FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2056548836> ?p ?o ?g. }

• W2056548836 endingPage "621" @default.
• W2056548836 startingPage "617" @default.
• W2056548836 abstract "The fluorescence spectra of amorphous atactic, amorphous isotactic and crystallized isotactic polystyrene films have been compared. The effect of chain orientation has also been analysed on amorphous atactic samples. The results show that the fluorescence yield increases with crystallinity at room temperature and 77°K. The contribution of excimer fluorescence at 77°K increases according to the sequence: atactic < atactic oriented < isotactic amorphous < isotactic crystallized. An increase of the fluorescence yield with crystallinity was also observed for polyvinylcarbazole samples although the contribution of excimer fluorescence at 77°K is independent of crystallinity for this polymer. The results are interpreted in terms of energy migration. Les spectres de fluorescence de polystyrène atactique amorphe, isotactique amorphe et isotactique cristallin ont été comparés. L'effet de l'orientation des chaînes a été analysé pour des échantillons atactiques amorphes. Les résultats montrent que le rendement de fluorescence augmente avec la cristallinité à température ordinaire et 77°K. La contribution de la fluorescence d'excimère à 77°K augmente selon la séquence: atactique < atactique orienté < isotactique amorphe < isotactique cristallin. Une augmentation du rendement de fluorescence avec la cristallinité a aussi été observée pour le polyvinylcarbazole alors que la contribution de la fluorescence d'excimère est indépendente de la cristallinité pour ce polymère. Les résultats sont interprétés en terme de migration d'énergie. Si sono comparati gli spettri di fluorescenza di pellicole di polistirene amorfo atattico, amorfo isotattico a cristallizzato isotattico. Su campioni amorfi atattici si è pure analizzato l'effetto dell'orientazione della catena. I risultati mostrano che la fluorescenza aumenta con la cristallinità a temperatura ambiente e a 77°K. La contribuzione alla fluorescenza eccimerica a 77°K aumenta secondo la seguente sequenza: atattico < atattico orientato < isotattico amorfo < isotattico cristallizzato. Per campioni di polivinilcarbazole si è pure osservato un aumento della fluorescenza con la cristallinità, sebbene la contribuzione della fluorescenza eccimerica a 77°K non dipenda, per questo polimero, dalla cristallinità. Si interpretano i risultati in termini di migrazione di energia. Die Fluoreszenzspektren amorpher-ataktischer, amorpher-isotaktischer und kristallisierter isotaktischer Polystyrolfilme sind verglichen worden. Auch wurde die Wirkung der Kettenorientierung auf amorphe, ataktische Proben. analysiert. Die Ergebnisse zeigen, daβ die Fluoreszenzausbeute mit Kristallinität bei Raumtemperatur und 77°K steigt. Der Beitrag von Excimer-Fluoreszenz, (kurzzeitige Dimerfluoreszenz) bei 77°K steigt gemäβ der Reinhenfolge: ataktisch < ataktisch orientiert < isotaktisch kristallisiert. Eine Steigerung des Fluorszenzertrages mit Kristallinität wurde auch bei Polyvinylkarbazolproben beobachtet, obgleich der Beitrag von Excimer-Fluoreszenz bei 77°K unabhängig von der Kristallinität für dieses Polymer ist. Die Ergebnisse werden im Sinne von Energiewanderung gedeutet." @default.
• W2056548836 created "2016-06-24" @default.
• W2056548836 creator A5015937286 @default.
• W2056548836 creator A5067123488 @default.
• W2056548836 creator A5083180506 @default.
• W2056548836 date "1974-07-01" @default.
• W2056548836 modified "2023-09-22" @default.
• W2056548836 title "Luminescence studies in polymers—IV. Effect of orientation, tacticity and crystallinity on polystyrene and polyvinylcarbazole fluorescence" @default.
• W2056548836 cites W1570251193 @default.
• W2056548836 cites W1951135110 @default.
• W2056548836 cites W1975753099 @default.
• W2056548836 cites W1998811631 @default.
• W2056548836 cites W2014745934 @default.
• W2056548836 cites W2043129473 @default.
• W2056548836 cites W2043899102 @default.
• W2056548836 cites W2044985673 @default.
• W2056548836 cites W2065007243 @default.
• W2056548836 cites W2130806871 @default.
• W2056548836 cites W2131339579 @default.
• W2056548836 cites W2136476987 @default.
• W2056548836 cites W2327174805 @default.
• W2056548836 cites W2622779740 @default.
• W2056548836 cites W4239400314 @default.
• W2056548836 doi "https://doi.org/10.1016/0014-3057(74)90169-4" @default.
• W2056548836 hasPublicationYear "1974" @default.
• W2056548836 type Work @default.
• W2056548836 sameAs 2056548836 @default.
• W2056548836 citedByCount "30" @default.
• W2056548836 countsByYear W20565488362018 @default.
• W2056548836 countsByYear W20565488362021 @default.
• W2056548836 crossrefType "journal-article" @default.
• W2056548836 hasAuthorship W2056548836A5015937286 @default.
• W2056548836 hasAuthorship W2056548836A5067123488 @default.
• W2056548836 hasAuthorship W2056548836A5083180506 @default.
• W2056548836 hasConcept C113196181 @default.
• W2056548836 hasConcept C120665830 @default.
• W2056548836 hasConcept C121332964 @default.
• W2056548836 hasConcept C159985019 @default.
• W2056548836 hasConcept C171001562 @default.
• W2056548836 hasConcept C178790620 @default.
• W2056548836 hasConcept C185592680 @default.
• W2056548836 hasConcept C188027245 @default.
• W2056548836 hasConcept C192562407 @default.
• W2056548836 hasConcept C2777922577 @default.
• W2056548836 hasConcept C44228677 @default.
• W2056548836 hasConcept C46275449 @default.
• W2056548836 hasConcept C521977710 @default.
• W2056548836 hasConcept C56052488 @default.
• W2056548836 hasConcept C58018886 @default.
• W2056548836 hasConcept C74561354 @default.
• W2056548836 hasConcept C8010536 @default.
• W2056548836 hasConcept C91881484 @default.
• W2056548836 hasConceptScore W2056548836C113196181 @default.
• W2056548836 hasConceptScore W2056548836C120665830 @default.
• W2056548836 hasConceptScore W2056548836C121332964 @default.
• W2056548836 hasConceptScore W2056548836C159985019 @default.
• W2056548836 hasConceptScore W2056548836C171001562 @default.
• W2056548836 hasConceptScore W2056548836C178790620 @default.
• W2056548836 hasConceptScore W2056548836C185592680 @default.
• W2056548836 hasConceptScore W2056548836C188027245 @default.
• W2056548836 hasConceptScore W2056548836C192562407 @default.
• W2056548836 hasConceptScore W2056548836C2777922577 @default.
• W2056548836 hasConceptScore W2056548836C44228677 @default.
• W2056548836 hasConceptScore W2056548836C46275449 @default.
• W2056548836 hasConceptScore W2056548836C521977710 @default.
• W2056548836 hasConceptScore W2056548836C56052488 @default.
• W2056548836 hasConceptScore W2056548836C58018886 @default.
• W2056548836 hasConceptScore W2056548836C74561354 @default.
• W2056548836 hasConceptScore W2056548836C8010536 @default.
• W2056548836 hasConceptScore W2056548836C91881484 @default.
• W2056548836 hasIssue "7" @default.
• W2056548836 hasLocation W20565488361 @default.
• W2056548836 hasOpenAccess W2056548836 @default.
• W2056548836 hasPrimaryLocation W20565488361 @default.
• W2056548836 hasRelatedWork W1931005405 @default.
• W2056548836 hasRelatedWork W1990625394 @default.
• W2056548836 hasRelatedWork W2000704145 @default.
• W2056548836 hasRelatedWork W2044093699 @default.
• W2056548836 hasRelatedWork W2094918853 @default.
• W2056548836 hasRelatedWork W2114232820 @default.
• W2056548836 hasRelatedWork W2354626557 @default.
• W2056548836 hasRelatedWork W2393939846 @default.
• W2056548836 hasRelatedWork W4249016831 @default.
• W2056548836 hasRelatedWork W2505442838 @default.
• W2056548836 hasVolume "10" @default.
• W2056548836 isParatext "false" @default.
• W2056548836 isRetracted "false" @default.
• W2056548836 magId "2056548836" @default.
• W2056548836 workType "article" @default.