Effect of ultraviolet radiation in the photo-oxidation of High Density Polyethylene and Biodegradable Polyethylene films

Martínez-Romo, A.; Mota, R González; Bernal, J.J. Soto; Reyes, C Frausto; Candelas, I Rosales

doi:10.1088/1742-6596/582/1/012026

Cited by 24 publications

(11 citation statements)

References 20 publications

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“…A further shift in the peak was observed at 2877.05 cm −1 when the HDPE sheet was treated with NS4 fungal culture. Martinez-Romo et al 39. observed a similar shift in the peak on photodegradation of HDPE.…”

Section: Resultsmentioning

confidence: 59%

Evaluation of HDPE and LDPE degradation by fungus, implemented by statistical optimization

Ojha

Pradhan

Singh

et al. 2017

Sci Rep

257

107

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Plastic in any form is a nuisance to the well-being of the environment. The ‘pestilence’ caused by it is mainly due to its non-degradable nature. With the industrial boom and the population explosion, the usage of plastic products has increased. A steady increase has been observed in the use of plastic products, and this has accelerated the pollution. Several attempts have been made to curb the problem at large by resorting to both chemical and biological methods. Chemical methods have only resulted in furthering the pollution by releasing toxic gases into the atmosphere; whereas; biological methods have been found to be eco-friendly however they are not cost effective. This paves the way for the current study where fungal isolates have been used to degrade polyethylene sheets (HDPE, LDPE). Two potential fungal strains, namely, Penicillium oxalicum NS4 (KU559906) and Penicillium chrysogenum NS10 (KU559907) had been isolated and identified to have plastic degrading abilities. Further, the growth medium for the strains was optimized with the help of RSM. The plastic sheets were subjected to treatment with microbial culture for 90 days. The extent of degradation was analyzed by, FE-SEM, AFM and FTIR. Morphological changes in the plastic sheet were determined.

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Section: Resultsmentioning

confidence: 59%

Evaluation of HDPE and LDPE degradation by fungus, implemented by statistical optimization

Ojha

Pradhan

Singh

et al. 2017

Sci Rep

257

107

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“…This is due to the photooxidation reaction taking place. During photooxidation, the energies of 390 and 300 kJ/mol of 300‐ and 400‐nm photos are sufficient to break CC and CH bonds, leading to deterioration of polymer . The rupturing of the bond leads to the formation of macroradicals active in nature.…”

Section: Resultsmentioning

confidence: 99%

“…During photooxidation, the energies of 390 and 300 kJ/mol of 300and 400-nm photos are sufficient to break C-C and C-H bonds, leading to deterioration of polymer. 23,24 The rupturing of the bond leads to the formation of macroradicals active in nature. When degradation is carried out with exposure to air, oxygen, being biradical in nature, has strong tendency to attach on to these radicals generated, leading to the formation of ketonic groups including carboxylic acid, methylketone, esters, peroxyester, and vinyls (Figure 8).…”

Section: Aging Studiesmentioning

confidence: 99%

Enhancement of mechanical and barrier properties of LLDPE composite film via PET fiber incorporation for agricultural application

Kumar

Wadgaonkar

Mehta

et al. 2019

Polymers for Advanced Techs

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A study was conducted to determine the potential of linear low‐density polyethylene (LLDPE)‐PET fiber composite films to be used as an agricultural mulching film. Incorporation of 1 wt% PET fiber into the LLDPE matrix improved the tensile strength and percent elongation. The water vapor transmission rate was significantly lowered because of the presence of PET fibers. Also, the effect of continuous exposure of films to pesticide and UV light has been reported in terms of deterioration of mechanical and optical properties of the films. Differential scanning calorimetry shows that there is no effect of the presence of PET fibers on processing temperature of LLDPE at optimized loading; however, it was found that it lowers the latent heat of fusion and crystallization.

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“…In addition to the humidity, ultraviolet (UV) radiation is another source of degradation for polymers and composites. It is frequently reported [16,17] that photo-oxidation, as a result of UV radiation, changes the physical properties of polymers, such as discoloration and increase in the glass transition temperature, and reduces their mechanical performance. Such behavior should also be considered when using polymers and composites in a structure.…”

Section: Introductionmentioning

confidence: 99%

Durability of Metal-Composite Friction Spot Joints under Environmental Conditions

Goushegir¹,

Scharnagl

Santos³

et al. 2020

Materials

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The current paper investigates the durability of the single-lap shear aluminum-composite friction spot joints and their behavior under harsh accelerated aging as well as natural weathering conditions. Four aluminum surface pre-treatments were selected to be performed on the joints based on previous investigations; these were sandblasting (SB), conversion coating (CC), phosphoric acid anodizing (PAA), and PAA with a subsequent application of primer (PAA-P). Most of the pre-treated specimens retained approximately 90% of their initial as-joined strength after accelerated aging experiments. In the case of the PAA pre-treatment, the joint showed a lower retained strength of about 60%. This was explained based on the penetration of humidity into the fine pores of the PAA pre-treated aluminum, reducing the adhesion between the aluminum and composite. Moreover, friction spot joints produced with three selected surface pre-treatments were held under outside natural weathering conditions for one year. PAA-P surface pre-treated specimens demonstrated the best performance with a retained strength of more than 80% after one year. It is believed that tight adhesion and chemical bonding reduced the penetration of humidity at the interface between the joining parts.

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Effect of ultraviolet radiation in the photo-oxidation of High Density Polyethylene and Biodegradable Polyethylene films

Cited by 24 publications

References 20 publications

Evaluation of HDPE and LDPE degradation by fungus, implemented by statistical optimization

Evaluation of HDPE and LDPE degradation by fungus, implemented by statistical optimization

Enhancement of mechanical and barrier properties of LLDPE composite film via PET fiber incorporation for agricultural application

Durability of Metal-Composite Friction Spot Joints under Environmental Conditions

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