Photo-oxidation of poly(diethylene glycol terephthalate)

Fiona J. Horne; John J. Liggat

doi:10.1002/app.53760

Photo-oxidation of poly(diethylene glycol terephthalate)

Fiona J. Horne, John J. Liggat

Pure And Applied Chemistry

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

Abstract

The photo-oxidation of poly(diethylene glycol terephthalate) (PDEGT) under accelerated ageing conditions has been investigated. A weatherometer was used to expose samples to simulated sunlight under air, replicating outdoor exposure. Irradiations were also performed under air using UV lamps of wavelengths centred on 302 nm and 365 nm. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy and UV-visible spectroscopy. Results show that in general PDEGT degrades to a greater extent than the closely-related polymer poly(ethylene terephthalate) due to the susceptibility of the ether linkage. Although the diethylene glycol sequences are not themselves photoactive over this wavelength range and are not acting as photochemical weak links they do serve as additional sites for secondary free radical chemistry.

Original language	English
Article number	e53760
Number of pages	15
Journal	Journal of Applied Polymer Science
Early online date	24 Feb 2023
DOIs	https://doi.org/10.1002/app.53760
Publication status	E-pub ahead of print - 24 Feb 2023

Keywords

photodegeneration
UV irradiation
weathering
FTIR

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/app.53760Licence: CC BY 4.0

Horne-Liggat-JAPS-2023-Photo-oxidation-of-poly-diethylene-glycolFinal published version, 3.13 MBLicence: CC BY 4.0

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title = "Photo-oxidation of poly(diethylene glycol terephthalate)",

abstract = "The photo-oxidation of poly(diethylene glycol terephthalate) (PDEGT) under accelerated ageing conditions has been investigated. A weatherometer was used to expose samples to simulated sunlight under air, replicating outdoor exposure. Irradiations were also performed under air using UV lamps of wavelengths centred on 302 nm and 365 nm. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy and UV-visible spectroscopy. Results show that in general PDEGT degrades to a greater extent than the closely-related polymer poly(ethylene terephthalate) due to the susceptibility of the ether linkage. Although the diethylene glycol sequences are not themselves photoactive over this wavelength range and are not acting as photochemical weak links they do serve as additional sites for secondary free radical chemistry.",

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author = "Horne, {Fiona J.} and Liggat, {John J.}",

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T1 - Photo-oxidation of poly(diethylene glycol terephthalate)

AU - Horne, Fiona J.

AU - Liggat, John J.

PY - 2023/2/24

Y1 - 2023/2/24

N2 - The photo-oxidation of poly(diethylene glycol terephthalate) (PDEGT) under accelerated ageing conditions has been investigated. A weatherometer was used to expose samples to simulated sunlight under air, replicating outdoor exposure. Irradiations were also performed under air using UV lamps of wavelengths centred on 302 nm and 365 nm. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy and UV-visible spectroscopy. Results show that in general PDEGT degrades to a greater extent than the closely-related polymer poly(ethylene terephthalate) due to the susceptibility of the ether linkage. Although the diethylene glycol sequences are not themselves photoactive over this wavelength range and are not acting as photochemical weak links they do serve as additional sites for secondary free radical chemistry.

AB - The photo-oxidation of poly(diethylene glycol terephthalate) (PDEGT) under accelerated ageing conditions has been investigated. A weatherometer was used to expose samples to simulated sunlight under air, replicating outdoor exposure. Irradiations were also performed under air using UV lamps of wavelengths centred on 302 nm and 365 nm. After exposure, the extent of degradation was determined using attenuated total reflectance Fourier transform infrared spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy and UV-visible spectroscopy. Results show that in general PDEGT degrades to a greater extent than the closely-related polymer poly(ethylene terephthalate) due to the susceptibility of the ether linkage. Although the diethylene glycol sequences are not themselves photoactive over this wavelength range and are not acting as photochemical weak links they do serve as additional sites for secondary free radical chemistry.

KW - photodegeneration

KW - UV irradiation

KW - weathering

KW - FTIR

UR - https://onlinelibrary.wiley.com/journal/10974628

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DO - 10.1002/app.53760

M3 - Article

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

M1 - e53760

ER -

Photo-oxidation of poly(diethylene glycol terephthalate)

Abstract

Keywords

UN SDGs

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