Matches in SemOpenAlex for { <https://semopenalex.org/work/W2493708276> ?p ?o ?g. }
Showing items 1 to 70 of
70
with 100 items per page.
- W2493708276 endingPage "197" @default.
- W2493708276 startingPage "175" @default.
- W2493708276 abstract "Amorphous and semi-crystalline polypropylene samples were pyrolyzed in He from 388°-438°C and in air from 240°-289°C. A novel interfaced pyrolysis gas chromatographic peak identification system was used to analyze the products on-the-fly; the chemical structures of the products were determined also by mass spectrometry. Pyrolysis of polypropylene in He has activation energies of 5-1-56 kcal mol-1 and a first-order rate constant of 10-3 sec-1 at 414°C. The olefinic products observed can be rationalized by a mechanism involving intramolecular chain transfer processes of primary and secondary alkyl radicals, the latter being of greater importance. Oxidative pyrolysis of polypropylene has an activation energy of about 16 kcal mol-1; the first-order rate constant is about 5 X 10-3 sec-1 at 264°C. The main products aside from CO2, H2O, acetaldehyde, and hydrocarbons are ketones. A simple mechanistic scheme has been proposed involving C-C scissions of tertiary alkoxy radical accompanied by H transfer, which can account for most of the observed products. Similar processes for secondary alkoxy radicals seem to lead mainly to formaldehyde. Differences in pyrolysis product distributions reported here and by other workers may be attributed to the rapid removal of the products by the carrier gas in our our experiments." @default.
- W2493708276 created "2016-08-23" @default.
- W2493708276 creator A5056059025 @default.
- W2493708276 creator A5059069971 @default.
- W2493708276 date "1978-06-01" @default.
- W2493708276 modified "2023-09-26" @default.
- W2493708276 title "Pyrolysis and Oxidative Pyrolysis of Polypropylene" @default.
- W2493708276 doi "https://doi.org/10.1021/ba-1978-0169.ch015" @default.
- W2493708276 hasPublicationYear "1978" @default.
- W2493708276 type Work @default.
- W2493708276 sameAs 2493708276 @default.
- W2493708276 citedByCount "11" @default.
- W2493708276 crossrefType "book-chapter" @default.
- W2493708276 hasAuthorship W2493708276A5056059025 @default.
- W2493708276 hasAuthorship W2493708276A5059069971 @default.
- W2493708276 hasConcept C121332964 @default.
- W2493708276 hasConcept C139066938 @default.
- W2493708276 hasConcept C148898269 @default.
- W2493708276 hasConcept C161790260 @default.
- W2493708276 hasConcept C178790620 @default.
- W2493708276 hasConcept C185592680 @default.
- W2493708276 hasConcept C2775930285 @default.
- W2493708276 hasConcept C2777595113 @default.
- W2493708276 hasConcept C2777973245 @default.
- W2493708276 hasConcept C2780161600 @default.
- W2493708276 hasConcept C2780263894 @default.
- W2493708276 hasConcept C36759035 @default.
- W2493708276 hasConcept C62520636 @default.
- W2493708276 hasConcept C65024703 @default.
- W2493708276 hasConcept C75079739 @default.
- W2493708276 hasConcept C90150868 @default.
- W2493708276 hasConcept C93391505 @default.
- W2493708276 hasConcept C95121573 @default.
- W2493708276 hasConceptScore W2493708276C121332964 @default.
- W2493708276 hasConceptScore W2493708276C139066938 @default.
- W2493708276 hasConceptScore W2493708276C148898269 @default.
- W2493708276 hasConceptScore W2493708276C161790260 @default.
- W2493708276 hasConceptScore W2493708276C178790620 @default.
- W2493708276 hasConceptScore W2493708276C185592680 @default.
- W2493708276 hasConceptScore W2493708276C2775930285 @default.
- W2493708276 hasConceptScore W2493708276C2777595113 @default.
- W2493708276 hasConceptScore W2493708276C2777973245 @default.
- W2493708276 hasConceptScore W2493708276C2780161600 @default.
- W2493708276 hasConceptScore W2493708276C2780263894 @default.
- W2493708276 hasConceptScore W2493708276C36759035 @default.
- W2493708276 hasConceptScore W2493708276C62520636 @default.
- W2493708276 hasConceptScore W2493708276C65024703 @default.
- W2493708276 hasConceptScore W2493708276C75079739 @default.
- W2493708276 hasConceptScore W2493708276C90150868 @default.
- W2493708276 hasConceptScore W2493708276C93391505 @default.
- W2493708276 hasConceptScore W2493708276C95121573 @default.
- W2493708276 hasLocation W24937082761 @default.
- W2493708276 hasOpenAccess W2493708276 @default.
- W2493708276 hasPrimaryLocation W24937082761 @default.
- W2493708276 hasRelatedWork W1783219430 @default.
- W2493708276 hasRelatedWork W2045000906 @default.
- W2493708276 hasRelatedWork W2055879333 @default.
- W2493708276 hasRelatedWork W2064796762 @default.
- W2493708276 hasRelatedWork W2126830134 @default.
- W2493708276 hasRelatedWork W2319665472 @default.
- W2493708276 hasRelatedWork W2354468303 @default.
- W2493708276 hasRelatedWork W3024973685 @default.
- W2493708276 hasRelatedWork W4248123235 @default.
- W2493708276 hasRelatedWork W287856896 @default.
- W2493708276 isParatext "false" @default.
- W2493708276 isRetracted "false" @default.
- W2493708276 magId "2493708276" @default.
- W2493708276 workType "book-chapter" @default.