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It is an inexpensive resin per unit weight. It is a poor barrier to air and water vapor and has a relatively low melting point. [6] Polystyrene is one of the most widely used plastics, with the scale of its production being several million tonnes per year. [7] Polystyrene is naturally transparent, but can be colored
Melting point: −30 °C (−22 °F; 243 K) ... Styrene is the precursor to polystyrene and ... As the difference in boiling points between the two compounds is only ...
Polystyrene is composed only of styrene-based repeat units, ... result in the high tensile strength and melting point of polymers containing urethane or urea linkages.
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
Styrene maleic anhydride (SMA or SMAnh) is a synthetic polymer that is built-up of styrene and maleic anhydride monomers.In one copolymer, the monomers can be almost perfectly alternating.
Syndiotactic polystyrene, made by metallocene catalysis polymerization, is crystalline with aa melting point of 161 °C. Gutta percha is also an example syndiotactic polymer. [ 9 ]
Styrofoam insulation extruded polystyrene foam (XPS), owned and manufactured by DuPont. Styrofoam is a genericized trademarked brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and as a water barrier.
It is widely used in place of polystyrene owing to its greater thermal resistance. The chains of between 70 and 80% by weight styrene and 20 to 30% acrylonitrile. [ 1 ] Larger acrylonitrile content improves mechanical properties and chemical resistance, but also adds a yellow tint to the normally transparent plastic.