Investigating the Degradability of HDPE, LDPE, PE-BIO, and PE-OXO Films under UV-B Radiation

Martínez-Romo, A.; González‐Mota, Rosario; Soto‐Bernal, Juan José; Rosales-Candelas, I.

doi:10.1155/2015/586514

Cited by 82 publications

(57 citation statements)

References 36 publications

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“…The absorption of energy by heating might cause reversible or irreversible modification of physical and chemical properties of samples by oxidation. Similar studies performed by ESR method on UV-irradiated polystyrene showed possible ionization and breaking of chemical bonds of the polymeric chains, [1]. Gamma irradiation of such materials induces a crystallization effect, as confirmed by NMR, [2].…”

Section: Introductionmentioning

confidence: 70%

XRD and IR Investigations of Some Commercial Polystyrene Samples Thermally Degraded

Niculăescu¹,

Olar²,

Ştefan³

et al. 2018

Studia UBB Chemia

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Thermal degradation of commercial polystyrene was investigated by XRD and FT-IR metods. The samples were heated 30 minutes at temperatures 140ºC, 200ºC, 250ºC, 300ºC and 350ºC and then brought back to room temperature. XRD investigation denotes structural modification for samples heated above 200ºC. This modification is confirmed by FT-IR measurments. Some vibration bands are affected by thermal degradation at temperatures higher than 200ºC. Both FT-IR and XRD methods reveal modification of microscopic structure of the polystyrene submitted to thermal degradation.

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Section: Introductionmentioning

confidence: 70%

XRD and IR Investigations of Some Commercial Polystyrene Samples Thermally Degraded

Niculăescu¹,

Olar²,

Ştefan³

et al. 2018

Studia UBB Chemia

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“…Initially, due to their outdoor durability, polymers were considered as an alternative to replace other types of materials [4]. Currently, the mentioned advantages have also caused an adverse environmental impact which is evidenced in landfills with a massive volume of plastic waste [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Prodegradant-Additive Plastics Incorporated on the Polyethylene Recycling

Aldás

Paladines

Valle

et al. 2018

International Journal of Polymer Science

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The effect of degraded plastic with prodegradants on the polyethylene properties was studied. First, the mixture of low-density polyethylene (LDPE) with 5 wt.% prodegradant (oxo-degradable) additive was prepared by melt processing using a mixer chamber. Then, the degradation of the mixtures was evaluated by exposing the oxo-degradable LDPE in a Xenon arc chamber for 300 hours. The degraded material was characterized by infrared spectroscopy (FTIR) assessing the carbonyl index and the hydroperoxide band. Then, different percentages of degraded material (1, 5, 10, 20, and 50 wt.%) were incorporated into the neat LDPE. Mechanical and rheological tests were carried out to evaluate the recycling process of these blends. Also, the feasibility of the blends reprocessing was determined by analysing the melt flow index for each heating process and shear stress applied. It was evidenced that the increment of the content of the degraded material in the neat LDPE decreased the mechanical strength and the processability of blends due to the imminent thermal degradation. All the test results showed that the incorporation of degraded material causes a considerable reduction in the matrix properties during the reprocessing. Nevertheless, at low concentrations, the properties of the oxo-degradable LDPE-LDPE blends were found to be similar to the neat LDPE.

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“…Lastly, we must mention the most important index used in order to quantify the degree of photodegradation of polyolefin composites, namely the carbonyl index (CI) [15,16]. This index is calculated from the ratio between the absorbance of carbonyl groups (generated during photodegradation) stretching vibrations and the absorbance of methylene scissoring (characteristic to polyolefin materials): In all the cases, CI increases during exposure to light due to the photo-oxidative processes, as can be observed from the figure 8.…”

Section: Polyethylene Photodegradationmentioning

confidence: 99%

Photocatalytic Degradation of Some Polyolefin-TiO2 Composites Evaluated by Molecular Spectroscopy

Rădiţoiu¹,

Rădiţoiu²,

Raduly³

et al. 2019

Mat.Plast.

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The photochemical degradation of polyolefin-TiO2 composite films was investigated and described in relationship with the concentration of photocatalyst and after different exposure times. UV-Vis-NIR and IR spectra reveal the presence of various degradation products, which are in direct connection with the photodecomposition mechanism. Various ratios between the absorbance of some typical IR characteristic bands can lead to the evaluation of photocomposition of polyethylene and polypropylene composite films containing TiO2 nanoparticles.The results show that the photocatalytic degradation of composites is significantly faster than the simple photolytic decomposition of pure polypropylene and polyethylene and could be used as a solution for the destruction of this type of wastes.

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Investigating the Degradability of HDPE, LDPE, PE-BIO, and PE-OXO Films under UV-B Radiation

Cited by 82 publications

References 36 publications

XRD and IR Investigations of Some Commercial Polystyrene Samples Thermally Degraded

XRD and IR Investigations of Some Commercial Polystyrene Samples Thermally Degraded

Effect of the Prodegradant-Additive Plastics Incorporated on the Polyethylene Recycling

Photocatalytic Degradation of Some Polyolefin-TiO2 Composites Evaluated by Molecular Spectroscopy

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