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However, high-strength permanent threadlockers become potentially removable by heating the assembly, typically to 230 °C (446 °F). Working temperatures for threadlocked fasteners are typically limited to 150 °C (300 °F), which is below the softening point of the methacrylate polymer.
No release agent is required, obviating post-production cleanup. Silicones also exhibit good chemical resistance and high-temperature resistance (205 °C, 400 °F and higher). For this reason, silicone molds are suitable for casting low-melt metals and alloys (e.g. zinc, tin, pewter, and Wood's metal).
Once used for automotive antifreeze, glycerol has the advantage of being non-toxic, withstands relatively high temperatures, and is noncorrosive. It is not however used widely. [ 1 ] Glycerol was historically used as an antifreeze for automotive applications before being replaced by ethylene glycol .
PDMS is viscoelastic, meaning that at long flow times (or high temperatures), it acts like a viscous liquid, similar to honey. However, at short flow times (or low temperatures), it acts like an elastic solid, similar to rubber. Viscoelasticity is a form of nonlinear elasticity that is common amongst noncrystalline polymers. [5]
Industrial cooling water systems are susceptible to scale formation due to high temperatures and concentrations of dissolved minerals. [9] Antiscalants help mitigate scale deposition in cooling towers, heat exchangers, and condensers, preserving their efficiency and reducing the need for maintenance.
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