Study of degradation of polystyrene, using infrared spectrophotometry

Achhammer, B. G.; Reiney, M.J.; Reinhart, Frank W.

doi:10.6028/jres.047.016

Cited by 65 publications

(13 citation statements)

References 9 publications

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“…This finding is in agreement with results in the literature. [34,35] Also carbonyl bands (C=O vibration) were detected at 1700 cm À1 in samples HDPE 1000 UV and HDPE 2000 UV (Fig. S1, available as Supplementary material to this paper).…”

Section: Ir Characterisationmentioning

confidence: 99%

Contaminant release from aged microplastic

et al. 2017

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Environmental context. Increasing global plastic production adds plastic debris to the environment. We show that potentially harmful additives present in plastic particles are released to water at an increased rate when material properties change by aging due to exposure to high temperature and especially to UV radiation. For risk assessment of such plastic additives, more information on their degradation products and their toxicity is needed.Abstract. Recycled plastic granules of high-density polyethylene, polyvinyl chloride and polystyrene the size of microplastics were exposed to artificial aging conditions (2000 h; photooxidative and thermo-oxidative) to simulate their fate outdoors. Their potential to leach into water during the aging process was investigated using column percolation tests. Aging-related changes on the surface of the material were characterised by IR measurements indicating oxidation reactions with the formation of new adsorption bands (C=O, C-O and OH), especially in the case of photooxidative aging. These findings were confirmed by the identification of leachable organic compounds. Leaching of total organic carbon, Cl, Ca, Cu and Zn is clearly affected by changes due to aging, and their release is increased after photooxidative aging. In general, exposure to photooxidative conditions shows a greater influence on aging and thus on leaching and seems to be the more important mechanism for the aging of microplastic in the environment. Comparison with the total content of inorganic species revealed that, for most elements, less than 3% of the total content is released after 2000 h of photooxidative aging.

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Section: Ir Characterisationmentioning

confidence: 99%

Contaminant release from aged microplastic

et al. 2017

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“…The fUrns also did not exhibit s,ny discoloration. Previous infrared measurements on films subjected to 100° C for 200 hr [2] did not show any production of carbonyl or hydroxyl absorption bands or any other spectral change.…”

Section: Effect Of Thermal Energy On Transmittancementioning

confidence: 67%

Study of degradation of polystyrene, using ultraviolet spectrophotometry

Reiney¹,

Tryon²,

Achhammer³

1953

J. RES. NATL. BUR. STAN.

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The role of ultraviolet radiant energy and effect of presence of monomer on degradation of polystyrene were st udied by means of ultaviolet absorption techniques. It was found that ~xposure of pure pol,Ystyrene to ultravio~e t .radiant energy resulted in increased absorption III th~ ultravIOlet regIOn of 280 to 400 millimicrons, whICh advanced progressively as exposure t une lllcreased. The presence of monomer increased the rate of d egradation without altering the general type of abso~·p.tion. A post-radiation effe~t was noted in both the pUlified polymer and polymer contallllllg monomer styrene. Agam, t he presence of monomer increased the ra~e of progress of the post-radiation effect. Possible mechanisms are postulated for t he ultravIOlet degradatIOn, and the concept of e ntrapped free radicals is considered as a possible explanation for the post-radiation effect observed.

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“…Thus, the PCB and PS areas were clearly separated out by PCA. From the references [16,17] and FT-IR measurement spectra of PCB, the wavenumber peaks specific to PCB are 1227, 1175, 1289 cm −1 , 1266, 1291 and 1792 cm −1 . In the same manner, the peaks specific to PS are 840, 1152, 1180 cm (Table I), the peaks related to PCB and PS were suggested correspond to wavenumbers related to the PCB and PS structures.…”

Section: E Results and Discussionmentioning

confidence: 99%

Multivariate Analysis Applied to Polymer Imaging Data Obtained by Near-Field Infrared Microscopy

Yamagishi

Honobe

Aoyagi

et al. 2017

e-J. Surf. Sci. Nanotech.

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Chemical imaging techniques such as mass spectrometry (MS) imaging and imaging spectroscopy have grown to be important in a variety of fields. Infrared spectrum information, for example is essential to evaluate organic and biological samples. Recently, near-field spectroscopy techniques have been developed that enable higher spatial resolution above the one usually obtainable due to wavelength limitations. In terms of chemical imaging for organic materials, time-of-flight secondary ion mass spectrometry (TOF-SIMS) is one of the powerful techniques because of extremely high sensitivity and high spatial resolution of approximately 100 nm. Since TOF-SIMS does not always provide complete information on complex samples, a complementary technique of similar spatial resolution is required. Near-field infrared microscope (NFIR) is the most promising candidate for a complementary analysis method along with TOF-SIMS. It is, however, often difficult to interpret NFIR data because of the low signal intensity in near-field infrared. Multivariate analysis techniques such as principal component analysis (PCA), which have successfully been applied to TOF-SIMS imaging data, would also likely be helpful for NFIR data interpretation. In this study, a multicomponent model polymer sample was measured with NFIR and then the image data along with the complex NFIR spectra were analysed by PCA. As a result, the components in the model sample can be separately displayed based on groups of peaks specific to every component indicated by PCA.

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Study of degradation of polystyrene, using infrared spectrophotometry

Cited by 65 publications

References 9 publications

Contaminant release from aged microplastic

Contaminant release from aged microplastic

Study of degradation of polystyrene, using ultraviolet spectrophotometry

Multivariate Analysis Applied to Polymer Imaging Data Obtained by Near-Field Infrared Microscopy

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