Evaluation of poly(ethylene terephthalate) photostabilisation using FTIR spectrometry of evolved carbon dioxide

Fechine, Guilhermino J. M.; Christensen, Paul; Egerton, Terry A.; White, J. R.

doi:10.1016/j.polymdegradstab.2008.10.025

Cited by 24 publications

(19 citation statements)

References 40 publications

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“…However, the durability of products with a longer lifetime, which is assumed to be over 5 years, cannot be confirmed using real lifetime data. The durability of PET films has been evaluated based on thermal degradation [6,7], hydrolytic degradation [8], and chemical reactions induced by laboratory light [9][10][11][12][13][14][15][16]. Testing temperatures of all of these studies are lower than 100 ∘ C. Previously, we evaluated the mechanisms of PET film degradation in detail by using a weathering test machine; we analyzed the molecular structure in the crystalline or amorphous regions by thermal-mechanical methods such as a differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and positron annihilation spectroscopy (PALS) [17].…”

Section: Introductionmentioning

confidence: 99%

Highly Accelerated Aging Method for Poly(ethylene terephthalate) Film Using Xenon Lamp with Heating System

Funabashi

Ninomiya

Oishi

et al. 2016

Journal of Polymers

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PET films were degraded at temperature higher than 100 ∘ C with steam and xenon light by using the newly developed system. Degradation products obtained using the proposed and conventional systems were essentially the same, as indicated by the similar increase in the intensity of the carbonyl peak near 1685 cm −1 in the FT-IR spectra of irradiated specimens and spectrum of original PET film. Elastic moduli derived from the stress-strain (SS) curves obtained in tensile tests were almost the same in the case of the proposed and conventional systems and were independent of the heating temperature, light intensity, and irradiation time. Tensile strength of degraded PET films decreases with increasing heating temperature. Tensile strengths of PET films degraded at same temperature decrease linearly with increasing intensity of xenon light. The lifetime at 90% strength of PET films was calculated. Attempts were made to express this lifetime as functions of the light intensity and the reciprocal of the absolute temperature by using the Eyring model. Estimated lifetime 15.9 h of tensile test using Eyring model for PET film agreed with the lifetime 22.7 h derived from data measured using the xenon weather meter.

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Section: Introductionmentioning

confidence: 99%

Highly Accelerated Aging Method for Poly(ethylene terephthalate) Film Using Xenon Lamp with Heating System

Funabashi

Ninomiya

Oishi

et al. 2016

Journal of Polymers

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“…These changes severely impair the integrity of the polymer film, and their useful lifetimes will tend to decrease under exposure to sunlight . To understand the different phenomena, photo‐degradation of PET has been widely investigated, under ultraviolet (UV) irradiation in standard atmosphere, to reproduce daily utilization . Radiations of low wavelength, the most energetic, are responsible for larger changes observed during exposure to the sun .…”

Section: Introductionmentioning

confidence: 99%

Influence of the environment during a photodegradation of multilayer films

Lewandowski

Rejsek-Riba

Bernès

et al. 2016

J of Applied Polymer Sci

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ABSTRACT:The influence of different stratosphere parameters on the degradation of a multilayer film was investigated. The selected multilayer was a three polymeric layers film, a polyamide 6 film inserted between two poly(ethylene terephthalate) (PET) films. Samples were exposed for several ageing under ultraviolet radiations (filtered at 270 nm), varying the atmosphere at 55 mbar pressure (atm, atm 1 ozone, N 2 , and T 5 255 8C or 123 8C). Evolution of it mechanical properties defined by uniaxial tractions, thermo-optical properties defined by spectrophotometry UV-vis-NIR, chemical properties defined by FTIR-ATR, and thermal and dielectric properties defined, respectively, by differential scanning calorimetry (DSC) and dynamical dielectric spectroscopy (DDS), were investigated. Our results showed that UV irradiation causes multilayer films degradations, that is, principally decrease of UV transmittance and stress and strain at break (250%). An increase of the ageing temperature causes an acceleration of these degradations. Degradations principally occur on the PET side of the multilayer exposed to UV radiation. Moreover, the DDS analysis shows a plasticization effect of the primary mode in the polyamide 6 due to photo-oxidation. Oxygen diffusion is the principal element for this plasticization, indeed it not occurs in a nonoxidative environment (nitrogen), or at low ageing temperature (255 8C).

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“…The structural, optical and surface morphological changes are the most probabilistic effects due to chain scission, cross linking and gaseous emissions [14][15][16][17][18]. Literature includes reports by various authors who have studied the structural, chemical and thermal properties of PET using low and high energetic ions [19][20][21][22]. Jin et al and Li et al reported the modification of the PET surface by implanting the silver ions to reduce the bacterial adhesion for biomedical properties [23,24].…”

Section: Introductionmentioning

confidence: 99%

Investigation of in-depth and surface properties of polyethyleneterephthalate thin films after SHI and gamma radiation treatment by means of PALS and AFM studies

Singh

Kumar

Nambissan

2015

Vacuum

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Evaluation of poly(ethylene terephthalate) photostabilisation using FTIR spectrometry of evolved carbon dioxide

Cited by 24 publications

References 40 publications

Highly Accelerated Aging Method for Poly(ethylene terephthalate) Film Using Xenon Lamp with Heating System

Highly Accelerated Aging Method for Poly(ethylene terephthalate) Film Using Xenon Lamp with Heating System

Influence of the environment during a photodegradation of multilayer films

Investigation of in-depth and surface properties of polyethyleneterephthalate thin films after SHI and gamma radiation treatment by means of PALS and AFM studies

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