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what is thermoplastic polymer
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Polypropylene (PP) is a popular plastic used in various industries due to its versatility and economic benefits. However, its naturally hydrophobic surface restricts the bonding with inks, adhesives, and other materials. To enhance its surface energy and improve adhesion, corona treatment is applied. This process involves exposing the PP surface to a high-frequency corona discharge, effectively introducing polar groups onto the surface and increasing its wettability. Through corona treatment, PP's applicability in printing, coating, and laminating processes is significantly enhanced. The key to successful corona treatment lies in proper control of treatment parameters to achieve the desired surface properties without damaging the PP.
Urea is formed from amino acids through a metabolic cycle known as the urea cycle or ornithine cycle, primarily in the liver. This process starts with the breakdown of amino acids, where ammonia, a toxic byproduct, is released. Ammonia is then converted into urea, a less toxic compound, which the body can safely excrete through the kidneys. The conversion involves several enzymatic reactions, first combining ammonia with carbon dioxide to form carbamoyl phosphate, which then enters the urea cycle. Throughout the cycle, ornithine acts as a carrier, facilitating the synthesis of urea. This cycle plays a crucial role in nitrogen excretion, maintaining nitrogen balance, and preventing ammonia toxicity in the body.
The high strength. corrosion resistance. and weldability of grade 6 titanium make it a very good titanium alloy. In addition to aerospace structures. automotive parts. and medical devices. they are commonly used in applications requiring high strength-to-weight ratios. In terms of composition. the alloy contains 5% aluminum. 2.5% tin. small amounts of iron and other elements. It is highly resistant to salt water and high temperature exposure.
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