Thermo Oxidative Stability
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Stabilization effect of kraft lignin into PBAT:Thermal analyses approach
ABSTRACT Sterically hindered phenols are an important class of synthetic antioxidants for polymers, commonly incorporated to inhibit polyolefins or polyesters oxidation. However, synthetic antioxidants use is under restricted regulation due to their potential health risk and environmental impacts. Thus, great interest has been attracted to the phenol-based n
Matéria (Rio J.). Publicado em: 16/09/2019
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2. Quality parameters and thermogravimetric and oxidative profile of Muruci oil ( Byrsonima crassifolia L.) obtained by supercritical CO2
Abstract These researches aimed determine the quality parameters, the nutritional profile, and the thermogravimetric and oxidative behavior of Muruci (Byrsonima crassifolia L .) oil obtained by supercritical CO2 extraction. The results showed an average oil yield of 5.50%. The acidity and peroxide values show good quality and conservation standards, accordi
Food Sci. Technol. Publicado em: 2018-03
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3. Preliminary studies of new strains of Trametes sp. from Argentina for laccase production ability
Abstract Oxidative enzymes secreted by white rot fungi can be applied in several technological processes within the paper industry, biofuel production and bioremediation. The discovery of native strains from the biodiverse Misiones (Argentina) forest can provide useful enzymes for biotechnological purposes. In this work, we evaluated the laccase and manganes
Braz. J. Microbiol.. Publicado em: 2016-06
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4. Avaliação da estabilidade termo-oxidativa do óleo das sementes de quiabo (Abelmoschus esculentus (L.) Moench) / Evaluation of the thermo-oxidative stability of okra seeds oil (Abelmoschus esculentus (L.) Moench)
A crescente demanda por óleos vegetais criou a necessidade de se avaliar fontes oleaginosas alternativas para suprir esta procura. Como a oxidação é um fator crítico inerente aos óleos vegetais, este trabalho visou contribuir com dados de estabilidade térmica e oxidativa do óleo de quiabo, ainda não explorado comercialmente. Esta pesquisa investigou
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
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5. Synthesis of a boron modified phenolic resin
Abstract: Phenolic resin has long been used as matrix for composites mainly because of its flame retardant behavior and high char yield after pyrolysis, which results in a self supporting structure. The addition of ceramic powders, such as SiC and B4C, as fillers to the phenolic resin, results in better thermo-oxidative stability, but as drawbacks, it has po
J. Aerosp. Technol. Manag.. Publicado em: 2010-08
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6. Análise termo-oxidativa do biodiesel de girassol (helianthus annuus) / Thermo-oxidative Analysis of Sunflower (Hellianthus annus) Biodiesel
The present work aims at investing the biodiesel obtained from the transesterification of sunflower oil by means of alkaline catalysis using 30% of ethyl alcohol, 1% KOH for each 100g of oil and (1:6) oil/alcohol molar ratio. The overall content of ethyl esters (99.72%) was determined by gas chromatography coupled to mass spectrometer, confirm the efficiency
Publicado em: 2009
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7. Evaluation of the Fluid Dynamic Properties and Kinetic Study by Pressurized Differential Scanning Calorimetry (PDSC) of Ethanolic Biodiesel Derived from Used Frying Oil / Avaliação das Propriedades Fluído-dinâmicas e Estudo Cinético por Calorimetria Exploratória Diferencial Pressurizada (PDSC) de Biodiesel Etílico Derivado de óleo de fritura usado
The present work aimed at investigating the biodiesel issuing from the transesterification of used frying oil with ethanol, via alkaline catalysis. Such investigation covers its thermo-oxidative stability during heating (thermal analysis and rheological properties) as well the kinetic profiles of the samples in the best oxidative induction time by the techni
Publicado em: 2009
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8. "Aplicação de catalisadores de níquel e cobalto preparados via precursores do tipo hidrotalcita nas reações de reforma a vapor, oxidação parcial e reforma oxidativa do metano" / "Application of nickel and cobalt catalysts prepared via hydrotalcite-type precursors in the reactions of steam reforming, partial oxidation and oxidative reforming of methane"
One of the most important applications of methane is the syngas production, a mixture of H2 and CO. Three processes can lead to syngas formation from methane: steam reforming, CO2 reforming and partial oxidation. Various non-noble metal catalysts were studied in these processes, although the carbon deposition or the metal sinterization is always observed. Ca
Publicado em: 2007
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9. EstabilizaÃÃo radiolÃtica do poli(metacrilato de metila) industrial
Poly(methyl methacrylate), PMMA, Acrigel, a Brazilian polymer, is used in the manufacture of medical supplies sterilizable by ionizing radiation. However, when PMMA is gammairradiated it undergoes main chain scissions, which promote molecular degradation causing reduction in its physical properties. Therefore, radiolytic stabilization of PMMA is important fo
Publicado em: 2005
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10. Formulações de misturas de polipropileno pos-consumo e virgem para processamento por injeção
This project originated from the necessity to obtain recycled polymers with quality and prices competitive with virgin resin. We chose polypropylene (PP) due to its properties, versatility and frequent use in injection moulding. The processing parameters of PP for ex:trusion were determined, verifying that the increase of the temperature profile and of the s
Publicado em: 1999