Synthesis and Characterization of Novel Aromatic Polyimides from Aromatic Diamine and 3,3'''',4,4''''-p-Quinquephenyltetracarboxylic Dianhydride.

• Morikawa Atsushi

  Department of Materials Science, Faculty of Engineering, Ibaraki University

• Hosoya Yusuke

  Department of Materials Science, Faculty of Engineering, Ibaraki University

Abstract

A new rigid tetracarboxylic dianhydride, 3,3””,4,4””-p-quinquephenyltetracarboxylic dianhydride, was synthesized in seven steps starting from diethyl 4-bromophthalate. New aromatic polyimides containing a p-quinquephenyl unit were synthesized from this tetracarboxylic dianhydride and various aromatic diamines by the conventional two-step procedure of ring-opening polyaddition in a polar amide-type solvent and subsequent thermal cyclic dehydration. These polyimides had inherent viscosities of 0.20–1.20 dL g^-1, and were insoluble in organic solvents. The polyimides were characterized by differential scanning calorimetry (DSC), thermogravimetry (TG), wide-angle X-Ray diffraction measurements, and dynamic mechanical analysis (DMA). Typical polyimides had glass transition temperatures (T_g) at about 250^°C, and crystallized above T_gs. The effects of p-quinquephenyl structure were reflected in the high storage modulus above the glass transition temperature.

Journal

• Polymer Journal

  Polymer Journal 34 (7), 544-549, 2002

  The Society of Polymer Science, Japan

Keywords

• 3,3””,4,4””-<I>p</I>-Quinquephenyltetracarboxylic Dianhydride
• Aromatic Polyimides
• Glass Transition Temperature
• Dynamic Storage Modulus

Details

• CRID: 1390282681266593408
• NII Article ID: 130004430431
• NII Article ID: 10012290126
• NII Book ID: AA00777013
• DOI: 10.1295/polymj.34.544
• COI: 1:CAS:528:DC%2BD38XmtFartrw%3D
• ISSN: 13490540
• ISSN: 00323896
• NDL BIB ID: 6252670
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6252670
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed