Workers engaged in the PVC-production, who were long-term exposed to the gaseous base vinyl chloride exhibit a complex pattern of damages. Changes of the skin, vascular and bone system, as well as thrombocytopenia, liver fibrosis with portal hypertension, disturbances of the porphyrin metabolism and alterations of the central nervous system were observed. Moreover vinyl chloride is oncogenic and may cause angiosarcoma of the liver. By directed occupational medicine supervision, improvement of the production conditions and introduction of new processing techniques health risks at the workplace could be eliminated to a far extend.
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Anal Chem
January 2025
Department of Chemistry, University of Waterloo, 200 University Avenue W., Waterloo, Ontario N2L 3G1, Canada.
Research has shown microplastic particles to be pervasive pollutants in the natural environment, but labor-intensive sample preparation, data acquisition, and analysis protocols continue to be necessary to navigate their diverse chemistry. Machine learning (ML) classification models have shown promise for identifying microplastics from their Raman spectra, but all attempts to date have focused on the lower energy "fingerprint" region of the spectrum. We explore strategies to improve ML classification models based on the -nearest-neighbor algorithm by including other regions of the Raman spectra.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
The potential of advanced energy storage devices lies in using solid biodegradable polymer electrolytes. This study is focused on a solid blend polymer electrolyte (SBPE) film based on chitosan (CS)-poly(vinyl alcohol) (PVA) blend matrix doped with magnesium chloride (MgCl) salt via solution casting. The interaction of MgCl was verified via X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy.
View Article and Find Full Text PDFThe objective of the study was to examine the mechanical and electrostatic properties of poly(vinyl chloride) intended for use in protective footwear. The poly(vinyl chloride) material was made with graphite (flake side dimensions 5 and 10 µm) additive in weight concentration variants from 0.5 to 10.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
Poly(vinyl chloride) (PVC) and polystyrene (PS) are among the least recycled plastics. In this work, we developed a simple and novel strategy to valorize PVC and PS plastics via photothermal conversion to (1-chloroethyl)benzene, a commodity chemical with excellent versatility. As PVC is known to release HCl gas and decompose into conjugated polyenes, we envisioned a dual role for PVC plastics.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Faculty of Civil and Transport Engineering, Institute of Machines and Motor Vehicles, Poznan University of Technology, 60-965 Poznan, Poland.
In the study of structural materials, the analysis of fracture and deformation resistance plays an important role, particularly in materials widely used in the construction industry, such as poly(vinyl chloride) (PVC). PVC is a popular material used, among others, in the manufacture of window profiles, doors, pipes, and many other structural components. The aim of this research was to define the influence of the degree of milling of the glass-fibre-reinforced composite on the strength of the window frame welds, and in the next step, to propose new welding parameters to obtain sufficient strength properties that allow reducing the cost of the technological welding operation.
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