Effect of UV-irradiation on the optical properties of transparent PET polymeric foils

Nair, Aneesh; Sharma, Piyush; Sharma, Vishal; Diwan, P.K.

doi:10.1016/j.matpr.2020.01.330

Cited by 5 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absorption curve for the rPETb polymer film shows a smooth increase with increasing UV irradiation time, possibly due to the energy supplied to the covalent bonds in the polymers by UV photons during irradiation, resulting in the formation of ion pairs by bond scission. [40] Similarly, in the case of PP, we observe changes at the edge of the absorption spectrum in the wavelength range from 284 to 320 nm in irradiated samples, indicating a photochemical reaction within the PP film. In addition, an increased absorption curve in UVCirradiated samples typically indicates the formation of new chemical species or the modification of existing species.…”

Section: Resultssupporting

confidence: 59%

“…Figure 2 shows the results of the absorption studies performed on irradiated rPETb and PP film samples in both water and ethanol. The absorption curve for the rPETb polymer film shows a smooth increase with increasing UV irradiation time, possibly due to the energy supplied to the covalent bonds in the polymers by UV photons during irradiation, resulting in the formation of ion pairs by bond scission [40] . Similarly, in the case of PP, we observe changes at the edge of the absorption spectrum in the wavelength range from 284 to 320 nm in irradiated samples, indicating a photochemical reaction within the PP film.…”

Section: Resultsmentioning

confidence: 63%

See 1 more Smart Citation

UV Irradiation of Polyethylene Terephthalate and Polypropylene and Detection of Formed Microplastic Particles Down to 1 μm

Mikac,

Csáki,

Zentai

et al. 2023

ChemPlusChem

View full text Add to dashboard Cite

We investigated the degradation of plastics upon UVC irradiation in aqueous solution and the formation of microplastic (MP) particles. We irradiated polypropylene (PP) and recycled and virgin polyethylene terephthalate (PET) with a UV lamp emitting at 254 nm. Irradiation was performed for 15 and 30 min, respectively, at an intensity of about 0.3 W cm‐2. The formation of MP was studied by Raman spectroscopy. The results showed that MP particles were formed after irradiation and that their number was significantly higher in the recycled PET than in the virgin material. The number of PP MP formed was lower compared to PET and was not significantly different after 15 and 30 min. In addition, ethanol was used as an alternative solvent to investigate how its chemical properties and interactions with UVC irradiation affect the degradation of PET and PP plastics. The use of ethanol and recycled PET resulted in a lower number of MP particles at both irradiation times. When ethanol was used after 30 min of irradiation, significantly more PP MP formed. The different chemical structures of PET and PP combined with the different solvent properties of water and ethanol contribute to the differences in their susceptibility to UVC degradation.

show abstract

Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 63%

UV Irradiation of Polyethylene Terephthalate and Polypropylene and Detection of Formed Microplastic Particles Down to 1 μm

Mikac,

Csáki,

Zentai

et al. 2023

ChemPlusChem

View full text Add to dashboard Cite

show abstract

“…The decrease in E g upon irradiation might be owing to the formation of ion pairs due to bond cleavage and the resulting cross-linking and/or chain scission in the polymers by UV irradiation. 57,58 It is also noted that the band gaps for both the pristine and COC-UV 10 min film decrease with the temperature up to 150 1C. The reason might lie in that the increasing temperature leads to an increase in the vibration of the chain segment, which will cause the edge of the energy band to extend and thus narrow the band gap.…”

Section: Resultsmentioning

confidence: 95%

Significantly enhanced high-temperature capacitive energy storage in cyclic olefin copolymer dielectric films via ultraviolet irradiation

et al. 2023

View full text Add to dashboard Cite

show abstract

“…This leads to the degradation of a thin surface layer, which limits oxygen diffusion and superficial light absorption [9]. In reference [10], the optical energy gap of un-irradiated and irradiated PET samples at different wavelengths was determined using UV-Visible spectra. The molecular bond structure was analyzed before and after UV-irradiation.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Mechanical Properties of A-PET Films after UV Aging

Vasylius,

Tadžijevas,

Šapalas

et al. 2023

Polymers

View full text Add to dashboard Cite

In 2018, the European Commission adopted the European Strategy for Plastics in a Circular Economy, which outlines key actions to reduce the negative impact of plastic pollution. The strategy aims to expand plastic recycling capacity and increase the proportion of recycled materials in plastic products and packaging. Using recycled plastic can save 50–60% energy compared to virgin plastic. Recycled PET can be used in the production of A-PET films, which are predominantly used in thermo-vacuum forming for food packaging. Storage conditions can influence the mechanical properties of polymer materials. This work presents changes in the mechanical properties of A-PET films after UV irradiation. An experimental investigation of the UV aging of A-PET films was conducted in a UV aging chamber. The specimens were exposed to a UV radiation dose rate of 2.45 W/m2 for 1, 2, 4, 8, 16, 24, 32, and 40 h. UV measurements were also taken on a sunny day to compare the acceleration of UV irradiation in the UV aging chamber. Mechanical tensile tests were performed on two different three-layer A-PET films (100% virgin and 50% recycled). The tensile strength and relative elongation of the A-PET films were determined, and the work required to break the film was calculated. The total consumed work was divided into the work needed for elastic and plastic deformations. A study of the UV aging of A-PET films confirmed a significant effect on the films, including a loss of plasticity even after brief exposure to solar irradiance. The results of the puncture impact test further confirmed the deterioration of the mechanical properties of A-PET material due to exposure to UV radiation, with a greater effect observed for the recycled material.

show abstract

Effect of UV-irradiation on the optical properties of transparent PET polymeric foils

Cited by 5 publications

References 6 publications

UV Irradiation of Polyethylene Terephthalate and Polypropylene and Detection of Formed Microplastic Particles Down to 1 μm

UV Irradiation of Polyethylene Terephthalate and Polypropylene and Detection of Formed Microplastic Particles Down to 1 μm

Significantly enhanced high-temperature capacitive energy storage in cyclic olefin copolymer dielectric films via ultraviolet irradiation

Degradation of Mechanical Properties of A-PET Films after UV Aging

Contact Info

Product

Resources

About