are: polyacetal, as well as some acrylics, cellulose esters, fluorocarbons, nylons, Polycarbonate, Polyethylene, Polypropylene, Polystyrene, and vinyl resins.
2. Thermoset - once cured, it cannot be softened with heat or pressure. Examples are: Epoxy, Phenolic resin, as well as some polyurethanes, polyesters, silicones, and melamine.
Synonyms and Related Terms
plástico (Esp.); plastique (Fr.); plastica (It.); plástico (Port.)
Comparisons
Physical Properties for Selected Thermoset Resins
Physical Properties for Selected Thermoplastic Resins
Physical Properties for Selected Thermoplastic Resins
General Characteristics of Polymers
Authority
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
- Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
- Sharon Blank, An introduction to plastics and rubbers in collections, Studies in Conservation, 35, 53-63, 1990
- Tom Rowland, Noel Riley, A-Z Guide to Cleaning, Conserving and Repairing Antiques, Constable and Co., Ltd., London, 1981