Synthesis and Properties of Novel Polyarylates and Poly(ether ether ketone)s Derived from 2,7-Triptycenediol
| Autor: | Mari Inoki, Yoshio Kasashima, Masayuki Kondo, Kazuhiro Kayaki, Tomokazu Inagawa, Fumihiko Akutsu |
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| Rok vydání: | 1997 |
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| Zdroj: | Polymer Journal. 29:1023-1028 |
| ISSN: | 1349-0540 0032-3896 |
| DOI: | 10.1295/polymj.29.1023 |
| Popis: | Novel polyarylates are obtained by interfacial polycondensations of 9,10-dihydro-9,10-o-benzenoanthracene-1,5-diol (2,7-triptycenediol; TRIDO) with aromatic diacyl chlorides using benzyltriethylammonium chloride as a phase transfer catalyst. Inherent viscosity ranged from 0.29 to 0.51 dl g−1. The glass transition temperatures (Tgs) were 243–249°C, and temperatures at 5% weight loss (Tds) were above 488°C. These polyarylates were amorphous. The polyarylate derived from TRIDO and isophthaloyl dichloride showed good solubility in several organic solvents. Novel poly(ether ether ketone)s are prepared by nucleophilic displacement reaction of TRIDO with activated aromatic difluorides, such as 4,4′-difluorobenzophenone (DFBP) and 1,4-bis(4-fluorobenzoyl)benzene (BFBB), using potassium carbonate and toluene. Inherent viscosity ranged between 0.30–0.47 dl g−1. Tgs were about 230°C, and Tds from 544 to 568°C. The poly(ether ether ketone) derived from TRIDO and DFBP (2c) possessed high solubility, and that from TRIDO and BFBB (2d) had poor solubility. X-Ray diffraction patterns suggested that 2c was amorphous and 2d was semi-crystalline. 2d melting point was 301°C. A characteristic semi-crystalline nature was found only in poly(ether ether ketone) 2d even though aromatic polyamides, polyimides, and polyarylates containing 2,7-triptycenediyl structure were all amorphous. |
| Databáze: | OpenAIRE |
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