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  • 1 Tokyo Institute of Technology Chemical Resources Laboratory Kanagawa Japan 226-8503 4259 Nagatsuta-cho, Midori-ku, Yokohama Kanagawa Japan 226-8503 4259 Nagatsuta-cho, Midori-ku, Yokohama
  • | 2 Tokyo Metropolitan University Graduate School of Engineering Tokyo Japan 192-0397 1-1 Minamiosawa, Hachioji Tokyo Japan 192-0397 1-1 Minamiosawa, Hachioji
  • | 3 Tokyo Metropolitan University Faculty of Urban Environment Science Tokyo Japan 192-0397 1-1 Minamiosawa, Hachioji Tokyo Japan 192-0397 1-1 Minamiosawa, Hachioji
  • | 4 JST-CREST Saitama Japan 332-0012 4-1-8 Honmachi, Kawaguchi Saitama Japan 332-0012 4-1-8 Honmachi, Kawaguchi
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Abstract  

Phase transition process of PEOm-b-PMA(Az)n was investigated by the simultaneous DSC-XRD measurement using the synchrotron radiation facility. Four endothermic DSC peaks were observed during heating process. These DSC peaks were assigned to the melting of PEO, the transition from SmX, which is a mixture of super-cooled SmC and crystal, to SmC, from SmC to SmA, and from SmA to isotropic liquid state as determined by XRD profiles. In SmC phase, the liner expansion coefficient calculated from the spacing variation of the smectic layer distance was larger than that of the other phases. This result reflected the fact azobenzene moieties in the long-side chains of PMA(Az)n forming the smectic layers and then they were tilted and stood up during the heating process.

Manuscript Submission: HERE

  • Impact Factor (2019): 2.731
  • Scimago Journal Rank (2019): 0.415
  • SJR Hirsch-Index (2019): 87
  • SJR Quartile Score (2019): Q3 Condensed Matter Physics
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • Impact Factor (2018): 2.471
  • Scimago Journal Rank (2018): 0.634
  • SJR Hirsch-Index (2018): 78
  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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