• Ming Li

This work describes the melting and polymorphic behavior of poly(decamethylene terephthalamide) (PA 10T). Both solution-crystallized (SC) and melt-crystallized (MC) PA 10T show double melting endotherms in DSC. The SC crystal form melts at 260–300°C giving the first melting endotherm, and meanwhile undergoes a polymorphic transition forming the MC crystal form. The subsequent melting of the MC crystal form gives the second melting endotherm at 300–325°C. This irreversible polymorphic transition is confirmed by variable-temperature WAXD and IR. Dynamic mechanical thermal analysis (DMTA) shows a glass transition temperature (T g ) at 127°C and the presence of an α′ transition at 203°C (0.1 and 1 Hz). This transition could be confirmed by DSC and variable-temperature WAXD experiments. The α′ transition correlates with a reversible thermal process and a sudden change in intersheet spacing.

Original languageEnglish
Pages (from-to)465-472
Number of pages8
JournalJournal of Polymer Science, Part B: Polymer Physics
Issue number8
Publication statusPublished - 15 Apr 2019

    Research areas

  • crystallization, double melting endotherms, DSC, PA 10T, polymorphic transition, polymorphism

ID: 51913818