The effect of artificial weathering and hardening on mechanical properties of HDPE with and without UV stabilizers

Koriem, A.; Ollick, A.M.; Elhadary, M.

doi:10.1016/j.aej.2021.03.024

Cited by 18 publications

(12 citation statements)

References 26 publications

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“…A significant improvement in tensile properties after accelerated weathering was slightly surprising as previous studies [27,28] has shown that mechanical properties tend to remain at their original level as a result of the use of UV stabilizers. But it has been also reported an increase of 40% in the modulus of elasticity for HDPE after 1300 h accelerated weathering [33]. Generally, the variations in protection ability of the studied UV stabilizers can be explained with the different protection mechanisms of the studied UV stabilizers.…”

Section: Resultsmentioning

confidence: 94%

“…However, both the UV stabilizers are well suitable for the UV protection of plastic blends. As with pure plastics [33,34], the most effective UV protection for plastic blends is probably achieved with a combination of different UV stabilizers.…”

Section: Resultsmentioning

confidence: 99%

“…5. The elongation at break is typically considered as a good parameter to represent the effect of aging on polymers [33].…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Ultraviolet Light Stabilizers on Color Stability, Melt Properties and Tensile Properties of Mixed Waste Plastics Blends

Hyvärinen

Lagern

Kärki

2022

AMR

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Plastic waste disposal is among the most challenging problems of the current era. Therefore, new methods and applications for the utilization of waste plastics are increasingly needed. To find them, it is essential to research and develop the material properties of recycled plastics. The effect of different ultraviolet light (UV) stabilizers on the color stability, melt properties and tensile properties of mixed waste plastics blends was studied in this paper. The mixed waste plastics collected from two different waste sources were prepared as specimens by injection molding, and studied with two different types and loading amounts of UV stabilizers. UV absorbers (UVAs) and hindered amine light stabilizers (HALS) were used as UV stabilizers. A specimen produced without the addition of a UV stabilizer was used as a reference specimen of both the blends. After the accelerated weathering, the addition of a UVA provided an improved, smaller change in color than the addition of HALS. Among the tensile properties, the addition of UV stabilizers clearly improved the tensile strength and tensile modulus for almost all the studied specimens. Additionally, the melt properties of both the studied plastic blends were found to be increased by the addition of UV stabilizers.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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The Effect of Ultraviolet Light Stabilizers on Color Stability, Melt Properties and Tensile Properties of Mixed Waste Plastics Blends

Hyvärinen

Lagern

Kärki

2022

AMR

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“…For instance, weathering of high-density polyethylene (HDPE) stabilised with UV absorbers, under accelerated weathering using a Xenon lamp (generally following ASTM G155), showed that the non-stabilised HDPE was embrittled, with its tensile strength extensibility reducing to 21%, in 300 h of exposure, while the UV-stabilised HDPE was stable up to 900 h of exposure [ 17 ]. However, the combination of a UV-absorber (0.15 wt%) with the radical-quencher hindered amine stabilisers (HALS) used at 0.45 wt%, yields synergistic stabilisation with little degradation up to 1300 h of exposure.…”

Section: Introductionmentioning

confidence: 99%

Effects of UV radiation on natural and synthetic materials

Andrady

Heikkilä

Pandey³

et al. 2023

Photochem Photobiol Sci

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The deleterious effects of solar ultraviolet (UV) radiation on construction materials, especially wood and plastics, and the consequent impacts on their useful lifetimes, are well documented in scientific literature. Any future increase in solar UV radiation and ambient temperature due to climate change will therefore shorten service lifetimes of materials, which will require higher levels of stabilisation or other interventions to maintain their lifetimes at the present levels. The implementation of the Montreal Protocol and its amendments on substances that deplete the ozone layer, controls the solar UV-B radiation received on Earth. This current quadrennial assessment provides a comprehensive update on the deleterious effects of solar UV radiation on the durability of natural and synthetic materials, as well as recent innovations in better stabilising of materials against solar UV radiation-induced damage. Pertinent emerging technologies for wood and plastics used in construction, composite materials used in construction, textile fibres, comfort fabric, and photovoltaic materials, are addressed in detail. Also addressed are the trends in technology designed to increase sustainability via replacing toxic, unsustainable, legacy additives with ‘greener’ benign substitutes that may indirectly affect the UV stability of the redesigned materials. An emerging class of efficient photostabilisers are the nanoscale particles that include oxide fillers and nanocarbons used in high-performance composites, which provide good UV stability to materials. They also allow the design of UV-shielding fabric materials with impressive UV protection factors. An emerging environmental issue related to the photodegradation of plastics is the generation of ubiquitous micro-scale particles from plastic litter exposed to solar UV radiation. Graphical abstract

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“…This will encourage more oxygen uptake and speed up the oxidation of PE chains. As polyethylene degrades, it undergoes the Norrish reaction that creates free radical, terminal vinyl groups and ketone groups and causes the main-chain scission of the polymer [ 24 ]. Then, free radicals and oxygen combine to form peroxy radicals, which ultimately transformed to peroxide.…”

Section: Introductionmentioning

confidence: 99%

Blending of Low-Density Polyethylene and Poly(Butylene Succinate) (LDPE/PBS) with Polyethylene–Graft–Maleic Anhydride (PE–g–MA) as a Compatibilizer on the Phase Morphology, Mechanical and Thermal Properties

et al. 2023

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It is of significant concern that the buildup of non-biodegradable plastic waste in the environment may result in long-term issues with the environment, the economy and waste management. In this study, low-density polyethylene (LDPE) was compounded with different contents of poly(butylene succinate) (PBS) at 10–50 wt.%, to evaluate the potential of replacing commercial plastics with a biodegradable renewable polymer, PBS for packaging applications. The morphological, mechanical and thermal properties of the LDPE/PBS blends were examined in relation to the effect of polyethylene–graft–maleic anhydride (PE–g–MA) as a compatibilizer. LDPE/PBS/PE–g–MA blends were fabricated via the melt blending method using an internal mixer and then were compression molded into test samples. The presence of LDPE, PBS and PE–g–MA individually in the matrix for each blend presented physical interaction between the constituents, as shown by Fourier-transform infrared spectroscopy (FTIR). The morphology of LDPE/PBS/PE–g–MA blends showed improved compatibility and homogeneity between the LDPE matrix and PBS phase. Compatibilized LDPE/PBS blends showed an improvement in the tensile strength, with 5 phr of compatibilizer providing the optimal content. The thermal stability of LDPE/PBS blends decreased with higher PBS content and the thermal stability of compatibilized blends was higher in contrast to the uncompatibilized blends. Therefore, our research demonstrated that the partial substitution of LDPE with a biodegradable PBS and the incorporation of the PE–g–MA compatibilizer could develop an innovative blend with improved structural, mechanical and thermal properties.

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The effect of artificial weathering and hardening on mechanical properties of HDPE with and without UV stabilizers

Cited by 18 publications

References 26 publications

The Effect of Ultraviolet Light Stabilizers on Color Stability, Melt Properties and Tensile Properties of Mixed Waste Plastics Blends

The Effect of Ultraviolet Light Stabilizers on Color Stability, Melt Properties and Tensile Properties of Mixed Waste Plastics Blends

Effects of UV radiation on natural and synthetic materials

Blending of Low-Density Polyethylene and Poly(Butylene Succinate) (LDPE/PBS) with Polyethylene–Graft–Maleic Anhydride (PE–g–MA) as a Compatibilizer on the Phase Morphology, Mechanical and Thermal Properties

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