exudation of an antioxidant additive from thin polyethylene

Exudation of an antioxidant additive from thin polyethylene

The equilibrium solubility of the antioxidant in polyethylene was estimated to be less than 0.01 weight percent at room temperature. About 70 percent of the antioxidant was expelled from a thin polyethylene film after storage for three days at 70°C.

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Additive blooming in polymer materials: Consequences in the

for enhancing the antioxidant effect. If the concentration of an antioxidant introduced into a polymer exceeds the solubility limit (saturation concentration), the mixture undergoes phase segregation with exudation of the ad-ditive on the sample surface. Con? rming data on the exudation of antioxidant additives from thin polyethylene

Apr 29, 2020 · Polyethylene is stabilized routinely by the combination of a phenolic antioxidant and a secondary stabilizer, usually a phosphite or phosphonite. Light stabilizers might be also added to the additive package, in case the application requires it.

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Determination of additives in polyethylene by absorption

Chromatographic Analysis of Antioxidants in Polymeric Materials and Their Migration from Plastics into Solution. , 117-157. https://doi.org/10.1007/12_2007_127; Ronald S. Dobies. Thin-layer chromatographic method for determining antioxidants in polyethylene and polypropylene films. Journal of Chromatography A 1969, 40 , 110-116.

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Antioxidants Polymer Additives: The Effective Oxidation

Antioxidants Polymer Additives: The Effective Oxidation Fighters | Tosaf - Additive and Color Solutions for the Plastic Industry Tosaf's advanced antioxidants polymer additives prevent material degradation during the thermal processing stage. enter now >> Industries Solutions Services About Sustainability

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Physico-chemical analysis of a silane-grafted polyethylene

have investigated some ways to extract the additives from polyolefins, namely, microwave oven and ultrasonic bath techniques for high density polyethylene (HDPE) and polypropylene. We have concentrated on identifying and quantitating recoveries for typical polyolefin antioxidants, such as Irganox 1010, Irgafos 168, and Cyasorb UV i 531.

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Quantitative Analysis of Antioxidants from High Density

Polymers, such as polyethylene are very susceptible to air oxidation without the direct assistance of additives. Additives, as a whole, improve the performance and stability of most polymer resins. The manner in which an additive(s) works depends on the class of additive. There are numerous commercially available additives; the following are

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Antioxidants - BASF

Irganox 1135 Part of primary antioxidants, are aromatic amines, mainly used in carbon-black filled rubbers and some polyurethane applications. Irganox ? 5057 is such an aromatic amine for polyol and rubber stabilization. Secondary antioxidants, including phosphites and thioesters, react with hydroperoxides to yield non-radical products.

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Antioxidants Stabilizers Selection for Polyolefins (PP, PE)

The combination of a low volatile sterically antioxidant such as AO1 (Pentaerythritol Tetrakis (3- (3,5-d-tert-butyl-4-hydroxyphenyl)propionate) with a phosphite such as PS1 (Tris (2,4-ditert-butylphenyl) phosphite) is particularly synergistic and is more robust than an antioxidant alone.

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Exudation of additives to the surface of medical devices

Gas chromatographic determination of acid-catalyzed transesterified antioxidant additive irganox 1076? in polypropylene. Journal of Applied Polymer Science 1986 , 31 (6) , 1709-1719.

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Antioxidants Polymer Additives: The Effective Oxidation

Antioxidants Polymer Additives: The Effective Oxidation Fighters | Tosaf - Additive and Color Solutions for the Plastic Industry Tosaf's advanced antioxidants polymer additives prevent material degradation during the thermal processing stage. enter now >> Industries Solutions Services About Sustainability

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Determination of Polymer Additives-Antioxidants, Ultraviolet

The migration of the antioxidant n-octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate from various plastics into the test fat HB 307 was investigated. Plastics from the following classes were included: high-impact polystyrene (HIPS), polypropylene (PP), high- and low-density polyethylene (HD …

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Determination of Polymer Additives-Antioxidants, Ultraviolet

[4] Antioxidants [ edit] Antioxidants inhibit autoxidation that occurs when polymers reacts with atmospheric oxygen. [5] Aerobic degradation occurs gradually at room temperature, but almost all polymers are at risk of thermal-oxidation when they are processed at high temperatures.

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Antioxidants - BASF

Irganox 1135 Part of primary antioxidants, are aromatic amines, mainly used in carbon-black filled rubbers and some polyurethane applications. Irganox ? 5057 is such an aromatic amine for polyol and rubber stabilization. Secondary antioxidants, including phosphites and thioesters, react with hydroperoxides to yield non-radical products.

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Standard Test Method for Determination of Antioxidants and

have investigated some ways to extract the additives from polyolefins, namely, microwave oven and ultrasonic bath techniques for high density polyethylene (HDPE) and polypropylene. We have concentrated on identifying and quantitating recoveries for typical polyolefin antioxidants, such as Irganox 1010, Irgafos 168, and Cyasorb UV i 531.

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Quantitative Analysis of Antioxidants from High Density

This research employs SFE for the extraction of the antioxidant Ethanox 330 from high density polyethylene (HDPE) followed by HPLC/UV analysis. The effects of temperature, modifier type, and modifier concentration were investigated. Once the optimal extraction conditions were determined, the extraction efficiency

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Determination of additives in polyethylene by absorption

Gas chromatographic determination of acid-catalyzed transesterified antioxidant additive irganox 1076? in polypropylene. Journal of Applied Polymer Science 1986 , 31 (6) , 1709-1719.

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Exudation of additives to the surface of medical devices

The migration of the antioxidant n-octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate from various plastics into the test fat HB 307 was investigated. Plastics from the following classes were included: high-impact polystyrene (HIPS), polypropylene (PP), high- and low-density polyethylene (HD …

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