TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
QUENCHER [1 record]
Record 1 - internal organization data 1990-10-31
Record 1, English
Record 1, Subject field(s)
- Chemistry
- Plastics Manufacturing
Record 1, Main entry term, English
- quencher
1, record 1, English, quencher
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
That which is introduced into a luminescent material to reduce the duration of phosphorescence. 2, record 1, English, - quencher
Record number: 1, Textual support number: 1 CONT
Polymers, because of their structure, additives or structure defects, can contain what are referred to as chromophor groups, which by absorbing UV-light can increase the electronic energy level of the polymer. The polymer in this situation can readily react further, for example, with oxygen (photo-oxidation). The higher scale energy of the polymer can be transferred to the quencher by adding energy quencher. The quenchers absorb the scale energy via energy transfers in the form of "safe" long wave rays (fluorescent, phosphorescent and heat rays) which does not promote any further photo-oxidation. 3, record 1, English, - quencher
Record 1, French
Record 1, Domaine(s)
- Chimie
- Plasturgie
Record 1, Main entry term, French
- extincteur de luminescence
1, record 1, French, extincteur%20de%20luminescence
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- extincteur 2, record 1, French, extincteur
correct, masculine noun
- quencher 3, record 1, French, quencher
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Substance introduite dans un corps luminescent afin de réduire la durée de la phosphorescence. 4, record 1, French, - extincteur%20de%20luminescence
Record number: 1, Textual support number: 1 CONT
Les quenchers (extincteurs) sont des substances capables de désactiver les états excités créés dans le polymère par une réaction de transfert (...) Certains auteurs rapportent des synergies intéressantes avec les absorbeurs UV, mais l'association donne lieu à la formation de complexes fortement colorés en jaune (...) On les utilise dans les films et fils minces de polyoléfines (notamment polypropylène en fils ou bandelettes), les polyamides, les polyesters linéaires, etc. 5, record 1, French, - extincteur%20de%20luminescence
Record number: 1, Textual support number: 2 CONT
Les principaux stabilisants "lumière" appartiennent à quatre familles : les pigments (...) Les absorbeurs UV (...) Les extincteurs ("quenchers") qui désactivent les états excités créés par absorption de photons, et sont particulièrement intéressants dans les objets de faible épaisseur (...) Les stabilisants polyfonctionnels (...) 6, record 1, French, - extincteur%20de%20luminescence
Record 1, Spanish
Record 1, Textual support, Spanish
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