منابع مشابه
Microgravity opposed-flow flame spread in polyvinyl chloride tubes
The effects of gravity on opposed-flow flame spread in a confined geometry were investigated experimentally in the 2.2-s drop tower at the NASA Glenn Research Center. Pure oxygen flowed through samples of 0.64-cminner-diameter polyvinyl chloride (PVC) tubing held either horizontally or vertically in a combustion chamber filled with nitrogen. The sample was ignited in normal gravity with a hot w...
متن کاملThermal Degradation of Polyvinyl Chloride
A survey is given of the recent advances in the study of and the present knowledge of the thermal degradation of polyvinyl chloride. The sites for initiation of the thermal degradation, the mechanism of the dehydrochiorination, the discolouration of PVC by heat and the influence of plasticizers on the rate of degradation are discussed.
متن کاملEnvironmental Impacts of Polyvinyl Chloride
This report was prepared by the author and does not represent the opinions of The University of Oregon or any of its affiliates. p. 53 © Basel Action Network. PVC coated wire waste sorted and burned by villagers in Guiyu, China. Cancer causing polycyclic aromatic hydrocarbons and dioxins will result from burning wires made from PVC and brominated flame retardants. p. 77 © Bryce lankard/Greenpea...
متن کاملIncidence of cancer among vinyl chloride and polyvinyl chloride workers.
The results of a follow up study of the incidence of cancer and the mortality in a cohort of 454 male workers producing vinyl chloride and polyvinyl chloride are presented. The study population was restricted to employees with more than one year's work experience in the study plant between 1950 and 1969 and the cohort was followed up from 1953 to the end of 1979. Twenty three new cases of cance...
متن کاملVinyl chloride and polyvinyl chloride exposure and occupational lung disease.
S everal recent reports,12 and one in this issue (see page 828), have contributed new observations on pulmonary disease in vinyl chloride (VC ) -and polyvinyl chloride (PVC) -exposed patients. Earlier reports, a few even preceding the identification in 1974 of vinyl chloride as a human carcinogen (with hemangiosarcoma of the liver the marker tumor, but most probably not the only tumor), had cen...
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ژورنال
عنوان ژورنال: BMJ
سال: 1973
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.3.5879.543-a