Investigating thermal properties of and melting-induced structural changes in cold-drawn P(3HB) films with α- And β-structures using real-time X-ray measurements and high-speed DSC

Taizo Kabe, Toshihisa Tanaka, Hironori Marubayashi, Takaaki Hikima, Masaki Takata, Tadahisa Iwata

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In this study, we prepared two types of drawn films of poly[(R)-3-hydroxybutyrate], a microbial polyester: those containing only α-crystals and those containing both α- and β-crystals. Real-time wide-angle X-ray diffraction (WAXD) and real-time small-angle X-ray scattering (SAXS) measurements were performed during heating using synchrotron X-rays, along with high-speed differential scanning calorimetry (DSC), to measure the melting temperature of the β-crystals, which were present in a small amount. The changes induced in the highly ordered structure of the films were also observed. Based on the results of the real-time WAXD measurements, the melting temperature of the β-crystals was found to vary from 90 °C to 130 °C. The results of high-speed DSC supported these results. The real-time SAXS measurements allowed the changes in the highly order structure of the films to be observed. A model to explain the changes in the highly order structure is constructed based on the obtained results.

Original languageEnglish
Pages (from-to)181-188
Number of pages8
JournalPolymer
Volume93
DOIs
Publication statusPublished - 2016 Jun 14
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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