Application of antioxidant and ultraviolet absorber into HDPE: Enhanced resistance to UV irradiation

Jiang, Tiankai; Qi, Yanli; Wu, Yuchen; Zhang, Jun

doi:10.1515/epoly-2019-0053

Cited by 20 publications

(17 citation statements)

References 25 publications

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“…In our previous work, with the single addition of Irganox1010 or Irgafos168, the tensile strength decreased and the elongation at break decreased to nearly 0% when the sample was irradiated for 200 h 11 . With single addition of UV‐531 or UV‐326, the elongation at break of the sample can still be maintained at about 700% after irradiation for 600 h. When two different UV absorbers are used in combination with antioxidants, there are significant differences in mechanical properties.…”

Section: Resultsmentioning

confidence: 94%

“…In our previous work, the use of a single additive can improve the weatherability of the material, but not satisfied the needs of HDPE used outdoors for a longer time 11 . The antioxidant and UV absorber were separately added to the matrix HDPE, where HDPE added with antioxidant showed a significant decrease in mechanical properties after irradiation for 200 h 11 .…”

Section: Introductionmentioning

confidence: 97%

“…used outdoors for a longer time. 11 The antioxidant and UV absorber were separately added to the matrix HDPE, where HDPE added with antioxidant showed a significant decrease in mechanical properties after irradiation for 200 h. 11 In terms of the HDPE added with UV absorber, the sample can be aged to 600 h and still have good mechanical properties, yet it is not enough for the long-term use outdoors. Therefore, the improvement of UV resistance of HDPE with a single stabilizer is limited.…”

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confidence: 99%

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The effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE

Jiang

Mao

et al. 2021

Polymers for Advanced Techs

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In order to improve the aging resistance of HDPE, antioxidants (Irganox1010 and Irgafos168) are combined with UV absorber (UV‐326 or UV‐531). Analyses of ultraviolet–visible (UV–vis) and Fourier transform infrared spectroscopy show that UV‐326 has a better capacity of UV absorbance, but easier to migrate to the HDPE surface due to the bigger difference of solubility parameter with HDPE than UV‐531. The mechanical property indicates a better synergistic effect between UV‐531 and antioxidants. With the single addition of antioxidant, the mechanical property sharply decreased to low level during irradiation for 200 h. With single addition of UV absorber, the elongation at break of the sample can still be maintained at about 700% until irradiation for 600 h. When two different UV absorbers are used in combination with antioxidants, HDPE with UV‐326 maintains high mechanical property when irradiated for 1200 h, while the samples containing UV‐531 still maintain good mechanical property when irradiated for 1600 h.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 97%

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confidence: 99%

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The effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE

Jiang

Mao

et al. 2021

Polymers for Advanced Techs

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“…As shown in Fig. S2(f), the intense bands of LDPE were located at 2916 and 2847 cm −1 , which were assigned to the asymmetric and symmetric absorption of the CH 2 groups, respectively, while those at 1472 and 730 cm −1 were corresponded to the bending stretching and the inner rocking vibration of CH 2 groups, respectively 13,22 . After aging, new absorption peaks appeared at the shift of 1726 and 1600 cm −1 , which were attributed to the stretching vibration of C = O and C = C bonds, respectively 23 .…”

Section: Resultsmentioning

confidence: 97%

Investigation of hindered phenol antioxidant effects on the aging performance of cross-linked LDPE in the presence of copper

Li¹,

Zhou

et al. 2020

Sci Rep

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In this study, LDPE materials with different kinds of antioxidants were prepared by melt-blending method. To reveal the aging mechanism and the anti-oxidation efficiency of LDPE in the presence of copper, series of characterizations including tensile testing, Fourier transform infrared spectra (FTIR), differential scanning calorimetry (DSC), scanning electronic microscopy (SEM) and computation simulation were performed. The experimental results indicated that the aging process significantly decreased the tensile strength and elongation of those aged samples except 1024, which retarded the aging degradation of LDPE at the same condition. These results were further confirmed by the FTIR analysis with the carbonyl index values. Additionally, the melting peaks of DSC plots became broader and shifted to the lower temperatures during the aging process for S-0, S-3114 and S-1010, whereas no obvious changes were observed for S-1024. Importantly, according to the results obtained from computation simulation, a strong metal-ligand interaction between hydrazide group and copper ions was formed to prevent the further oxidation, which accounted for the excellent anti-oxidation behavior of 1024 for LDPE in the presence of copper. Comparing with general organic polyolefin, polyethylene (PE) has excellent temperature resistance, electrical insulation, dielectric properties and weather resistance due to its long chains with regular CH 2 units. Over the past decades, PE materials have been widely used in various areas, such as medical and health, aerospace, wire and cable, automotive industry, architecture and so on 1-4. Unfortunately, it was found that the chemical structure and composition of PE can be significantly destroyed as a result of the comprehensive factors including crosslinking byproducts, metal impurities, ionic impurities, electrical and mechanical effects, moisture, and chemical substances, which result in the failure of the insulation performance 5,6. For example, it has been reported that thermal aging can lead to the deterioration of electrical and mechanical properties of PE insulation 3,7,8. As discussed above, the introduced metal impurities by the process of manufacturing or the operating can lead to the degradation or even failure of PE insulation 3. The metallic impurities consisting of copper powders, originated from the conductor or the ground water, could form heterocharges, which play a role of enhancing the electric stress and promoting the initiation of water tress, and thus decreasing the strength of the PE insulation. As claimed by Gillen 9 , copper powders could diffuse in ethylene propylene rubber(EPR) insulation matrix during the extrusion process, which can account for the degradation of insulation materials during the thermal aging. The introduction of antioxidant into hydrotalcite can shorten the oxidation induction time, which was indicative of the protective action towards oxidation of polymer, whereas, the impurity of hydrotalcite and metal ions can increase the rate of polypropylene photo...

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“…Moreover, hydroxyl radicals (OH•) could be formed from air moisture and oxygen during irradiation [30][31][32]. Subsequently, the oxygen anions and hydroxyl radicals could react to form hydroxyl groups in the HDPE backbone chain [33][34][35][36]. Therefore, the increased formation of unsaturated ketone compound (alkenyl group) at a higher absorbed dose rate led to a higher tendency of hydroxyl groups to be formed compared to ketone compound (carbonyl group) in the irradiated HDPE.…”

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 99%

Influences of Absorbed Dose Rate on the Mechanical Properties and Fiber–Matrix Interaction of High-Density Polyethylene-Based Carbon Fiber Reinforced Thermoplastic Irradiated by Electron-Beam

Park

Choi

et al. 2020

Polymers

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In this study, a high-density polyethylene (HDPE)-based carbon fiber-reinforced thermoplastic (CFRTP) was irradiated by an electron-beam. To assess the absorbed dose rate influence on its mechanical properties, the beam energy and absorbed dose were fixed, while the absorbed dose rates were varied. The tensile strength (TS) and Young’s modulus (YM) were evaluated. The irradiated CFRTP TS increased at absorbed dose rates of up to 6.8 kGy/s and decreased at higher rates. YM showed no meaningful differences. For CFRTPs constituents, the carbon fiber (CF) TS gradually increased, while the HDPE TS decreased slightly as the absorbed dose rates increased. The OH intermolecular bond was strongly developed in irradiated CFRTP at low absorbed dose rates and gradually declined when increasing those rates. X-ray photoelectron spectroscopy analysis revealed that the oxygen content of irradiated CFRTPs decreased with increasing absorbed dose rate due to the shorter irradiation time at higher dose rates. In conclusion, from the TS viewpoint, opposite effects occurred when increasing the absorbed dose rate: a favorable increase in CF TS and adverse decline of attractive hydrogen bonding interactions between HDPE and CF for CFRTPs TS. Therefore, the irradiated CFRTP TS was maximized at an optimum absorbed dose rate of 6.8 kGy/s.

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Application of antioxidant and ultraviolet absorber into HDPE: Enhanced resistance to UV irradiation

Cited by 20 publications

References 25 publications

The effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE

The effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE

Investigation of hindered phenol antioxidant effects on the aging performance of cross-linked LDPE in the presence of copper

Influences of Absorbed Dose Rate on the Mechanical Properties and Fiber–Matrix Interaction of High-Density Polyethylene-Based Carbon Fiber Reinforced Thermoplastic Irradiated by Electron-Beam

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