Thermotropic polyarylates derived from substituted hydroquinones and p-terphenyl-4,4″-dicarboxylic acid
| Autor: | Toshihide Inoue, T. Yamanaka, N. Tabata |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Terephthalic acid
chemistry.chemical_classification Hydroxybenzoic acid Condensation polymer Polymers and Plastics General Chemical Engineering General Chemistry Biochemistry Thermotropic crystal Crystallinity chemistry.chemical_compound Dicarboxylic acid chemistry Liquid crystal Terphenyl Polymer chemistry Materials Chemistry Environmental Chemistry |
| Zdroj: | Reactive and Functional Polymers. 30:133-140 |
| ISSN: | 1381-5148 |
| DOI: | 10.1016/1381-5148(95)00133-6 |
| Popis: | Polyarylates from substituted hydroquinones (HQs) and p -terphenyl-4,4″-dicarboxylic acid (TPDA) that were modified with 1,2-bis(phenoxy)ethane-4,4′-dicarboxylic acid (PEC), 1,2-bis(2-chlorophenoxy)ethane-4,4′-dicarboxylic acid (ClPEC), terephthalic acid (TA) and p -hydroxybenzoic acid (HBA) were prepared and their thermal and mechanical properties were investigated. These polyarylates exhibited liquid crystallinity at about the same temperatures as polyarylates derived from substituted HQs and 4,4′-diphenyldicarboxylic acid (BB). However, as-spun fibers and injection-molded specimens of these polyarylates exhibited lower moduli than those of substituted HQs and BB that were modified with PEC, Cl-PEC and TA. |
| Databáze: | OpenAIRE |
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