Thermal Stability of High Molecular Weight Self-Doped Poly(anilineboronic acid)
| Autor: | Bhavana A. Deore, T. Christopher Corkery, Michael S. Freund, Carmen L. Recksiedler, Insun Yu, † and Alaa S. Abd-El-Aziz |
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| Rok vydání: | 2005 |
| Předmět: |
inorganic chemicals
Conductive polymer Thermogravimetric analysis Polymers and Plastics Organic Chemistry Dispersity Inorganic Chemistry Gel permeation chromatography chemistry.chemical_compound chemistry Polyaniline Polymer chemistry Materials Chemistry Molar mass distribution Thermal stability Boronic acid |
| Zdroj: | Macromolecules. 38:10022-10026 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma0513158 |
| Popis: | The molecular weight, thermal stability, and conductivity of chemically synthesized, self-doped poly(anilineboronic acid) have been determined. Gel permeation chromatography results indicate a number-average molecular weight of 1 676 000 g mol-1, a weight-average molecular weight of 1 760 000 g mol-1, and a polydispersity of ∼1.05. The high molecular weight is maintained following removal of boronic acid groups via ipso-substitution reactions, suggesting that boronic ester cross-links do not contribute significantly to the high molecular weight observed. According to thermogravimetric analysis results, the thermal stability of self-doped poly(anilineboronic acid) is greater than that of HCl-doped polyaniline and other self-doped forms of polyaniline. Unlike polyaniline, which experiences complete decomposition of the backbone above 400 °C, self-doped poly(anilineboronic acid) remains largely intact and possesses conductivity near 0.01 S cm-1. |
| Databáze: | OpenAIRE |
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