Photo-oxidative degradation of bisphenol A polycarbonate and its possible initiation processes

Diepens, M Marjolein; Gijsman, Pieter

doi:10.1016/j.polymdegradstab.2008.03.028

Cited by 43 publications

(29 citation statements)

References 16 publications

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“…The results showed significant UV absorption at wavelengths greater than 250 nm. The spectrum showed a high optical density (OD) in the range of 250-290 nm with λ max at 265 nm, confirming previously published findings (Diepens and Gijsman, 2008). Therefore, two ranges of UV irradiation were used to insure maximum absorption to accelerate the disintegration reactions.…”

Section: Uv-vis Absorbance Spectrumsupporting

confidence: 89%

Optimized photodegradation of Bisphenol A in water using ZnO, TiO2 and SnO2 photocatalysts under UV radiation as a decontamination procedure

Abo

Kummer

Merkel

2016

Drink. Water Eng. Sci.

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Abstract. Experiments on photodegradation of Bisphenol A (BPA) were carried out in water samples by means photocatalytic and photo-oxidation methods in the presence of ZnO, TiO 2 and SnO 2 catalysts. The objective of this study was to develop an improved technique that can be used as a remediation procedure for a BPAcontaminated surface water and groundwater based on the UV solar radiation. The photodegradation of BPA in water performed under a low-intensity UV source mimics the UVC and UVA spectrum of solar radiation between 254 and 365 nm. The archived results reveal higher degradation rates observed in the presence of ZnO than with TiO 2 and SnO 2 catalysts during 20 h of irradiation. The intervention of the advanced photocatalytic oxidation (PCO) reduces the time of degradation to less than 1 h to reach a degradation rate of 90 % for BPA in water. The study proposes the use of ZnO as a competitor catalyst to the traditional TiO 2 , providing the most effective treatment of contaminated water with phenolic products.

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Section: Uv-vis Absorbance Spectrumsupporting

confidence: 89%

Optimized photodegradation of Bisphenol A in water using ZnO, TiO2 and SnO2 photocatalysts under UV radiation as a decontamination procedure

Abo

Kummer

Merkel

2016

Drink. Water Eng. Sci.

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“…As previously reported for unstabilized BPA-PC the absorption below wavelengths of 450 nm increases with increasing irradiation times, see Fig. 4a [5,[13][14][15]. The absorptions at 320 and 355 nm are attributed in the literature to phenylsalicylate and dihydroxybenzophenone respectively [13], which are typical photo-Fries rearrangement products.…”

Section: Photodegradation Of Bpa-pc With Uv-absorbers and Bpa-pc-itr supporting

confidence: 74%

“…The absorptions at 320 and 355 nm are attributed in the literature to phenylsalicylate and dihydroxybenzophenone respectively [13], which are typical photo-Fries rearrangement products. However, we recently showed that the formation of broad bands between 300 and 400 nm is probably due to oxidation products [14,15].…”

Section: Photodegradation Of Bpa-pc With Uv-absorbers and Bpa-pc-itr mentioning

confidence: 99%

Photostabilizing of bisphenol A polycarbonate by using UV-absorbers and self protective block copolymers based on resorcinol polyarylate blocks

Diepens

Gijsman

2009

Polymer Degradation and Stability

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“…In this study, the mechanism of photodegradation is not discussed in detail, as it has been widely studied and can be found in the literature. 23,24 FTIR was employed to investigate the surface elemental compositions of the PCs and AS coatings after UV ageing. Figure 4 shows the FTIR spectra of PC in the 400 cm 21 to 4500 cm 21 region after exposure to UV radiation for different durations.…”

Section: Ftir Characterizationmentioning

confidence: 99%

“…PC degradation is a surface phenomenon that only extends 25 lm into the exposed surface. 23 Thus, using nanoindentation technology to analyze the mechanical changes of PC after UV irradiation is also meaningful.…”

Section: Nanoindetation Characterizationmentioning

confidence: 99%

Adhesion failure of antiscratch coatings on polycarbonate under UV irradiation

Zhang

Zhong

2014

J of Applied Polymer Sci

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The adhesion failure of antiscratch (AS) coatings on unmodified and plasma-modified polycarbonate (PC) substrate was studied using both chemical and physical methods while considering the surface and interface changes between coatings and PC under ultraviolet (UV) irradiation. The differences in the wettability and surface elemental compositions of the PC surface (PCs) and AS coatings after UV ageing were evaluated by contact angle and Fourier transform infrared (FTIR) measurements. The nanoindentation technique was employed for the quantitative assessment of the changes in the nanomechanical properties of both PCs and AS coatings under UV irradiation. The adhesion of coating on plasma-modified PC was found to be significantly better than that of unmodified substrates. The hydrophilicity and polarity of PCs covered by AS coatings were significantly increased because of the photodegradation of PCs, whereas silicon coatings remained invariant. Nanoindentation tests revealed an obvious enhancement in stiffness of the coating and exposed PC after ageing. Based on these experiments, we proposed that adhesion failure under UV irradiation may be caused by two reasons: first, the photodegradation that occurred at the PCs covered by AS coatings; and second, the stress induced by the changes in stiffness of both AS and PCs under UV ageing.

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Photo-oxidative degradation of bisphenol A polycarbonate and its possible initiation processes

Cited by 43 publications

References 16 publications

Optimized photodegradation of Bisphenol A in water using ZnO, TiO<sub>2</sub> and SnO<sub>2</sub> photocatalysts under UV radiation as a decontamination procedure

Optimized photodegradation of Bisphenol A in water using ZnO, TiO<sub>2</sub> and SnO<sub>2</sub> photocatalysts under UV radiation as a decontamination procedure

Photostabilizing of bisphenol A polycarbonate by using UV-absorbers and self protective block copolymers based on resorcinol polyarylate blocks

Adhesion failure of antiscratch coatings on polycarbonate under UV irradiation

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Photo-oxidative degradation of bisphenol A polycarbonate and its possible initiation processes

Cited by 43 publications

References 16 publications

Optimized photodegradation of Bisphenol A in water using ZnO, TiO&lt;sub&gt;2&lt;/sub&gt; and SnO&lt;sub&gt;2&lt;/sub&gt; photocatalysts under UV radiation as a decontamination procedure

Optimized photodegradation of Bisphenol A in water using ZnO, TiO&lt;sub&gt;2&lt;/sub&gt; and SnO&lt;sub&gt;2&lt;/sub&gt; photocatalysts under UV radiation as a decontamination procedure

Photostabilizing of bisphenol A polycarbonate by using UV-absorbers and self protective block copolymers based on resorcinol polyarylate blocks

Adhesion failure of antiscratch coatings on polycarbonate under UV irradiation

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Optimized photodegradation of Bisphenol A in water using ZnO, TiO<sub>2</sub> and SnO<sub>2</sub> photocatalysts under UV radiation as a decontamination procedure

Optimized photodegradation of Bisphenol A in water using ZnO, TiO<sub>2</sub> and SnO<sub>2</sub> photocatalysts under UV radiation as a decontamination procedure