| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,918,266,609 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
polyphosphoric acid |
Also found in: Acronyms, Encyclopedia | 0.01 sec. |
|
|
polyphosphoric acid [ˌpɒlɪfɒsˈfɒrɪk]
n
1. (Chemistry / Elements & Compounds) any one of a series of oxyacids of phosphorus with the general formula Hn+2PnO3n+1. The first member is pyrophosphoric acid (n = 2) and the series includes the highly polymeric metaphosphoric acid. The higher acids exist in an equilibrium mixture 2. (Chemistry / Elements & Compounds) a glassy or liquid mixture of orthophosphoric and polyphosphoric acids: used industrially as a dehydrating agent, catalyst, and oxidizing agent ThesaurusLegend: Synonyms Related Words Antonyms
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Mentioned in | ? | References in periodicals archive | ? | Dictionary browser | ? | Full browser | ? | |||
|---|---|---|---|---|---|---|---|---|---|---|
Specifically, it is added to flame retardants, because they change as a result of high temperature thermal decomposition into polyphosphoric acid, (1), (2) which forms a heat resistant carbonaceous protective layer and interferes with the transport of oxygen to the burning zone. Keywords: Polyphosphoric acid (PPA), Acylation reactions, Fries rearrangement, Hydroxyaryl Ketones, Phenol derivatives. The flame retardancy mechanisms of RP have been described as follows: the oxidation of RP first occurs with increasing temperature, then the produced oxide reacts with the water from decomposed polymer to produce metaphosphoric acid, phosphoric acid, and polyphosphoric acid, which can cover the surface of the burning materials by a liquid film, and further promote the dehydration of polymers to form a stable char layer. |
polyphosphoric acid |
Polyphonic ring tone Polyphonic ringtone Polyphonic ringtone Polyphonic ringtones Polyphonic ringtones Polyphonic Singing Polyphonic stratification Polyphonic stratification polyphonically polyphonically polyphonies polyphonies Polyphonism Polyphonist Polyphonist polyphonists polyphonists polyphonous polyphonous polyphonously polyphonously polyphony polyphony Polyphony (literature) Polyphore polyphosphate polyphosphate polyphosphates polyphosphates Polyphosphazene polyphosphoric acid Polyphotalpolyphrasia Polyphthalamide polyphyletic polyphyletic polyphyletically polyphyletically Polyphylla Fullo Polyphyllous Polyphyly Polyphyly polyphyodont polyphyodont polyphyodonty Polyphyony Polyphyony Polypi Polypi Polypide Polypide Polypidom Polypier Polypifera Polypiferous Polypill Polypiparous Polypite Polyplacophora Polyplacophora Polyplacophoran | ||||||||
| Dictionary, Thesaurus, and Translations |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|