TY - JOUR
T1 - 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
AU - Kabe, Taizo
AU - Tanaka, Toshihisa
AU - Marubayashi, Hironori
AU - Hikima, Takaaki
AU - Takata, Masaki
AU - Iwata, Tadahisa
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research (A) of JSPS (No. 26248044 (2014) (T.I.)); a Grant-in-Aid for Challenging Exploratory Research of JSPS (No. 25620168 (2013) (T.I.)); and the CREST program of the Japan Science and Technology Agency (JST) . The synchrotron radiation experiments were performed at the BL45XU of SPring-8 with the approval of RIKEN (Proposal No. 20140030, 20150080).
Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.
PY - 2016/6/14
Y1 - 2016/6/14
N2 - 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.
AB - 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.
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U2 - 10.1016/j.polymer.2016.04.028
DO - 10.1016/j.polymer.2016.04.028
M3 - Article
AN - SCOPUS:84964659740
VL - 93
SP - 181
EP - 188
JO - Polymer (United Kingdom)
JF - Polymer (United Kingdom)
SN - 0032-3861
ER -