| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,515,198,942 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
polymerization |
Also found in: Medical, Wikipedia, Hutchinson | 0.64 sec. |
polymerizationAny process in which monomers combine chemically to produce a polymer. The monomer molecules—which in the polymer usually number from at least 100 to many thousands—may or may not all be the same. In nature, enzymes carry out polymerization under ordinary conditions to form proteins, nucleic acids, and carbohydrate polymers; in industry, the reaction is usually done with a catalyst, often under high pressure or heat. In addition polymerization, monomers are added successively to the reactive ends of a growing polymer molecule, similar to adding links to a chain; during the reactions, no by-products are formed. In condensation polymerization, growth of the polymer advances stepwise—monomers having reactive functional groups combine into larger molecules with their own functional groups; each reaction splits off a small molecule, often water, as a by-product. polymerization, polymerisation the act or process of forming a polymer or copolymer, esp a chemical reaction in which a polymer is formed How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
The polymerization reaction starts as the mixture enters the mold. This addition type polymerization reaction is unique among the foundry resins in that it occurs quickly, and nearly simultaneously through the sand mass. The process uses thermoplastics such as polycarbonate and polyetherimides, which engineers can reshape with heat treatments even after the initial polymerization reaction. |
| Encyclopedia |
| Free Tools: |
For surfers:
Browser extension |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|