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ABS Resins

CAS No.: 9003-56-9
Formula: (C8H8.C4H6.C3H3N)x
Exact Mass: 211.13600
Molecular Weight: 211.30200
PSA: 23.79000
LogP: 4.38398
Description Feedback
Acrylonitrile butadiene styrene (ABS) (chemical formula (C8H8)x·​(C4H6)y·​(C3H3N)z) is a common thermoplastic polymer. Its glass transition temperature is approximately 105°C (221°F). ABS is amorphous and therefore has no true melting point.
ABS is a terpolymer made by polymerizing styrene and acrylonitrile in the presence of polybutadiene. The proportions can vary from 15 to 35% acrylonitrile, 5 to 30% butadiene and 40 to 60% styrene. The result is a long chain of polybutadiene criss-crossed with shorter chains of poly(styrene-co-acrylonitrile). The nitrile groups from neighboring chains, being polar, attract each other and bind the chains together, making ABS stronger than pure polystyrene. The styrene gives the plastic a shiny, impervious surface. The polybutadiene, a rubbery substance, provides toughness even at low temperatures. For the majority of applications, ABS can be used between −20 and 80°C (−4 and 176°F) as its mechanical properties vary with temperature. The properties are created by rubber toughening, where fine particles of elastomer are distributed throughout the rigid matrix.

Properties Feedback
Appearance & Physical State:white
Density:1.05 g/mL at 25ºC
Melting Point:58.54(±0.5)ºC
Boiling Point:145.2ºC at 760 mmHg

Safety Info Feedback
Safety Statements:S36-S26
Risk Statements:R20/21/22; R36/37/38
Hazard Codes:Xn