Relevant bibliographies by topics / Irgafos 168

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Academic literature on the topic 'Irgafos 168'

Author: Grafiati
Published: 28 June 2023

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Journal articles on the topic "Irgafos 168"

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An, Xijie, Ying Gao, Zizhen Dong, Qinglin Guo, Lili Li, and Yancang Li. "Effects of Commercial Antioxidants on Aging Resistances of Asphalt Binders." Advances in Materials Science and Engineering 2022 (August 11, 2022): 1–16. http://dx.doi.org/10.1155/2022/7725148.

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Asphalt aging has a direct influence on the durability of asphalt mixture. In order to improve thermal oxidizing aging resistance of asphalt, the commercial antioxidants including Irganox 1010 and Irgafos 168 were selected to modify base asphalt and SBR asphalt. The basic properties of modified asphalt before and after the rolling thin film oven test (RTFOT) are evaluated by penetration, softening point, ductility, and viscosity. The Fourier transform infrared spectroscopy (FTIR) test was applied to determine the antiaging mechanism of modified and unmodified asphalt. According to the test result, Irganox 1010 not only reduces the aging degree of asphalt but also has little adverse effect on other properties. Irgafos 168 with a content of 1% improves the low temperature ductility of asphalt and improves the antiaging performance of asphalt significantly. After RTFOT, the content of oxygen-containing functional groups (carbonyl group and sulfoxide group) declines significantly in antioxidation modified asphalt, and Irganox 1010 and Irgafos 168 inhibit oxidizing reaction in the aging procedure. This study can provide a useful reference for improving the aging property of asphalt in highway construction.
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Baloul, Hakim, Naima Belhaneche-Bensemra, Ana Rodriguez Bernaldo De Quirós, and Raquel Sendon. "Analysis and quantitative estimation of phenolic antioxidants in polypropylene packaging for fat products." Journal of Polymer Engineering 38, no. 9 (October 25, 2018): 899–904. http://dx.doi.org/10.1515/polyeng-2017-0454.

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AbstractThe aim of this work was to study the interactions between polypropylene (PP) food packaging for fatty products (margarine) and food simulant. For this purpose, a simulant (olive oil) was used in two different temperatures (20°C and 40°C). The interaction phenomena were investigated according to the rate of mass variation of PP samples with time and by using Fourier transform infrared spectroscopy, scanning electron microscopy and high-performance liquid chromatography (HPLC). The results showed the presence of two phenomena – migration of additives and sorption of the simulant, with the phenomena more pronounced at 40°C. Furthermore, the HPLC analysis identified the presence of Irganox 1010 and Irgafos 168 as antioxydants and allowed to carry out a kinetic study of Irganox 1010 migration. The concentration of Irganox 1010 decreased from 13.35 to 4.76 mg/kg at a temperature of 40°C and to 5.85 mg/kg at a temperature of 20°C after 10 days of contact with olive oil. The Irgafos 168 migration could not be evaluated because it is very sensitive to oxidation.
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Hernández-Fernández, Joaquín, Heidis Cano, and Ana Fonseca Reyes. "Valoration of the Synthetic Antioxidant Tris-(Diterbutyl-Phenol)-Phosphite (Irgafos P-168) from Industrial Wastewater and Application in Polypropylene Matrices to Minimize Its Thermal Degradation." Molecules 28, no. 7 (April 2, 2023): 3163. http://dx.doi.org/10.3390/molecules28073163.

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Industrial wastewater from petrochemical processes is an essential source of the synthetic phenolic phosphite antioxidant (Irgafos P-168), which negatively affects the environment. For the determination and analysis of Irgafos P-168, DSC, HPLC-MS, and FTIR methodologies were used. Solid phase extraction (SPE) proved to be the best technique for extracting Irgafos from wastewater. HPLC-MS and SPE determined the repeatability, reproducibility, and linearity of the method and the SPE of the standards and samples. The relative standard deviations, errors, and correlation coefficients for the repeatability and reproducibility of the calibration curves were less than 4.4% and 4.2% and greater than 0.99955, respectively. The analysis of variance (ANOVA), using the Fisher method with confidence in 95% of the data, did not reveal significant differences between the mentioned parameters. The removal of the antioxidant from the wastewater by SPE showed recovery percentages higher than 91.03%, and the chemical characterization of this antioxidant by FTIR spectroscopy, DSC, TGA, and MS showed it to be structurally the same as the Irgafos P-168 molecule. The recovered Irgafos was added to the polypropylene matrix, significantly improving its oxidation times. An OIT analysis, performed using DSC, showed that the recovered Irgafos-blended polypropylene (PP) demonstrated oxidative degradation at 8 min. With the addition of the Irgafos, the oxidation time was 13 min. This increases the polypropylene’s useful life and minimizes the environmental impact of the wastewater.
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Siriorn, Isarankura Na Ayutthaya, Bunyarak Munchumart, Boondeacha Natanicha, Sangrawee Nut, Markmee Nopparat, and Haaian Suchart. "Viscosity improvement of recycled poly (ethylene terephthalate) from waste bottles by adding antioxidants and chain-extender." E3S Web of Conferences 302 (2021): 02019. http://dx.doi.org/10.1051/e3sconf/202130202019.

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This research work is focused on the viscosity improvement of recycled poly(ethylene terephthalate) (rPET) from waste bottles by adding antioxidants and multi-functional reactive polymer (Joncry ADR 4468, chain extender). The achieve the objective of this work the investigated was broken into two parts. The first part studied the effect of rPET viscosity after adding various types of antioxidants and stabilizer such as Irgafos®168, Tinuvin® 770, Irganox®1010. The second part observed the effect of viscosity after it was blended with chain extender at 0, 0.2, 0.4, 0.6 and 0.8 pph. rPET was then dried in the oven at 120 oC for 12 hrs, to deplete the moisture. Then, the dried rPET (mixed with the chemicals above) was extruded into a compound using a twin screw extruder. The shear viscosity of the extruded compound was then measured using a rotational rheometer at 270 oC. The results revealed that the addition of chain extender increased the shear viscosity and the tensile strength at break of rPET. Therefore, the chain extender interacted with chains, which could change the structure to be the longer chains, branching or network structures. These structures are entangled and interrupt the movement of the molecular chains. It can be concluded that the viscosity of rPET can be improved by adding a chain extender at 0.6 pph, and the antioxidants of Irgafos®168, Tinuvin®770 and Irganox®1010 at 0.2, 0.1 and 0.5 pph, respectively.
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Farajzadeh, Mir Ali, Leila Goushjuii, Ali Ranji, and Elham Feyz. "Spectrophotometric determination of Irgafos 168 in polymers after different sample preparation procedures." Microchimica Acta 159, no. 3-4 (February 6, 2007): 263–68. http://dx.doi.org/10.1007/s00604-006-0721-8.

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Farajzadeh, Mir Ali, Mohammad Reza Vardast, and Morteza Bahram. "Optimization of Dispersive Liquid–Liquid Microextraction of Irganox 1010 and Irgafos 168 from Polyolefins Before Liquid Chromatographic Analysis." Chromatographia 69, no. 5-6 (December 11, 2008): 409–19. http://dx.doi.org/10.1365/s10337-008-0912-z.

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Cardoso, Augusto O. "Determinação de Inibidores de Degradação em Polietileno de Alta Densidade (PEAD) Através da Extração por Micro-Ondas e Análise via HPLC." Revista Processos Químicos 9, no. 17 (January 2, 2015): 55–64. http://dx.doi.org/10.19142/rpq.v9i17.238.

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A extração e subsequente separação e quantificação de substâncias que retardam o processo de degradação no Polietileno de Alta Densidade (PEAD), denominadas como aditivos, têm provado ser um desafio para os químicos. Existem alguns métodos que utilizam o refluxo com solventes específicos para esta extração, assim como energia sônica, forno de microondas, extração com fluido supercrítico, apenas para citar os mais utilizados. Recentemente foi lançado no mercado um digestor que utiliza micro-ondas, normalmente, usado em sínteses orgânicas, mas que também pode ser utilizado nas extrações de aditivos em polímeros. Por ser uma técnica nova, na literatura praticamente não existem publicações científicas a respeito do seu uso para a extração de aditivos em PEAD, embora para polipropileno e polietileno linear já existam métodos consagrados para esta finalidade. Foi obtida uma boa condição para a extração de irganox 1010, irganox 1076 e irgafos 168 fosfito e fostato em 30 minutos, com subsequente separação em corrida de oito minutos, utilizando HPLC com fase reversa, coluna C18 e fase móvel isocrática composta por acetonitrila e metanol. Salientamos que, apesar de terem sido determinadas condições ótimas de extração, não significa afirmar que sejam as únicas possíveis. Certamente existirão outras combinações de parâmetros que trarão boas taxas de recuperação destes aditivos em PEAD.
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Fiorio, Rudinei, Dagmar D’hooge, Kim Ragaert, and Ludwig Cardon. "A Statistical Analysis on the Effect of Antioxidants on the Thermal-Oxidative Stability of Commercial Mass- and Emulsion-Polymerized ABS." Polymers 11, no. 1 (December 25, 2018): 25. http://dx.doi.org/10.3390/polym11010025.

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In the present work, statistical analysis (16 processing conditions and 2 virgin unmodified samples) is performed to study the influence of antioxidants (AOs) during acrylonitrile-butadiene-styrene terpolymer (ABS) melt-blending (220 °C) on the degradation of the polybutadiene (PB) rich phase, the oxidation onset temperature (OOT), the oxidation peak temperature (OP), and the yellowing index (YI). Predictive equations are constructed, with a focus on three commercial AOs (two primary: Irganox 1076 and 245; and one secondary: Irgafos 168) and two commercial ABS types (mass- and emulsion-polymerized). Fourier transform infrared spectroscopy (FTIR) results indicate that the nitrile absorption peak at 2237 cm−1 is recommended as reference peak to identify chemical changes in the PB content. The melt processing of unmodified ABSs promotes a reduction in OOT and OP, and promotes an increase in the YI. ABS obtained by mass polymerization shows a higher thermal-oxidative stability. The addition of a primary AO increases the thermal-oxidative stability, whereas the secondary AO only increases OP. The addition of the two primary AOs has a synergetic effect resulting in higher OOT and OP values. Statistical analysis shows that OP data are influenced by all three AO types, but 0.2 m% of Irganox 1076 displays high potential in an industrial context.
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Yan, Yan, Chang-Ying Hu, Zhi-Wei Wang, and Zi-Wei Jiang. "Degradation of Irgafos 168 and migration of its degradation products from PP-R composite films." Packaging Technology and Science 31, no. 10 (July 19, 2018): 679–88. http://dx.doi.org/10.1002/pts.2405.

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GARDE, JOSÉ A., RAMÓN CATALÁ, and RAFAEL GAVARA. "Global and Specific Migration of Antioxidants from Polypropylene Films into Food Simulants." Journal of Food Protection 61, no. 8 (August 1, 1998): 1000–1006. http://dx.doi.org/10.4315/0362-028x-61.8.1000.

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Global migration and specific migration of antioxidants (AOs)—Irgafos 168 [tris(2,4-di-tert-butylphenyl) phosphite], Irganox 1076 [octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl-propionate], and Hostanox SE2 (disteary thiodipropionate)—from polypropylene (PP) films into food simulants (water, 3% acetic acid, 95% ethanol, olive oil, and heptane) were studied. Films (50, 100, and 200 μm thick) were exposed to simulants at temperature-time conditions simulating migration under retorting and long-term storage. Global migration into aqueous simulants was independent of film thickness and conditions of exposure, so it seems as if the migration process was limited to the dissolution of migrants on the contacting surface. Global migration to fatty food simulants was dependent on simulant, conditions of exposure, and in some cases film thickness. Specific AO migration was analyzed from dry residues obtained from global migration analysis. Migration of AOs into aqueous simulants was below the detection limit (0.01 mg/dm2). Migration into fatty food simulants was dependent on the simulant. The extractive power of simulants was similar to that observed in global migration studies. Specific migration into heptane was independent of the polymer mass, though dependent on the thickness. Migration into ethanol was dependent on both mass and thickness. A theoretical discussion about the controversial effect of thickness on migration results, based on the kinetics of the process, is presented.
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Dissertations / Theses on the topic "Irgafos 168"

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Castillo, Roberto. "Répercussion de traitements physiques de décontamination du polypropylène sur ses propriétés physico-chimiques." Electronic Thesis or Diss., Paris, AgroParisTech, 2014. http://www.theses.fr/2014AGPT0009.

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Les emballages alimentaires sont très règlementés par rapport à leur utilisation. La réglementation européenne CE N°10/2011 « Plastic Implement Measures » impose la vérification de l’innocuité des emballages sur le fondement du principe de précaution. Une notion de risque est associée aux emballages en raison de la méconnaissance de la réactivité des molécules provenant des additifs utilisés et celles propres du plastique. Les produits de réaction et/ou dégradation (dits néo-formés) sont peu ou pas connus.Les néoformés peuvent se produire au cours de toute la vie d’utilisation des emballages alimentaires, dès leur production jusqu’à l’utilisation finale pour le consommateur. Dans le cadre de ce travail, nous avons déterminé l’influence de deux méthodes physiques de décontamination de surfaces : la lumière pulsée et le faisceaux accéléré d’électrons, sur des films de polypropylène avec une formulation d’additifs spécifiques.Des molécules comme les oligomères (POSH) sont propres au polymère, et elles empêchent la correcte identification de néo-formés. L’utilisation de techniques comme la chromatographie liquide couplée à une chromatographie en phase gazeuse (LC-GC) ou la chromatographie gazeuse bidimensionnelle (GCxGC) est nécessaire pour séparer les oligomères et analyser les films et les néo-formés.Parmi les molécules étudiées, seul l’antioxydant Irgafos 168 a présenté une réactivité suite au traitement par Lumière Pulsée : une formation de plusieurs isomères soit de la molécule originale suite à l’oxydation, soit après la perte de un groupe tert-butyle. D’autre part, le traitement par faisceaux d’électrons a généré plusieurs néoformés provenant des additifs utilisés, d’ailleurs une augmentation des oligomères a été quantifiée.Les méthodologies utilisées ainsi que les néo-formés identifiés lors de ce travail pourraient constituer des outils de référence dans le cadre d’études ultérieures sur les effets de procédés de décontamination
Food packaging is highly regulated respect to their use. European regulation CE N ° 10/2011 "Plastic Implement Measures" requires the verification of the safety of packaging on the basis of the precautionary principle. A notion of risk is associated with packaging due to a lack of knowledge of the reactivity of the molecules from the additives used and those specific from plastic. The products of reaction and/or degradation (called neo-formed) are little known or not known.The neo-formed products may occur during the lifetime of use of food packaging, from production to final use by the consumer. As part of this work, we determined the influence of two physical methods for decontamination of surfaces: pulsed light and electron-beams, on polypropylene films specifically formulated for this study.Some molecules such as oligomers (POSH) are specific of polymers. They are already present in the films before treatment and they avoid a good identification of the neo-formed molecules. The use of techniques such as liquid chromatography coupled with gas chromatography (LC-GC) or two-dimensional gas chromatography (GCxGC) is required to separate the oligomers and analyze the films and neo-formed molecules.Only the antioxidant Irgafos 168 among the molecules studied, presented reactivity after Pulsed Light treatment, it was observed the formation of several isomers from the original molecule following oxidation, or after the loss of a tert-butyl group. On the other hand, the Electron-Beam treatment generated several neoformed from all the molecules studied; in addition an increase of the oligomers was quantified.Methodologies used and the neo-formed molecules identified in this work could provide reference tools for the next studies about the effects of decontamination processes
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Book chapters on the topic "Irgafos 168"

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Deschênes, L., D. J. Carlsson, Y. Wang, and C. Labrèche. "Postirradiation Transformation of Additives in Irradiated HDPE Food Packaging Materials: Case Study of Irgafos 168." In ACS Symposium Series, 277–89. Washington, DC: American Chemical Society, 2004. http://dx.doi.org/10.1021/bk-2004-0875.ch017.

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"Specific Migration Of Antioxidants Bht, Irganox 1076, And Irgafos 168 Into Typical Edible Oils Under Microwave Heating Conditions." In Polymers for Packaging Applications, 71–82. Apple Academic Press, 2014. http://dx.doi.org/10.1201/b17388-5.

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Conference papers on the topic "Irgafos 168"

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YAN, YAN, CHANG-YING HU, and ZHI-WEI WANG. "Migration of Irgafos 168 and its Degradation Products from Nanocopper/Polypropylene Composite Films and its Prediction by AKTS-SML Software." In The 21st IAPRI World Conference on Packaging. Lancaster, PA: DEStech Publications, Inc., 2018. http://dx.doi.org/10.12783/iapri2018/24414.

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