Synthesis of 4,4′-isopropylidene diphenol (bisphenol A) based polybenzoxazoles via an acid-catalysed solution cyclization process
| Autor: | James E. McGrath, W. D. Joseph, Régis Mercier, Abaneshwar Prasad, Herve Marand |
|---|---|
| Přispěvatelé: | Matériaux organiques à propriétés spécifiques (LMOPS), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 1993 |
| Předmět: |
Bisphenol A
Condensation polymer Materials science Polymers and Plastics Organic Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences chemistry.chemical_compound Acid catalysis [CHIM.POLY]Chemical Sciences/Polymers Monomer chemistry Polymer chemistry Materials Chemistry Copolymer medicine Organic chemistry Terephthaloyl chloride 0210 nano-technology Glass transition medicine.drug |
| Zdroj: | Polymer Polymer, Elsevier, 1993, 34 (4), pp.866-869. ⟨10.1016/0032-3861(93)90375-K⟩ |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/0032-3861(93)90375-k |
| Popis: | International audience; Polybenzoxazoles were successfully prepared from bisaminophenols based upon 4,4′-isopropylidene diphenol (bisphenol A) and terephthaloyl chloride and optionally isophthaloyl chloride monomers. The successful ‘one-pot' process involves a low-temperature polycondensation followed by an acid-catalysed solution cyclization reaction. The fully cyclized copolymers were isotropic in nature, displayed glass transition temperatures as high as 300°C, and formed tough films when prepared from m-cresol. Semicrystallinity could be developed in the 100% terephthaloyl chloride polybenzoxazole (PBO) system when annealed 40°C above its Tg. Characterization of the fully cyclized materials was demonstrated via the aid of spectroscopic and solution characterization techniques. The process is also amenable to higher-performance PBO systems |
| Databáze: | OpenAIRE |
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