Polymers and Resins
Polymers are large molecules made up of multiple monomers, molecules that combine repeatedly with themselves or other monomers (copolymers). Dimers, trimers, and tetramers are made up of two, three, and four monomers, respectively. Any molecule of five or more monomers is a polymer. For example, the styrene monomer (C6H5CHCH2) readily polymerizes to make polystyrene (C6H5CHCH2)n where n denotes the number of repeating monomeric units, which in this case ranges between 2000 to 3000. Cellulose, (C6H10O5)n, a natural polymer, can consist of 3500 repeating units. High polymers are those with a molecular weight (the sum of the atomic weights of its constituents) of over 5000 or 6000. Polymers can be divided into those that occur naturally, those that are synthetic, and semisynthetics (manufacturing manipulations of natural cellulose and starches).
KeywordsNatural Rubber Polyester Resin Polystyrene Bead Organic Peroxide Polymeric Bead
Unable to display preview. Download preview PDF.
- 7CFR319.Foreign Quarantine Notices,Part 319, Title 7-Agriculture, Code of Federal Regulations; Office of the Federal Register, U.S. National Archives and Records Administration: WashingtonGoogle Scholar
- CEO.Concise Encyclopedia of Polymer Science and Engineering; Kroschwitzi, J.I., ed.; John Wiley & Sons: New York, 1990Google Scholar
- GOCT.Glossary of Chemical Terms; Hampel, Clifford A.; Van Nostrand Reinhold: 1982Google Scholar
- GOT.Glossary of Terms Relating to Rubber and Rubber-Like Material; American Society for Testing and Materials, 1956Google Scholar
- HCC.Hawley’s Condensed Chemical Dictionary,11th Edition; Sax, N. Irving and Lewis, Richard J., Sr.; Van Nostrand Reinhold: New York, 1987Google Scholar
- HOHM.Handbook of Hazardous Materials; Corn, Morton, ed.; Academic Press: San Diego, 1993Google Scholar
- MH14.Materials Handbook,14th Edition; Brady, George S., Clauser, Henry R. and Vaccari, John A.; McGraw-Hill: New York, 1997Google Scholar
- STRP.Standard Terminology Relating to Plastics,D 883–96; American Society for Testing and Materials, 1997Google Scholar
- STRPV.Standard Terminology Relating to Paint, Varnish, Lacquer, and Related Products,D 16–96a; American Society for Testing and Materials, 1996Google Scholar
- STRR.Standard Terminology Relating to Rubber,D 1566-ENGL; American Society for Testing and Materials, 1997Google Scholar
- WDO.Whittington’s Dictionary of Plastics; Carley, James F., ed.; Technomic Publishing: Lancaster, 1968Google Scholar