Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy
Neutral polymer bonding agent (NPBA) is one of the most promising polymeric materials, widely used in nitrate ester plasticized polyether (NEPE) propellant as bonding agent. The structure and dynamics of NPBA under different conditions of temperatures and sample processing are comprehensively invest...
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| Format: | Article |
| Language: | en_US |
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MDPI AG
2014
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| Online Access: | http://hdl.handle.net/1721.1/88082 |
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| author | Su, Yongchao Pang, Aimin Cai, Rulin Ma, Xingang Li, Shenhui Hu, Wei, 1972- Zhou, Lei,Ph.D.Massachusetts Institute of Technology. |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Su, Yongchao Pang, Aimin Cai, Rulin Ma, Xingang Li, Shenhui Hu, Wei, 1972- Zhou, Lei,Ph.D.Massachusetts Institute of Technology. |
| author_sort | Su, Yongchao |
| collection | MIT |
| description | Neutral polymer bonding agent (NPBA) is one of the most promising polymeric materials, widely used in nitrate ester plasticized polyether (NEPE) propellant as bonding agent. The structure and dynamics of NPBA under different conditions of temperatures and sample processing are comprehensively investigated by solid state NMR (SSNMR). The results indicate that both the main chain and side chain of NPBA are quite rigid below its glass transition temperature (Tg). In contrast, above the Tg, the main chain remains relatively immobilized, while the side chains become highly flexible, which presumably weakens the interaction between bonding agent and the binder or oxidant fillers and in turn destabilizes the high modulus layer formed around the oxidant fillers. In addition, no obvious variation is found for the microstructure of NPBA upon aging treatment or soaking with acetone. These experimental results provide useful insights for understanding the structural properties of NPBA and its interaction with other constituents of solid composite propellants under different processing and working conditions. |
| first_indexed | 2024-09-23T10:22:47Z |
| format | Article |
| id | mit-1721.1/88082 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:22:47Z |
| publishDate | 2014 |
| publisher | MDPI AG |
| record_format | dspace |
| spelling | mit-1721.1/880822022-09-26T17:30:20Z Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy Su, Yongchao Pang, Aimin Cai, Rulin Ma, Xingang Li, Shenhui Hu, Wei, 1972- Zhou, Lei,Ph.D.Massachusetts Institute of Technology. Massachusetts Institute of Technology. Department of Chemistry Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Su, Yongchao Neutral polymer bonding agent (NPBA) is one of the most promising polymeric materials, widely used in nitrate ester plasticized polyether (NEPE) propellant as bonding agent. The structure and dynamics of NPBA under different conditions of temperatures and sample processing are comprehensively investigated by solid state NMR (SSNMR). The results indicate that both the main chain and side chain of NPBA are quite rigid below its glass transition temperature (Tg). In contrast, above the Tg, the main chain remains relatively immobilized, while the side chains become highly flexible, which presumably weakens the interaction between bonding agent and the binder or oxidant fillers and in turn destabilizes the high modulus layer formed around the oxidant fillers. In addition, no obvious variation is found for the microstructure of NPBA upon aging treatment or soaking with acetone. These experimental results provide useful insights for understanding the structural properties of NPBA and its interaction with other constituents of solid composite propellants under different processing and working conditions. National Natural Science Foundation (China) (21120102038) National Natural Science Foundation (China) (21373265) National Natural Science Foundation (China) (21003154) 2014-06-23T20:47:44Z 2014-06-23T20:47:44Z 2014-01 2014-01 Article http://purl.org/eprint/type/JournalArticle 1420-3049 http://hdl.handle.net/1721.1/88082 Hu, Wei, Yongchao Su, Lei Zhou, Aimin Pang, Rulin Cai, Xingang Ma, and Shenhui Li. “Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy.” Molecules 19, no. 1 (January 22, 2014): 1353–1366. en_US http://dx.doi.org/10.3390/molecules19011353 Molecules Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf MDPI AG MDPI Publishing |
| spellingShingle | Su, Yongchao Pang, Aimin Cai, Rulin Ma, Xingang Li, Shenhui Hu, Wei, 1972- Zhou, Lei,Ph.D.Massachusetts Institute of Technology. Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy |
| title | Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy |
| title_full | Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy |
| title_fullStr | Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy |
| title_full_unstemmed | Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy |
| title_short | Molecular Dynamics of Neutral Polymer Bonding Agent (NPBA) as Revealed by Solid-State NMR Spectroscopy |
| title_sort | molecular dynamics of neutral polymer bonding agent npba as revealed by solid state nmr spectroscopy |
| url | http://hdl.handle.net/1721.1/88082 |
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