Amorphous thermoplastics acrylonitrile-butadiene-styrene

Abbreviation for acrylonitrile-butadiene-styrene, an amorphous thermoplastic. 

Acrylonitrile butadiene styrene (ABS) is an amorphous thermoplastic terpolymer. It has been molded in the past commercially and has been the subject of several major research projects at university level. Studies have shown that ABS (along with polystyrene and acrylic) is a material that is sensitive to degradation and one that can sinter to produce a porous and friable structure with low tensile strength and high surface porosity. Increased rubber content in ABS leads to increased difficulty in densification. 

Polyetherimide (PEI) is an amorphous engineering thermoplastic. Thermoplastic PEIs provide the strength, heat resistance, and flame retardancy of traditional polyimides (Pis) with the ease of simple melt processing seen in standard injection-molding resins such as polycarbonate and acrylonitrile-butadiene-styrene (ABS). 

Acrylonitrile-butadiene-styrene (ABS), an amorphous pol5nner, has been in mass production since the 1960s. It is a st5Tenic copolymer blend made out of elastomeric components and an amorphous thermoplastic component. The elastomeric component is usually polybutadiene or a butadiene copolymer. The thermoplastic component is SAN, a copolymer of styrene and acrylonitrile. SAN... 

The strength of amorphous styrenics - polystyrene and acrylonitrile butadiene styrene - is reduced by mineral addition. Calcium carbonate and talcs, especially siuface treated grades, are used, nevertheless, to increase the impact resistance of polystyrene modified with thermoplastic elastomer. The more crystalline styrenics - styrene acrylonitrile and styrene maleic anhydride - respond to reinforcement with glass fibers, mica or wollastonite. Table 12 compares the effects of various minerals in styrenics. 

Some typical examples of amorphous thermoplastics are acrylonitrile-butadiene-styrene (ABS), polymethylmethacrylate (PMMA), polystyrene (PS) and polycarbonate (PC). Applications for amorphous thermoplastics vary from car bumpers to Lego bricks, and from motorcycle helmets to ski boots. 

On amorphous thermoplastics, however, such as acrylonitrile butadiene styrene (ABS) and polycarbonate, standard ethyl cyanoacrylates showed excellent bond-strength... 

Materials such as polystyrene (PS), polycarbonate (PC), acrylics (PMMA), acrylonitrile-butadiene-styrene (ABS) and polyvinyl chloride (PVC) are said to be amorphous thermoplastics. This signifies that in the solid state their molecular structure is random and disordered, the long chain molecules being all entangled rather like solidified spaghetti. 

By definition, thermoplastics have limitations at elevated temperatures. It is in this particular property that fibrous glass can lead to remarkable improvements. However, a sharp division exists for reinforced thermoplastics. The various reinforced thermoplastics can be put in two groups relative to DTUL. These consist of amorphous and crystalline or semicrystalline polymers. The amorphous polymers such as styrene-acrylonitrile, polystyrene, polycarbonate, poly (vinyl chloride), and acrylo-nitrile-butadiene-styrene are generally limited to modest DTUL improvements, usually on the order of 20°F with 20% glass. However, crystalline polymers such as the nylons, linear polyethylene, polypropyl-... 

ABS is a generic name for a family of amorphous thermoplastics produced by combining three monomers acrylonitrile, butadiene and styrene. Different ratios of these monomers provide variations in strength, stiffness, impact resistance and surface appearance and so there are many different versions of ABS, each with their own particular properties. 

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