A polymer having no crystallinity; for example, polysulfone. See Thermoplastics.
Polysulfone (PSU) is an amorphous polymer. Amorphous polymers do not have defined melting points but ranges at which they soften (called the glass transition temperature).
Polysulfone contains the subunit aryl-SO2-aryl (containing the sulfone group). It is known for holding its properties over a wide temperature range. PSU has the highest service temperature of all melt-processable thermoplastics. It has excellent strength and transparency; withstands exposure to water; and can be colored.
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