期刊
MACROMOLECULES
卷 50, 期 10, 页码 3884-3890出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.7b00598
关键词
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资金
- MEXT Strategic Project to Support the Formation of Research Bases at Private Universities
- Japan Society for the Promotion of Science [24560033]
- Grants-in-Aid for Scientific Research [24560033] Funding Source: KAKEN
Poly(butylene, adipate) (PBA) exhibits the two types of crystal modification, the alpha and beta forms, depending, on the sample preparation conditions. They show the different degree of biodegradability. A majority of papers published so far reported that the phase transition from the beta-form to the alpha-form occurs as the direct solid-to-solid process when the sample is heated up to the'high temperature of around 55 degrees C. We have reinvestigated this beta-to-alpha phase transition by performing the temperature-jump time-resolved measurement of the FTIR, WAXD, and SAXS measurements. This transition has been found to be not a solid-to-solid phase transition but the combined phenomena of the melting of the beta-phase followed by the recrystallization to the high-temperature alpha-phase.
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