Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance
A series of aliphatic polybenzimidazoles (PBIs) with methylene groups of varying length were synthesized by the high-temperature polycondensation of 3,3′-diaminobenzidine (DAB) and the corresponding aliphatic dicarboxylic acid in Eaton’s reagent. The influence of the length of the methylene chain on...
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MDPI AG
2023-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/6/1399 |
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| author | Bato Ch. Kholkhoev Zakhar A. Matveev Kseniia N. Bardakova Peter S. Timashev Vitaliy F. Burdukovskii |
| author_facet | Bato Ch. Kholkhoev Zakhar A. Matveev Kseniia N. Bardakova Peter S. Timashev Vitaliy F. Burdukovskii |
| author_sort | Bato Ch. Kholkhoev |
| collection | DOAJ |
| description | A series of aliphatic polybenzimidazoles (PBIs) with methylene groups of varying length were synthesized by the high-temperature polycondensation of 3,3′-diaminobenzidine (DAB) and the corresponding aliphatic dicarboxylic acid in Eaton’s reagent. The influence of the length of the methylene chain on PBIs’ properties was investigated by solution viscometry, thermogravimetric analysis, mechanical testing and dynamic mechanical analysis. All PBIs exhibited high mechanical strength (up to 129.3 ± 7.1 MPa), glass transition temperature (≥200 °C) and thermal decomposition temperature (≥460 °C). Moreover, all of the synthesized aliphatic PBIs possess a shape-memory effect, which is a result of the presence of soft aliphatic segments and rigid <i>bis</i>-benzimidazole groups in the macromolecules, as well as strong intermolecular hydrogen bonds that serve as non-covalent crosslinks. Among the studied polymers, the PBI based on DAB and dodecanedioic acid has high adequate mechanical and thermal properties and demonstrates the highest shape-fixity ratio and shape-recovery ratio of 99.6% and 95.6%, respectively. Because of these properties, aliphatic PBIs have great potential to be used as high-temperature materials for application in different high-tech fields, including the aerospace industry and structural component industries. |
| first_indexed | 2024-03-11T06:00:00Z |
| format | Article |
| id | doaj.art-3a26cf04b0f144fa86a4a0ec6b0ec5ac |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T06:00:00Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-3a26cf04b0f144fa86a4a0ec6b0ec5ac2023-11-17T13:25:00ZengMDPI AGPolymers2073-43602023-03-01156139910.3390/polym15061399Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory PerformanceBato Ch. Kholkhoev0Zakhar A. Matveev1Kseniia N. Bardakova2Peter S. Timashev3Vitaliy F. Burdukovskii4Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, 670047 Ulan-Ude, RussiaBaikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, 670047 Ulan-Ude, RussiaResearch Center “Crystallography and Photonics”, Russian Academy of Sciences, 108840 Moscow, RussiaResearch Center “Crystallography and Photonics”, Russian Academy of Sciences, 108840 Moscow, RussiaBaikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, 670047 Ulan-Ude, RussiaA series of aliphatic polybenzimidazoles (PBIs) with methylene groups of varying length were synthesized by the high-temperature polycondensation of 3,3′-diaminobenzidine (DAB) and the corresponding aliphatic dicarboxylic acid in Eaton’s reagent. The influence of the length of the methylene chain on PBIs’ properties was investigated by solution viscometry, thermogravimetric analysis, mechanical testing and dynamic mechanical analysis. All PBIs exhibited high mechanical strength (up to 129.3 ± 7.1 MPa), glass transition temperature (≥200 °C) and thermal decomposition temperature (≥460 °C). Moreover, all of the synthesized aliphatic PBIs possess a shape-memory effect, which is a result of the presence of soft aliphatic segments and rigid <i>bis</i>-benzimidazole groups in the macromolecules, as well as strong intermolecular hydrogen bonds that serve as non-covalent crosslinks. Among the studied polymers, the PBI based on DAB and dodecanedioic acid has high adequate mechanical and thermal properties and demonstrates the highest shape-fixity ratio and shape-recovery ratio of 99.6% and 95.6%, respectively. Because of these properties, aliphatic PBIs have great potential to be used as high-temperature materials for application in different high-tech fields, including the aerospace industry and structural component industries.https://www.mdpi.com/2073-4360/15/6/1399polybenzimidazoleshigh-temperature shape-memory polymersmechanical propertiesthermally stable polymersphysical crosslinkinghydrogen bonding |
| spellingShingle | Bato Ch. Kholkhoev Zakhar A. Matveev Kseniia N. Bardakova Peter S. Timashev Vitaliy F. Burdukovskii Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance Polymers polybenzimidazoles high-temperature shape-memory polymers mechanical properties thermally stable polymers physical crosslinking hydrogen bonding |
| title | Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance |
| title_full | Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance |
| title_fullStr | Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance |
| title_full_unstemmed | Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance |
| title_short | Aliphatic Polybenzimidazoles: Synthesis, Characterization and High-Temperature Shape-Memory Performance |
| title_sort | aliphatic polybenzimidazoles synthesis characterization and high temperature shape memory performance |
| topic | polybenzimidazoles high-temperature shape-memory polymers mechanical properties thermally stable polymers physical crosslinking hydrogen bonding |
| url | https://www.mdpi.com/2073-4360/15/6/1399 |
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