Interaction of polyethylene with ozone

Kefeli, A.A.; Разумовский, С. Д.; Zaikov, G.Ye.

doi:10.1016/0032-3950(71)90288-7

Cited by 27 publications

(20 citation statements)

References 3 publications

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“…It is also observed that for the ozonated films no new peaks were detected in the wavenumber range of 3200 –3700 cm −1 . The absence of new peaks in this wavenumber range indicates either very low concentration or absence of alcohol functional groups in the ozonation products 6…”

Section: Resultsmentioning

confidence: 97%

“…Exposure of PE to ozone results in generation of active peroxide groups on the PE surfaces. The peroxide groups can then initiate radical graft polymerization of vinyl monomers with hydrophilic groups, resulting in hydrophilic surfaces 1, 5, 6. Comparing with other surface modification techniques such as plasma treatment, UV‐radiation, etc., ozonation is relatively inexpensive and it can introduce peroxide groups uniformly on the surfaces of different PE products even with complicated shapes 1, 7, 8…”

Section: Introductionmentioning

confidence: 99%

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An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

Mastan

Doan

2012

J of Applied Polymer Sci

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For a conventional polyethylene film, ozonation was conducted to increase its surface hydrophilicity. Copper sulfate was found effective as a catalyst in aqueous ozonation to increase the generation of surface peroxides significantly, which is the essential step for hydrophilicity enhancement. The percentage increase in peroxide generation could range from 41% to 58% by aqueous catalytic ozonation over its noncatalyzed gaseous counterpart. The optimum concentration of copper sulfate was found to be 0.05 g/L. After adding the catalyst, the length of ozonation could be significantly reduced so that the bulk mechanical strength of the films, represented by tensile strength, could be well preserved after ozonation. A novel kinetic model for the aqueous ozonation was proposed. This model was developed by combing the reaction mechanism of gaseous ozonation of polyethylene films with that of ozone self-decomposition in water. The peroxide generation also increased with the applied ozone dose. The surface morphology and contact angle of the film were all examined before and after ozonation.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

Mastan

Doan

2012

J of Applied Polymer Sci

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“…The concentration change of radicals in the course of photooxidation, ozonization, and photoozonization is shown in Figure 5. A rapid decrease of these radicals has been also observed during ozonization and photoozonization of pure piperidinoxy radicals (11) (Fig. 6).…”

Section: ) N -O '~( C 4 H G ) Z + N -O O 'mentioning

confidence: 61%

“…The hindered piperidine (2,2,6,6-tetramethylpiperidine) (I) from Lanssen Chimica (Belgium), piperidinoxy radical (2,2,6,6-tetramethylpiperidino-l-oxy) (11) Ultraviolet/visible (UV/VIS) and infrared (IR) absorption spectra are recorded with a Perkin-Elmer 575 UV/VIS spectrometer and a Perkin-Elmer 1710 IR Fourier transform spectrometer, respectively.…”

Section: Methodsmentioning

confidence: 99%

The role of hindered piperidine (HALS) compounds for the stabilization of polypropylene against oxidation reactions caused by ozone and oxidative products formed during photolysis of ozone

Lucki

Rabek

Rånby

et al. 1988

J of Applied Polymer Sci

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SynopsisThe role of hindered piperidine (HALS) photostabilizers for the photostabilization of polypropylene films against oxidative reactions caused by ozone and oxidative species formed during photolysis of ozone under UV irradiation (i.e., atomic oxygen and singlet oxygen) has been investigated and discussed. It has been found that ozonization and/or photoozonization of 2,2,6,6-tetramethyl-piperidine (I) and piperidinoxy radical (2,2,6,6-tetramethylpiperidino-l-oxy) (11) gives a high yield (91-988) 2,6-dimethyl-2-hydroxy-6-nitro-heptane. Ozonization and/or photoozonization of HAIS probably occur by a similar mechanism as reported for (I) and (11). HALS photostabilizer reacts with ozone and/or photolysis products of ozone (atomic oxygen and/or singlet oxygen) and loses its function in the photostabilization process. For that reason protection of polypropylene against photooxidative degradation and photoozonization is of great commercial importance.

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“…It has been reported that prolonged exposure of PE films to ozone results in peroxy‐radicals as shown in Scheme . The peroxy‐radicals further undergo rearrangement possibly resulting in aldehydes, ketones, and acids etc.…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Membranes for Water Remediation with Controlled Leaching of Biocidal Silver Aided by Prior Grafting of Poly(ethylene imine) on to Ozone‐Treated Polyethylene

et al. 2017

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We describe a novel strategy to control the release of silver from polyethylene‐based water purification membranes by suitably modifying the membrane surface by a biocidal macromolecule (poly(ethylene imine), PEI) before depositing silver on the surface. The PE membranes were first treated with ozone and then PEI was covalently grafted. The distribution of silver was mapped by EDAX, and the antibacterial activity assessed by standard plate count method and by estimating the reactive oxygen species. The new membrane allows controlled release of silver ions which otherwise would contaminate the water source if used in excess. Leaching in the final permeate is lower than 0.03 ppm opening the route to antibacterial polyolefin‐based membranes for water decontamination.

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Interaction of polyethylene with ozone

Cited by 27 publications

References 3 publications

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

An investigation into surface modification of polyethylene films for hydrophilicity enhancement by catalytic ozonation

The role of hindered piperidine (HALS) compounds for the stabilization of polypropylene against oxidation reactions caused by ozone and oxidative products formed during photolysis of ozone

Antibacterial Membranes for Water Remediation with Controlled Leaching of Biocidal Silver Aided by Prior Grafting of Poly(ethylene imine) on to Ozone‐Treated Polyethylene

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