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| - For example, nylon, polyethylene, polyesters, polypropylene, polystyrene, ethylene vinyl acetate copolymers, polyurethanes, poly-??-olefins such as polybutadiene and poly ??-octene, and polyamides such as nylon-6 and nylon-6,6, polyureas, polycarbonates, polyethers, polyketones, poly(vinyl chloride), fluoropolymers, and silicone polymers are commonly used polymers in forming useful articles.
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