Structure–property relationships: phenolic antioxidants with high efficiency and low colour contribution

Vulić, Ivan; Vitarelli, Giacomo; Zenner, John M.

doi:10.1016/s0141-3910(02)00115-5

Cited by 58 publications

(32 citation statements)

References 7 publications

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“…An additive that serves as a stabilizer can be added to reduce the effects of aging. For example, amine and hindered phenols act as H donor on free radicals thus preventing the propagation of a chain reaction [4]. Hindered phenol compounds, such as types of AO 2246 is used because it was evidence that AO 2246 was a proper stabilizer for HTPB that used as a propellant binder [5].…”

Section: Introductionmentioning

confidence: 99%

Stabilizer Effect on Thermal Decomposition of Aged Solid Propellant

Setyaningsih

Juwono

Supriyatno

2017

J. Phys.: Conf. Ser.

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Abstract. Composite solid propellants experience aging process during storage, and their properties will alter. The stabilizer added was used to reduce the effects of aging. This research studied the influence of the stabilizer on changes of the composite solid propellant thermal decomposition due to the onset of aging during the 40 days of storage at a temperature of 333 K. AO 2246 as a stabilizer added by as much as 0 to 1% by weight of propellant binders. The testing method used is heating the samples at various heating rate using DSC. And the Ozawa method was used to determine the values of the activation energy and frequency factor on the Arrhenius parameters. The optimal composition of stabilizer was 0.5 wt% for those on the value of activation energy and frequency factors for unaged and aged propellants were nearly the same i.e. 196 kJ/mol and 1.22 x10 12 min -1 .

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Section: Introductionmentioning

confidence: 99%

Stabilizer Effect on Thermal Decomposition of Aged Solid Propellant

Setyaningsih

Juwono

Supriyatno

2017

J. Phys.: Conf. Ser.

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“…Antioxidants are used in the production of almost all commercial polymers in an amount of up to 2% [13]. Antioxidants used in the process of polyethylene production can be divided into two types: primary, which are incorporated in the polymer chain, and secondary [14][15]. Primary stabilizers prevent or interrupt oxidation reaction, while secondary ones prevent the formation of free radicals by disintegration of unstable hydroperoxides before their automatic hemolytic decomposition [16].…”

Section: Introductionmentioning

confidence: 99%

Application Of Numerical Modeling In Quantitative Assessment Of BHT Dispersion In PE-HD Pipes

Musz

Kowalska

2015

Ecological Chemistry and Engineering S

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PE-HD water pipes are exposed to adverse environmental conditions, both during production and their subsequent use in the civil engineering. Several organic compounds migrating into water may lead to deterioration of water quality, especially its taste and odour. Commonly used antioxidant BHT and its products of degradation are leached into water as a result of degradation of the PE-HD pipes material. This paper presents the results of laboratory tests of BHT concentration changes in water circulating in the PE-HD close loop pipe of 30 m length as well as of numerical studies based on data obtained by the laboratory measurements. Numerical calculations were performed using the commercial software Fluent, Ansys Inc., based on the computational fluid dynamics (CFD) principles. The analysis of water samples confirmed the migration of the antioxidant from the pipe material into the water. The results of numerical analysis gave good agreement with the measured values.

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“…Reactions that occurred here account largely for the characteristic absorbance observed in the IR spectra of degraded samples of ABS. The oxidation process of polymers can be broken in two pathways: an H-atom source other than the polymer chain can be found, or the hydroperoxides can be decomposed into non-reactive products [7]. In general, antioxidants can be divided into two broad classes, primary and secondary, depending on their mode of operation.…”

Section: Introductionmentioning

confidence: 99%

“…Primary antioxidants break the degradation by donating H atoms to free radicals, thus preventing those radicals from the chain reaction. Secondary antioxidants rely on a mechanism involving the decomposition of hydroperoxides, which make them relatively stable so that they can't contribute to further polymer oxidation [7,8]. In particular, physical mixtures of these two types of antioxidants often show remarkable synergistic effects [7,[9][10][11]; however, either additive or antagonistic effects may also result as a consequence of using mixtures of stabilizers [9,11].…”

Section: Introductionmentioning

confidence: 99%

Performance and synergistic effect of phenolic and thio antioxidants in ABS graft copolymers

Guo

Wang

et al. 2010

Front. Chem. Sci. Eng.

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The synergistic effect of phenolic and thio antioxidants on the stabilization of acrylonitrile-butadienestyrene (ABS) graft copolymers has been studied. Three commercial antioxidants Irganox245, Irganox1076 and dilauryl thiodipropionate (DLTP) were selected. Formulations based on hindered phenols and secondary antioxidant DLTP were prepared. Stabilization was monitored in terms of changes in the functional groups (oxidation products), tensile properties and yellowness index. Differential scanning calorimetry (DSC) and thermogravimetry (TG) were also used to assess the stability. The results indicated that the combination of Irganox245 and DLTP showed much better stabilization effect than the individual components due to the strong synergistic effect. Only weak synergism could be observed in the formulation that contained Irganox1076 and DLTP. Irganox1076 and Irgnox1076/DLTP exhibited similar behaviors between antioxidants with the highest and lowest efficiencies.

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Structure–property relationships: phenolic antioxidants with high efficiency and low colour contribution

Cited by 58 publications

References 7 publications

Stabilizer Effect on Thermal Decomposition of Aged Solid Propellant

Stabilizer Effect on Thermal Decomposition of Aged Solid Propellant

Application Of Numerical Modeling In Quantitative Assessment Of BHT Dispersion In PE-HD Pipes

Performance and synergistic effect of phenolic and thio antioxidants in ABS graft copolymers

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