ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
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.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1976.070200501
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