Analysis of the thermal behaviour of an alkylated azo compound by differential scanning calorimetry

Kazuma Matsumoto, Akinori Honda, Kuniharu Nomoto, Kazuo Miyamura

Research output: Contribution to journalArticle

Abstract

An alkylated azo compound (SB6) with an n-hexyl group into 1-phenylazonaphthalene-4-ol was newly synthesized, and its thermal behaviour was investigated by differential scanning calorimetry (DSC) and polarized optical microscope (POM) observation. After melting, the SB6 underwent a supercooled state in the cooling process, and showed an exothermic peak of 27 kJ mol–1 at 15°C in the subsequent heating process. Powder X-ray diffraction (XRD) patterns revealed that the exothermic peak was accompanied by the crystallization. These results indicated that SB6 exhibited cold crystallization. In addition, the activation energy of the cold crystallization was confirmed to be 60 kJ mol–1.

Original languageEnglish
Pages (from-to)193-196
Number of pages4
JournalBUNSEKI KAGAKU
Volume69
Issue number4.5
DOIs
Publication statusPublished - 2020

Keywords

  • Azo dye compound
  • Cold crystallization
  • DSC
  • Supercooled state

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