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Author Asriza, Ristika O. ♦ Arcana, I. Made
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ABSORPTION ♦ BIODEGRADATION ♦ CARBONYLS ♦ COBALT ♦ CONCENTRATION RATIO ♦ FILMS ♦ FOURIER TRANSFORMATION ♦ INFRARED SPECTRA ♦ IRRADIATION ♦ OXIDATION ♦ POLYETHYLENES ♦ SCANNING ELECTRON MICROSCOPY ♦ STEARATES ♦ SURFACE PROPERTIES ♦ SYNTHESIS ♦ ULTRAVIOLET RADIATION
Abstract Cobalt stearate is an oxidant additives that can initiate a process of degradation in high density polyethylene (HDPE). To determine the effect of cobalt stearate in HDPE, oxo-biodegradable polyethylene film was given an irradiation with UV light or heating at various temperature. After given a heating, the FTIR spectra showed a new absorption peak at wave number 1712 cm{sup −1} indicating the presence of carbonyl groups in polymers, whereas after irradiation with UV light is not visible the presence of this absorption peak. The increase concentration of cobalt stearate added in HDPE and the higher heating temperature, the intensity of the absorption peak of the carbonyl group increased. The increasing intensity of the carbonyl group absorption is caused the presence of damage in the film surface after heating, and this result is supported by analysis the surface properties of the film with using SEM. Biodegradation tests were performed on oxo-biodegradable polyethylene film which has been given heating or UV light with using activated sludge under optimal conditions the growth of microorganisms. After biodegradation, the maximum weight decreased by 23% in the oxo-biodegradable polyethylene film with a cobalt stearate concentration of 0.2% and after heating at a temperature of 75 °C for 10 days, and only 0.69% in the same film after irradiation UV light for 10 days. Based on the results above, cobalt stearate additive is more effective to initiate the oxidative degradation of HDPE when it is initiated by heating compared to irradiation with UV light.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-30
Publisher Place United States
Volume Number 1677
Issue Number 1


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