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what is food grade silicone oil
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Step-growth polymers can undergo polyaddition reactions, a subtype of step-growth polymerization where monomers with multiple functional groups react to form polymers without the elimination of small molecules like water or ammonia. Unlike condensation reactions, another subtype of step-growth polymerization that does involve the elimination of small molecules, polyaddition reactions directly add together, creating strong covalent bonds that result in high-molecular-weight polymers over time. This process is applicable to various types of materials, including epoxies, polyurethanes, and certain types of polyesters and polyamides, enabling the creation of a wide range of polymers with diverse properties tailored for specific applications. Understanding the nuances of polyaddition reactions is crucial for chemists and materials scientists designing new materials with desired mechanical, thermal, or chemical properties.
Scrub off yarn is designed specifically for creating durable, textured fabrics, ideal for items that require a bit of abrasiveness for cleaning purposes, such as dishcloths, scrubbers, and other cleaning products. Typically made from polyester or a blend including nylon, scrub off yarn is known for its rough texture and durability, capable of withstanding frequent use and washes without losing its effectiveness. It's favored by crafters for its ability to add an extra cleaning power to handmade items. When using scrub off yarn, it's recommended to test it on a small surface area first to ensure it won't scratch or damage sensitive items.
A titanium alloy's tensile strength ranges from 35.000 to 120.000 psi. while pure titanium's tensile strength is approximately 63.000 psi.
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