ISSN:
0021-8995
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
A comparison of the effect of two structurally similar additives, 1-benzoyl-2-naphthol and 6-hydroxybenzanthrone, on the rate of photo-oxidation of polypropylene under conditions of simulated daylight shows that while 6-hydroxybenzanthrone acts as a prodegradant, 1-benzoyl-2-naphthol is a light stabilizer. Examination of the spectroscopic and photochemical properties of 1-benzoyl-2-naphthol indicates that in fluid solution the photoexcited stabilizer is probably deactivated within the singlet manifold. In glassy solvents at 77°K, on the other hand, triplet formation does occur, but only in molecules in which the intermolecular hydrogen bond of the 1-benzoyl-2-naphthol is disrupted.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/app.1976.070200501
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