Polystyrene
PS (Polystyrene, styrene) is a kind of colorless transparent thermoplastic. Have higher glass transition temperature of 100 degrees Celsius, so often be used to make all sorts of need to bear the disposable containers of boiling water temperature, and disposable foam lunch boxes, etc.
Chemical properties
Polystyrene with poor chemical stability can be a variety of organic solvents to dissolve, can be strong acid, alkali corrosion, resistance to grease, easy to change color after by uv irradiation.
Physical properties
Polystyrene hard and fragile texture, structureCondensed Structural Formulas: - / - CH - CH2 - - n
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C6H5
Density: 1050 kg/m&sup 3;
Conductivity: (σ) 10-16 S/m
Thermal conductivity: 0.08
Young modulus: (E) 3000-3600 MPa
Tensile strength: (σt) 46-60 MPa
Elongation length: 3-4%
Charpy impact test: 2-5 kJ/m&sup 2;
Glass transition temperature: 80-100 ° C
Coefficient of thermal expansion : (α) 8 * 10-5 / K
Heat capacity: (c) 1.3 kJ/(kg /K)
Water absorption: (ASTM) 0.03- 0.1
Degradation: + / - 2000years
PS: polystyrene: mainly used in the manufacture of audio and video products and cd-rom disk boxes, lamps and lanterns and interior decoration and the high frequency electrical insulating parts; Train car parts, auto parts, ships with plastic parts, telecommunications, electrical components and construction materials; Manufacturing type hard non-woven dyestuff mixed to produce different colors.
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