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why does uv light degrade polymers
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Globally, the production of Polyvinyl Chloride (PVC) is a significant part of the plastics industry, reflecting its widespread use in construction, healthcare, electronics, automobile, and packaging sectors. As of recent statistics, approximately 40 million metric tons of PVC are manufactured annually. This substantial volume stems from PVC's versatility, durability, and cost-effectiveness, making it a preferred material for various applications. The demand for PVC is expected to grow, driven by its critical role in infrastructure development, particularly in emerging economies, and advancements in PVC recycling technologies aiming to address environmental concerns.
Inkjet printers function by propelling tiny droplets of liquid ink onto paper. The tendency of the ink to ooze through the paper heavily depends on the paper's quality and the ink's composition. High-quality papers designed for inkjet printers typically possess a tighter weave or a specific coating that prevents the ink from seeping through, ensuring clean and crisp printouts. On regular, thin, or uncoated paper, however, ink may bleed through, especially if large amounts of ink are used. Using the correct type of paper and adjusting printer settings for ink usage can significantly reduce or prevent this issue. Overall, while inkjet printers can cause ink to ooze through paper under certain conditions, proper paper selection and printer settings can mitigate this problem.
Silica resin is a highly porous, granular form of silicon dioxide commonly used in chromatography for the separation and purification of biomolecules. It's derived from silica gel, a form of silicon dioxide synthesized from sodium silicate. The unique characteristic of silica resin lies in its ability to be modified on its surface, allowing for the attachment of various functional groups. These modifications enable the selective interaction with different molecules based on size, charge, or hydrophobicity, making it an indispensable tool in biochemical and analytical applications. Its stability across a wide range of pH levels and its high surface area for adsorption make it ideal for precise separations. However, silica resin can be prone to degradation under extreme pH conditions, which limits its use in some scenarios. In research and pharmaceutical industries, silica resin plays a crucial role in purifying DNA, proteins, and other vital substances.
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