The spectral distributions of xenon-arc radiation using several filter systems were compared to August sun-sky radiation measured behind window glass. By locating the main bond-dissociation energies of polyester and nylon at their equivalent photon energies on the spectral distribution curves it was possible to explain the discrepancies in degradation rates, reported in Part I of this work, which occurred between the xenon-arc and outdoor exposures. These differences in spectra may also account for degradation sensitization by anatase during the outdoor exposures.
Allen, C.W., "Astrophysical Quantities," University of London, Athlone Press, 1963).
2.
American Society for Testing and Materials, " ASTM Book of Standards," Part 30, Conducting Natural Light (Sunlight and Daylight) Exposures Under Glass, Philadelphia, 1968,508-511.
3.
American Society for Testing and Materials, " ASTM Book of Standards," Part 30, Operating Light and Water Exposure Apparatus (Xenon Arc Type), E239-64T, Philadelphia, 1968, pp. 752-759.
4.
Benson, S.W. , Bond Energies. J. Chem. Educ . 42, 502518 (1965).
5.
Brandt, J.C. , and Hodge, P.W. "Solar System Astrophysics," New York, McGraw-Hill, 1964.
6.
Canadian Government Specifications Broad, 4-GP-2, Canada Standard Textile Test Methods, Method 18.21967 .
7.
Colemba, F.J. , and Guillet, J.E.Mechanisms of Ultraviolet Stabilization of Polymer Films, J. Paint Technol.41, (532) 315-320 (1969).
8.
Egerton, G.S. and Shah, K.M., The Effect of Temperature on the Photochemical Degradation of Textile Materials. Part I: Degradation Sensitized by Titanium Dioxide. Textile Res. J.38, 130-135 (1968).
9.
Hinson, W.R. and Kelly P.G., Effects of Some White Pigments on the Actinic Degradation of Cotton. Nature177(4522) 1241-1242 (1956 ).
10.
Hirt, R.C. and Searle, N. Z. EnergyCharacteristics of Outdoor and Indoor Exposure Sources and their Relation to the Weatherability of Plastics, "Applied to Polymer Symposia," No. 4, New York, Interscience, 1967, pp. 61-83.
11.
Jellinek, H.H.C. , Fundamental Degradation Processes Relevent to Outdoor Exposure of Polymers, Applied Polymer Symposia," No. 4, Interscience, New York. 1967 pp. 41-59.
Marcotte, F.B. , Campbell, D., Cleaveland , J.A., and Turner. D. J., Photolysis of Polyethylene Terephthalate. J. Polymer Sci. A-15, 481-501 (1967).
15.
Mark, H. F., Atlas, S. M., and Cernia, E., Eds., "Man-Made Fibers Science and Technology,'' Vol. 2, New York, Interscience1968.
16.
Norton, J.E. , Kiunthe, H.O., and Connor, J.D., New Developments in Water-Cooled Xenon Lamps for Light fastness and Weathering Tests, Part I, Can. Textile J.86 (10), 50-54 (1969).
17.
Searle, N.Z. , Giesecke, P., Kinmonth , R., and Hirt, R.C., Ultraviolet Spectral Distributions and Aging Characteristics of Xenon Arcs and Filters , Appl. Opt.3(7), 923927 (1964).
18.
Singleton, R.W., Kunkel, K.K., and Sprague, B.S., FactorsInfluencing the Evaluation of Actinic Degradation of Fibers. Textile Res. J.35, 228-237 (1965).
19.
Stephenson, C.V. et al. Ultraviolet Irradiation of Plastics. III: Decomposition Products and Mechanics, J. Polymer Sci.55, 447488 (1961).
20.
Technical Manual of the American Association of Textile Chemists and Colorists, Standard Test, 16-1964T 1967.
21.
Wall, M.J. and Frank G.C., A Study of the Spectral Distributions of Sun-sky and Xenon Arc Radiation in Relation to the Degradation of Some Textile Yarns. Part I: Yarn Degradation . Textile Res. J.41, 3238 ( 1971).
