On the influence of sands on low density polyethylene photodegradation

Sanchez-Solis, A.; Estrada, Mirna R.

doi:10.1016/0141-3910(96)00030-4

Cited by 30 publications

(11 citation statements)

References 10 publications

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“…After 72 hours of exposure to visible The degree of crystallinity showed an increase according to the exposure time to ultraviolet radiation. This fact reinforces the hypothesis that fragments of molecules in the amorphous region and of binding molecules which are rearranged on the crystallites, causing an increase in the degree of crystallinity of polymer material [22] .…”

Section: Fourier Transformed Infrared Spectroscopy (Ftir)supporting

confidence: 72%

Evaluation of photodegradation in LDPE/modified starch blends

et al. 2009

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Photodegradation of LDPE/modified starch blends 80/20 m/m has been examined by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X ray diffraction (DRX) before and after exposure to ultraviolet radiation (UV). Samples were exposed to UV in the laboratory for periods of 6, 24, 48 and 60 hours. The main alteration in the polymeric material after exposure to the radiation was a decrease in the mechanical properties, tensile strength and elongation. There were also changes in the chemical structure of the blend with an increase in the carbonyl and vinyl indices, 65.58 and 53.29%, respectively. The analysis of the blend crystallinity pointed to the formation of a new crystalline symmetry that did not exist before the irradiation

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Section: Fourier Transformed Infrared Spectroscopy (Ftir)supporting

confidence: 72%

Evaluation of photodegradation in LDPE/modified starch blends

et al. 2009

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“…Re-stabilization during the melt reprocessing is the most effective, economical, and reliable method of dealing with plastics recycling. [3][4][5][6][7][8][9][10][11] Of course, the stabilizers can slow the degradation kinetic better can prevent the degradation and then hinder the loss of properties, but cannot enhance the properties with respect to those of the post-consumer plastic. In order to enhance the properties of the recycled plastics, some rebuilding of the molecular structure partly degraded during the use is necessary.…”

Section: Introductionmentioning

confidence: 99%

Re‐Gradation of Photo‐Oxidized Post‐Consumer Greenhouse Films

Mantia

Dintcheva

2005

Macromol. Rapid Commun.

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Summary: The degradation undergone by the polymers during their use and because of the thermo‐mechanical degradation undergone during the reprocessing operations provokes, among other effects, the decrease of the molecular weight. The change of the molecular architecture is responsible for the deterioration of all the properties. In order to restore the properties of post‐consumer recycled plastics, some rebuilding of the molecular structure is necessary. In this work, photo‐oxidized films for greenhouses were reprocessed in presence of additives able to react with the polyethylene in order to form branching and cross‐linking, improving the properties of these post‐consumer plastic.

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“…6 Mine and beach sands were incorporated into low density polyethylene. 21 The polymer containing mine sand retained better mechanical properties when exposed to UV radiation at 300 nm than did the polymer containing beach sand. 21 Particulate polytetrafluoroethylene added to LDPE increased its resistance to UV radiation.…”

Section: Fillers and Reinforcing Fibersmentioning

confidence: 95%

“…21 The polymer containing mine sand retained better mechanical properties when exposed to UV radiation at 300 nm than did the polymer containing beach sand. 21 Particulate polytetrafluoroethylene added to LDPE increased its resistance to UV radiation. 27 Tensile strength was reduced by one half and toughness by two thirds when polyethylene containing wood flakes was exposed for 205 days.…”

Section: Fillers and Reinforcing Fibersmentioning

confidence: 95%

Effect of Additives on Weathering

Wypych¹

2013

Handbook of Material Weathering

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On the influence of sands on low density polyethylene photodegradation

Cited by 30 publications

References 10 publications

Evaluation of photodegradation in LDPE/modified starch blends

Evaluation of photodegradation in LDPE/modified starch blends

Re‐Gradation of Photo‐Oxidized Post‐Consumer Greenhouse Films

Effect of Additives on Weathering

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