Photo-oxidation of poly(ethylene terephthalate) films intended for photovoltaic backsheet

Fiona J. Horne; John J. Liggat; William A. MacDonald; Stephen W. Sankey

doi:10.1002/app.48623

Photo-oxidation of poly(ethylene terephthalate) films intended for photovoltaic backsheet

Fiona J. Horne, John J. Liggat^*, William A. MacDonald, Stephen W. Sankey

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The photodegradation of 36 μm thick poly(ethylene terephthalate) film under artificial weathering conditions has been investigated. A weatherometer was used to expose samples to a broad wavelength range of light in an oxidative environment, replicating outdoor exposure. Irradiations were also performed using UV lamps of wavelengths 302 and 365 nm light, in an oxidative environment. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, UV–visible spectroscopy, fluorescence spectroscopy, differential scanning calorimetry, contact angle measurements, and scanning electron microscopy. Results show the production of a series of degradation products, including carboxylic acid end groups, anhydrides, aldehydes, quinones, and monohydroxy terephthalate groups.

Original language	English
Article number	48623
Number of pages	18
Journal	Journal of Applied Polymer Science
Volume	137
Issue number	17
Early online date	8 Nov 2019
DOIs	https://doi.org/10.1002/app.48623
Publication status	Published - 5 May 2020

Funding

This work was supported by DuPont Teijin Films and the Strathclyde Centre for Doctoral Training in Advanced Functional and Engineering Polymers.

Keywords

photodegradation
Fourier transform infrared spectroscopy
electron microscopy

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10.1002/app.48623

Horne-etal-JAPS-2019-films-intended-for-photovoltaic-backsheetAccepted author manuscript, 2.14 MB

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title = "Photo-oxidation of poly(ethylene terephthalate) films intended for photovoltaic backsheet",

abstract = "The photodegradation of 36 μm thick poly(ethylene terephthalate) film under artificial weathering conditions has been investigated. A weatherometer was used to expose samples to a broad wavelength range of light in an oxidative environment, replicating outdoor exposure. Irradiations were also performed using UV lamps of wavelengths 302 and 365 nm light, in an oxidative environment. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, UV–visible spectroscopy, fluorescence spectroscopy, differential scanning calorimetry, contact angle measurements, and scanning electron microscopy. Results show the production of a series of degradation products, including carboxylic acid end groups, anhydrides, aldehydes, quinones, and monohydroxy terephthalate groups.",

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AU - Liggat, John J.

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AU - Sankey, Stephen W.

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AB - The photodegradation of 36 μm thick poly(ethylene terephthalate) film under artificial weathering conditions has been investigated. A weatherometer was used to expose samples to a broad wavelength range of light in an oxidative environment, replicating outdoor exposure. Irradiations were also performed using UV lamps of wavelengths 302 and 365 nm light, in an oxidative environment. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, UV–visible spectroscopy, fluorescence spectroscopy, differential scanning calorimetry, contact angle measurements, and scanning electron microscopy. Results show the production of a series of degradation products, including carboxylic acid end groups, anhydrides, aldehydes, quinones, and monohydroxy terephthalate groups.

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Photo-oxidation of poly(ethylene terephthalate) films intended for photovoltaic backsheet

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