Comparison of UV-degradation depth-profiles in polyethylene, polypropylene and an ethylene–propylene copolymer

Shyichuk, Alexander; White, J. R.; Craig, I.H.; Syrotynska, Iryna

doi:10.1016/j.polymdegradstab.2004.12.006

Cited by 46 publications

(19 citation statements)

References 29 publications

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“…Similar results were observed in a study using PP pellets as sorbents to remove organics from water solution; pyrene appeared to be able to diffuse only to some extent into the PP particle (Rice and Gold, 1984b). Similar differences between PE and PP have been observed in photo-degradation studies (Shyichuk et al, 2005). Degradation of PE reached all depths proportionally to the exposure time.…”

Section: Polypropylene (Pp) Sorptive Behaviorsupporting

confidence: 84%

Testing phenanthrene distribution properties of virgin plastic pellets and plastic eroded pellets found on Lesvos island beaches (Greece)

Karapanagioti

Klontza

2008

Marine Environmental Research

191

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Plastic pellets have been characterized as toxic pollutant carriers throughout the world oceans and coastal zones. However, their sorptive properties are not yet well understood. In the present study, virgin pellets and plastic eroded pellets (PEP) are used to elucidate their distribution characteristics through distribution kinetic studies. Distribution occurs through diffusion into the pellet for all materials (polyethylene, polyoxymethylene, and PEP) except polypropylene (PP). Although diffusion into the polymer happens with similar rates for both freshwater and saltwater external solutions, apparent diffusion is dependent on the solution salinity because it results in higher equilibrium distribution coefficients. Distribution coefficient into the PEP is higher and diffusion is slower than into the virgin materials. This is attributed to increased crystallinity of the PEP due to weathering. PP demonstrates diffusion rates that are increased by salinity and is apparently faster than into the other polymers suggesting a surface diffusion process.

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Section: Polypropylene (Pp) Sorptive Behaviorsupporting

confidence: 84%

Testing phenanthrene distribution properties of virgin plastic pellets and plastic eroded pellets found on Lesvos island beaches (Greece)

Karapanagioti

Klontza

2008

Marine Environmental Research

191

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“…It has been noted that reaction rates are very effective near material surface, whereas they significantly decrease through the bars due to scarce oxygen concentration (oxygen diffusion limited reaction). The same outcomes have been found elsewhere [25], where comprehensive information on the modifications induced by outdoor aging on coPP/PE are provided.…”

Section: Introductionsupporting

confidence: 69%

The effect of artificial weathering on PP coextruded tape and laminate

Marsich

Ferluga

Cozzarini³

et al. 2017

Composites Part A: Applied Science and Manufacturing

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The aim of this work was to analyse the influence of artificial weathering on polypropylene (PP) selfreinforced\ud composite both as fabric constituent (tape) and as laminate. Particular attention has been\ud focused on the interaction between radiation and material microstructural characteristics, especially\ud for the selective action that the former causes in PP amorphous regions. The evaluation of carbonyl index\ud performed by Fourier Transform Infrared (FT-IR) spectroscopy has highlighted that tapes are more prone\ud to degradation since their drawn structure induces internal stress. Differential scanning calorimetry\ud (DSC) measurements have denoted a shift towards lower temperature of PP melting peak. While crystallinity\ud determination performed by DSC and FT-IR spectroscopy has underlined an increasing trend\ud for laminate over exposure time due to the higher amount of amorphous phase, Raman spectroscopy\ud has revealed that photo-degradation induces a rise of the isomeric defect fraction, limiting chemicrystallisation\ud both for tapes and laminates

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“…This spectral association with increased molecular weight has not been previously observed. [26] This has resulted in the reduction of the molecular weight peak observable within the spectrum of subsurface argon plasma peak intensity compared to that of the subsurface spectrum. In this instance, the addition of a peak around 1.4-2.3 eV for high-molecular-weight PGS-M is considered a marker of a more crystalline state in high-molecular-weight when compared to that of low-molecular-weight PGS-M.…”

Section: Figure 2 A) Offsetmentioning

confidence: 99%

Characterizing Cross‐Linking Within Polymeric Biomaterials in the SEM by Secondary Electron Hyperspectral Imaging

Farr

Pashneh‐Tala

Stehling

et al. 2019

Macromol. Rapid Commun.

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Comparison of UV-degradation depth-profiles in polyethylene, polypropylene and an ethylene–propylene copolymer

Cited by 46 publications

References 29 publications

Testing phenanthrene distribution properties of virgin plastic pellets and plastic eroded pellets found on Lesvos island beaches (Greece)

Testing phenanthrene distribution properties of virgin plastic pellets and plastic eroded pellets found on Lesvos island beaches (Greece)

The effect of artificial weathering on PP coextruded tape and laminate

Characterizing Cross‐Linking Within Polymeric Biomaterials in the SEM by Secondary Electron Hyperspectral Imaging

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