Graft copolymers of rigid-rod polymers as single-component molecular composites
| Autor: | Robert C. Evers, My Dotrong, M. H. Dotrong |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
chemistry.chemical_classification
Materials science Ketone Polymers and Plastics Organic Chemistry Ether Chloride chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry medicine Copolymer Moiety Organic chemistry Terephthaloyl chloride Phosphorus pentoxide Stoichiometry medicine.drug |
| Zdroj: | Polymer. 34:726-730 |
| ISSN: | 0032-3861 |
| Popis: | End-capped poly(p-phenylenebenzobisthiazole) structures containing randomly distributed 2,6-dimethylphenoxy pendants along the rigid-rod backbone were synthesized through the copolycondensation of 2,5-diamino-1,4-benzenedithiol dihydrochloride with terephthaloyl chloride and 2-(2,6-dimethylphenoxy)-terephthaloyl chloride in polyphosphoric acid. End-capping was accomplished through the addition of 2,4,6-trimethylbenzoic acid to the reaction mixture. Through control of reaction stoichiometry, copolymer intrinsic viscosities were limited to 8.6 dl g−1 (methanesulphonic acid, 30°C) or less. The 2,6-dimethylphenoxy moiety served as a graft site for grafting reactions with 3-phenoxybenzoic acid in a methanesulphonic acid/phosphorus pentoxide medium. Incorporation of the resultant thermoplastic poly(ether ketone) side-chains into the rigid-rod poly(p-phenylenebenzobisthiazole) structures was substantiated through infra-red spectroscopy and analysis of model reactions. |
| Databáze: | OpenAIRE |
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