supercooled polymer melt

https://doi.org/10.1351/goldbook.12805
Metastable melt of a crystallisable polymer at temperatures below its equilibrium melting temperature.
Source:
PAC, 2013, 85, 1017. (Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)) on page 1039 [Terms] [Paper]