Stabilization of PE with Pomegranate Extract: Contradictions and Possible Mechanisms

Tátraaljai, Dóra; Tang, Yun; Pregi, Emese; Vági, Erika; Horváth, Viola; Pukánszky, Béla

doi:10.3390/antiox11020418

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…Unfortunately, the extracts have a very moderate stabilization effect; their OIT value hardly exceeds 10 min. The phenomenon has been observed before; the extract of pomegranate peel had a very good processing stabilization effect but offered no residual stability for the polymer [ 21 , 22 ].…”

Section: Resultsmentioning

confidence: 75%

“…Flavonoids produced by plants, such as quercetin [ 15 , 16 , 17 ], rutin [ 18 ] and dihydromyricetin [ 19 ], proved efficient stabilizers in polyethylene, and the comparison of a natural extract, silymarin, to its main component, silybin, showed that extracts could be more efficient than purified single compounds [ 20 ]. Recently, pomegranate peel extract was used for the processing stabilization of polyethylene, and its efficiency exceeded that of the commercial hindered phenolic antioxidant, Irganox 1010 (I1010) [ 21 , 22 ]. Unfortunately, the residual, long-term stability of the polyethylene containing the extract was quite small; thus, further study is needed to find an optimum solution for the use of this extract.…”

Section: Introductionmentioning

confidence: 99%

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Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition

et al. 2023

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Dry grape peel powder was extracted by three different techniques, stirred tank reactor, Soxhlet and ultrasound extraction. The composition, physical and chemical structure and inherent stability of the extracts were characterized by various methods. The extracts and reference compounds were added to polyethylene and their stabilization efficiency was determined in multiple extrusion experiments. The composition of the extracts was quite similar. Ten main compounds were identified in the extracts, which contained a considerable number of polyphenols, but only small amounts of quercetin and trans-resveratrol. The extracts proved to be more efficient processing stabilizers than trans-resveratrol and the commercial stabilizer, Irganox 1010, irrespective of the extraction technology used. In spite of their good processing stabilization effect, polymers containing the extracts had poor residual stability. The differences in processing and long-term stabilization must be related to the different structures of the polyphenols contained by the extracts and the reference compounds. The results clearly prove that the IC50 value determined by the DPPH assay is not suitable for the estimation of the efficiency of a compound as a stabilizer for polymers.

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Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition

et al. 2023

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“…Quercetin [16], dihydromyricetin [17], and rutin [18] provided sufficient melt stability for PE already at 50 ppm, and residual oxidative stability at 250 ppm additive content. Not only the pure compounds but also natural extracts have considerable stabilization efficiency; thus, sooner or later they will find their way into industrial practice [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and evaluation of a novel natural-based phosphine antioxidant for the thermal stabilization of polyethylene

Takács

Tátraaljai

Pregi

et al. 2022

J Therm Anal Calorim

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A new phosphine-type potential secondary stabilizer was synthesized successfully with large natural raw material content. The stabilizer is a waxy white powder with a relatively low melting temperature. Both the thermal and the storage stability of the stabilizer are sufficient for practical use. The new stabilizer was introduced into a Phillips-type high-density polyethylene, and its stabilizing efficiency was determined by multiple extrusions. Commercial phosphite and phosphonite stabilizers were used as references. The additive packages contained a primary antioxidant and a phosphorus compound, both added at 1000 ppm. The chemical structure of the polymer, viscosity, color, and residual stability were determined after each extrusion. The comparison of the stabilizing efficiency of the three secondary antioxidants showed that the phosphine stabilizer is at least as efficient as the phosphorous secondary stabilizers available in the market. The new stabilizer proved to be the most efficient in melt stabilization and in preventing discoloration; the residual stability of the polymer was similar in the presence of all three secondary antioxidants. This feasibility study proved that the new compound could be used as a potential stabilizer in practice.

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Estimation of the Mechanical Properties of Poly(3-hydroxybutyrate) from IR Data

Polyák,

Mackei,

Tóth

et al. 2023

J Polym Environ

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Despite the sustainability, biodegradability, and biocompatibility of microbial polyesters, as well as their potential to replace polyolefins, the market share of these biopolymers is still marginal. The primary factors that impede the success of microbial polyesters are related to their poor thermal stability and the degradation during processing that negatively affects the mechanical performance of the final product. Due to the complexity of the mechanism of degradation and the vast number of factors that influence the mechanism, the outcome of the degradation cannot be predicted with high confidence. Our present work addresses both difficulties. First, the thermal stability of poly(3-hydroxybutyrate) was successfully improved by a stabilizer system based on pomegranate extract. Second, we have developed a computational method that can be used for the estimation of the mechanical properties of processed microbial polyesters from IR data. The computational method is based on an unprecedented hybrid model that incorporates both linear and nonlinear components. The linear component is based on multivariate data analysis and quantizes the correlation between IR data and the extent of degradation. In contrast, the second component consists of a power function in order to be able to describe the nonlinear correlation between the extent of degradation and the mechanical properties. By using the hybrid model, indicators of mechanical performance, such as tensile strength, can be estimated from IR data, which was not achieved before.

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Stabilization of PE with Pomegranate Extract: Contradictions and Possible Mechanisms

Cited by 5 publications

References 39 publications

Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition

Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition

Synthesis and evaluation of a novel natural-based phosphine antioxidant for the thermal stabilization of polyethylene

Estimation of the Mechanical Properties of Poly(3-hydroxybutyrate) from IR Data

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