Matches in SemOpenAlex for { <https://semopenalex.org/work/W1969131508> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W1969131508 endingPage "2503" @default.
- W1969131508 startingPage "2497" @default.
- W1969131508 abstract "The environmental and accelerated photodegradation of two polypropylene (PP) films (high and low crystallinity) were investigated. FT-IR measurements coupled with derivatization reactions (NO and SF4), elongation at break tests and gel permeation chromatography technique were used to monitor the degree of oxidation during the UV exposure. No stoichiometry changes were observed under both UV conditions for the PP films. The dominant photoproduct, i.e., ketone, was suggested to be produced from peroxy radicals. The low concentration of tert-alcohol detected questioned the validity of its formation from hydroperoxide decomposition as suggested by several authors. Under natural exposure, the effect of degradation on mechanical property was different for high and low PP. High PP was useless after a short exposure time; low PP retained its physical property for a longer period of time. In the latter case, the analysis of the changes in elongation at break, the polydispersity P = Mw/Mn, the number of chain scissions Nt, and the kinetic accumulation of photoproducts provided strong indications on the mechanisms of acid and ester production and shed some light on the competition between crosslinking and chain scission reactions. The estimated acceleration factors were 7.5 and 8.5 for high and low PP, respectively, values that were much lower than those obtained for linear low-density polyethylene. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2497–2503, 1997" @default.
- W1969131508 created "2016-06-24" @default.
- W1969131508 creator A5000035934 @default.
- W1969131508 date "1997-06-27" @default.
- W1969131508 modified "2023-10-18" @default.
- W1969131508 title "Photooxidation of polypropylene under natural and accelerated weathering conditions" @default.
- W1969131508 doi "https://doi.org/10.1002/(sici)1097-4628(19970627)64:13<2497::aid-app3>3.0.co;2-8" @default.
- W1969131508 hasPublicationYear "1997" @default.
- W1969131508 type Work @default.
- W1969131508 sameAs 1969131508 @default.
- W1969131508 citedByCount "76" @default.
- W1969131508 countsByYear W19691315082012 @default.
- W1969131508 countsByYear W19691315082013 @default.
- W1969131508 countsByYear W19691315082014 @default.
- W1969131508 countsByYear W19691315082015 @default.
- W1969131508 countsByYear W19691315082016 @default.
- W1969131508 countsByYear W19691315082017 @default.
- W1969131508 countsByYear W19691315082018 @default.
- W1969131508 countsByYear W19691315082019 @default.
- W1969131508 countsByYear W19691315082020 @default.
- W1969131508 countsByYear W19691315082022 @default.
- W1969131508 countsByYear W19691315082023 @default.
- W1969131508 crossrefType "journal-article" @default.
- W1969131508 hasAuthorship W1969131508A5000035934 @default.
- W1969131508 hasConcept C112950240 @default.
- W1969131508 hasConcept C124681953 @default.
- W1969131508 hasConcept C127413603 @default.
- W1969131508 hasConcept C139066938 @default.
- W1969131508 hasConcept C159985019 @default.
- W1969131508 hasConcept C161790260 @default.
- W1969131508 hasConcept C162356407 @default.
- W1969131508 hasConcept C162847780 @default.
- W1969131508 hasConcept C178790620 @default.
- W1969131508 hasConcept C185592680 @default.
- W1969131508 hasConcept C188027245 @default.
- W1969131508 hasConcept C192562407 @default.
- W1969131508 hasConcept C2776923573 @default.
- W1969131508 hasConcept C2777973245 @default.
- W1969131508 hasConcept C33947775 @default.
- W1969131508 hasConcept C42360764 @default.
- W1969131508 hasConcept C43617362 @default.
- W1969131508 hasConcept C46275449 @default.
- W1969131508 hasConcept C521977710 @default.
- W1969131508 hasConcept C63179538 @default.
- W1969131508 hasConcept C65024703 @default.
- W1969131508 hasConcept C65165184 @default.
- W1969131508 hasConceptScore W1969131508C112950240 @default.
- W1969131508 hasConceptScore W1969131508C124681953 @default.
- W1969131508 hasConceptScore W1969131508C127413603 @default.
- W1969131508 hasConceptScore W1969131508C139066938 @default.
- W1969131508 hasConceptScore W1969131508C159985019 @default.
- W1969131508 hasConceptScore W1969131508C161790260 @default.
- W1969131508 hasConceptScore W1969131508C162356407 @default.
- W1969131508 hasConceptScore W1969131508C162847780 @default.
- W1969131508 hasConceptScore W1969131508C178790620 @default.
- W1969131508 hasConceptScore W1969131508C185592680 @default.
- W1969131508 hasConceptScore W1969131508C188027245 @default.
- W1969131508 hasConceptScore W1969131508C192562407 @default.
- W1969131508 hasConceptScore W1969131508C2776923573 @default.
- W1969131508 hasConceptScore W1969131508C2777973245 @default.
- W1969131508 hasConceptScore W1969131508C33947775 @default.
- W1969131508 hasConceptScore W1969131508C42360764 @default.
- W1969131508 hasConceptScore W1969131508C43617362 @default.
- W1969131508 hasConceptScore W1969131508C46275449 @default.
- W1969131508 hasConceptScore W1969131508C521977710 @default.
- W1969131508 hasConceptScore W1969131508C63179538 @default.
- W1969131508 hasConceptScore W1969131508C65024703 @default.
- W1969131508 hasConceptScore W1969131508C65165184 @default.
- W1969131508 hasIssue "13" @default.
- W1969131508 hasLocation W19691315081 @default.
- W1969131508 hasOpenAccess W1969131508 @default.
- W1969131508 hasPrimaryLocation W19691315081 @default.
- W1969131508 hasRelatedWork W1984830557 @default.
- W1969131508 hasRelatedWork W2049490462 @default.
- W1969131508 hasRelatedWork W2086104542 @default.
- W1969131508 hasRelatedWork W2093160735 @default.
- W1969131508 hasRelatedWork W2187267949 @default.
- W1969131508 hasRelatedWork W2388787542 @default.
- W1969131508 hasRelatedWork W2402303230 @default.
- W1969131508 hasRelatedWork W2800678416 @default.
- W1969131508 hasRelatedWork W3119593865 @default.
- W1969131508 hasRelatedWork W3195355668 @default.
- W1969131508 hasVolume "64" @default.
- W1969131508 isParatext "false" @default.
- W1969131508 isRetracted "false" @default.
- W1969131508 magId "1969131508" @default.
- W1969131508 workType "article" @default.