| 31. | Toy and replica versions made of polystyrene foam or plastic are also available.
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| 32. | The cheapest modern pillow is domed and made of polystyrene ( styrofoam ).
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| 33. | Whether polystyrene can be microwaved with food is controversial.
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| 34. | Styrene is the precursor to polystyrene and several copolymers.
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| 35. | Polystyrene is often used for 7-inch records.
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| 36. | The larger spheres are expanded polystyrene beads which were compressed and fused together.
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| 37. | Polyethylene and polystyrene figures are made by injection moulding.
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| 38. | This compound is synthesized by the sulfonated polystyrene resin.
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| 39. | If so, those are also polystyrene / styrofoam.
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| 40. | Common examples include polystyrene sulfonate, Nafion and Hycar.
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