Amorphous Polymers

Amorphous polymers are polymers in which the molecular chains are arranged in a random, disordered structure. The random structure creates polymers that do not have a distinct melting temperature (Tm). Instead, amorphous polymers soften over a temperature range defined by the polymer’s glass transition temperature (Tg). The disordered molecular structure generally results in reduced shrinkage and warpage during cooling compared to crystalline polymers. Amorphous polymers are often transparent and provide consistent dimensional stability.

Many commercial plastics are semi-crystalline, containing both ordered (crystalline) and disordered (amorphous) regions.

Amorphous polymers tend to have lower chemical and heat resistance than crystalline polymers but offer more consistent looks and performance.

M. Holland helps customers select the right material type for performance, appearance and manufacturability. By working closely with suppliers and customers, M. Holland provides guidance on how polymer structure influences end-use performance and processing outcomes.