The photolysis and co-irradiated decomposition of barium and strontium azides

dc.contributor.advisorProut, E Gen_ZA
dc.contributor.authorShephard, Enid Gwendolynen_ZA
dc.date.accessioned2016-11-01T10:36:22Z
dc.date.available2016-11-01T10:36:22Z
dc.date.issued1974en_ZA
dc.description.abstractThe effect of ultraviolet radiation on sieved powders and pellets of barium azide in the temperature range 27,0° - 135,0°C and of strontium azide in the temperature range 30,0° - l35,0°C has been studied. Decompositions in the temperature range 27,0°- 100,0°C for barium azide and 30,0° - 90,0°C for strontium azide have been termed photolytic decompositions, while reactions in the temperature range 110,0° - l35,0°C (the thermal decomposition temperature range) for both compounds have been termed co-irradiated decompositions. The ultraviolet light source used was a very high intensity 100 watt "point source" high pressure mercury arc lamp. The extent of decomposition was almost the same as a simple thermal decomposition. Kinetic analyses, activation energy determinations, studies of the dependence of reaction rates on light intensity, the effect of water vapour on the sample at various stages of reaction and the observance of the colour of the sample at various stages of reaction have been carried out. Analogous results were obtained for the two compounds. In the photolytic temperature range two distinct modes of decomposition are postulated to occur, the transition temperature occurring at 60,0°C for barium azide and at 50,0°C for strontium azide. During co-irradiation it is proposed that decomposition occurs via the expected thermal decomposition process and the photolytic mechanism or a slight variation thereof, above 60,0°C for barium azide and above 50,0°C for strontium azide.en_ZA
dc.identifier.apacitationShephard, E. G. (1974). <i>The photolysis and co-irradiated decomposition of barium and strontium azides</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/22404en_ZA
dc.identifier.chicagocitationShephard, Enid Gwendolyn. <i>"The photolysis and co-irradiated decomposition of barium and strontium azides."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1974. http://hdl.handle.net/11427/22404en_ZA
dc.identifier.citationShephard, E. 1974. The photolysis and co-irradiated decomposition of barium and strontium azides. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Shephard, Enid Gwendolyn AB - The effect of ultraviolet radiation on sieved powders and pellets of barium azide in the temperature range 27,0° - 135,0°C and of strontium azide in the temperature range 30,0° - l35,0°C has been studied. Decompositions in the temperature range 27,0°- 100,0°C for barium azide and 30,0° - 90,0°C for strontium azide have been termed photolytic decompositions, while reactions in the temperature range 110,0° - l35,0°C (the thermal decomposition temperature range) for both compounds have been termed co-irradiated decompositions. The ultraviolet light source used was a very high intensity 100 watt "point source" high pressure mercury arc lamp. The extent of decomposition was almost the same as a simple thermal decomposition. Kinetic analyses, activation energy determinations, studies of the dependence of reaction rates on light intensity, the effect of water vapour on the sample at various stages of reaction and the observance of the colour of the sample at various stages of reaction have been carried out. Analogous results were obtained for the two compounds. In the photolytic temperature range two distinct modes of decomposition are postulated to occur, the transition temperature occurring at 60,0°C for barium azide and at 50,0°C for strontium azide. During co-irradiation it is proposed that decomposition occurs via the expected thermal decomposition process and the photolytic mechanism or a slight variation thereof, above 60,0°C for barium azide and above 50,0°C for strontium azide. DA - 1974 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1974 T1 - The photolysis and co-irradiated decomposition of barium and strontium azides TI - The photolysis and co-irradiated decomposition of barium and strontium azides UR - http://hdl.handle.net/11427/22404 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22404
dc.identifier.vancouvercitationShephard EG. The photolysis and co-irradiated decomposition of barium and strontium azides. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1974 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22404en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleThe photolysis and co-irradiated decomposition of barium and strontium azidesen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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