stackyFACTS
Polyacrylonitrile fibers are heated without oxygen so they don’t burn; the treatment removes non-carbon atoms, leaving strong carbon-rich fibers.
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Carbon-fiber strands look like black yarn before they’re wrapped in resin and cured under heat and pressure, forming a rigid composite.
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Sunlight activates the titanium dioxide coating, which breaks down organic grime; rain then sheets across the glass and carries the dirt away.
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Water moves into the hydrogels through osmosis, and chemical cross-links keep the polymer network from dissolving. The material swells into a gel that can…
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Unlike natural rubber, neoprene resists damage from oils and greases while staying flexible across a range of temperatures.
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Expanded polystyrene is about 98% gas by volume: blowing agents expand the beads, leaving air trapped in a rigid plastic matrix. Those bubbles make it…
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Stephanie Kwolek was investigating lightweight fibers for tire reinforcement when her work led to Kevlar. Its high tensile strength relative to its weight…
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