Styrene Acrylonitrile (SAN) Plastic
Styrene Acrylonitrile (SAN) - Styrene and acrylonitrile monomers can be copolymerized to form a random, amorphous copolymer that has improved weatherability, stress crack resistance, and barrier properties. The copolymer is called styrene acrylonitrile or SAN. The SAN copolymer generally contains 70 to 80% styrene and 20 to 30% acrylonitrile. This combination provides higher strength, rigidity, and chemical resistance than polystyrene, but it is not quite as clear as crystal polystyrene and its appearance tends to yellow more quickly.
Styrene acrylonitrile (SAN) copolymers have been available since the 1940s. Initially the price of styrene acrylonitrile materials was too high for it to be used in more than a few specialized applications.
Chemical Resistant (40), High Clarity (28), High Flow (27), General Purpose (22), High Heat Resistance (21), Good Dimensional Stability (20), Food Contact Acceptable (18), High Strength (16), Good Flow (16), Copolymer (12), 40 More...
Electrical/Electronic Applications (20), Household Goods (16), Cosmetic Packaging (14), Appliances (11), Compounding (11), Automotive Applications (11), General Purpose (7), Cups (6), Stationary Supplies (6), White Goods & Small Appliances (6), 53 More...
- Higher water absorption than polystyrene
- Low thermal capability
- Low impact strength
- Yellows more quickly than PS
- Higher processing temperatures
- Flammable with high smoke generation
Typical Properties and Processing Information
View material property information for Styrene Acrylonitrile (SAN) plastics.
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