Preparation and characterization of branched energetic polymers
The energetic binders are important constituents of energetic material composites such as propellants. The most widely used energetic binders such as GAP are the polyurethane based, produced by curing reaction of the energetic prepolymers with isocyanates. Energetic plasticizers are key ingredients...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2021
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| Online Access: | https://hdl.handle.net/10356/147463 |
| _version_ | 1826120159455084544 |
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| author | Wang, Zhongkang |
| author2 | Hng Huey Hoon |
| author_facet | Hng Huey Hoon Wang, Zhongkang |
| author_sort | Wang, Zhongkang |
| collection | NTU |
| description | The energetic binders are important constituents of energetic material composites such as propellants. The most widely used energetic binders such as GAP are the polyurethane based, produced by curing reaction of the energetic prepolymers with isocyanates. Energetic plasticizers are key ingredients which help to improve the processability and flexibility of the energetic binders.
The effects of plasticizers on energetic binders are required to be investigated to develop the further applications of plasticized binders. This research aims to investigate the efficiency of GAPA and BuNENA plasticizers to lower the viscosity and glass transition temperature and improve the flexibility of GAP based energetic binder systems with different degree of branching. The viscosities, glass transition temperature and storage modulus of binder/plasticizer mixtures were measured as a function of plasticizer loading. The activation energy for flow and plasticizer efficiencies were calculated respectively for the two plasticizers.
The results indicate that the BuNENA plasticizer provides a lower activation energy to flow of the energetic binders as compared to GAPA. The BuNENA plasticizer had a higher plasticizing efficiency in lowering the glass transition temperature of the binders. The BuNENA plasticizer could improve the flexibility and provide the larger elastic region for the cured binders. |
| first_indexed | 2024-10-01T05:11:56Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/147463 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:11:56Z |
| publishDate | 2021 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1474632023-03-04T15:41:39Z Preparation and characterization of branched energetic polymers Wang, Zhongkang Hng Huey Hoon School of Materials Science and Engineering ASHHHng@ntu.edu.sg Engineering::Materials::Energy materials The energetic binders are important constituents of energetic material composites such as propellants. The most widely used energetic binders such as GAP are the polyurethane based, produced by curing reaction of the energetic prepolymers with isocyanates. Energetic plasticizers are key ingredients which help to improve the processability and flexibility of the energetic binders. The effects of plasticizers on energetic binders are required to be investigated to develop the further applications of plasticized binders. This research aims to investigate the efficiency of GAPA and BuNENA plasticizers to lower the viscosity and glass transition temperature and improve the flexibility of GAP based energetic binder systems with different degree of branching. The viscosities, glass transition temperature and storage modulus of binder/plasticizer mixtures were measured as a function of plasticizer loading. The activation energy for flow and plasticizer efficiencies were calculated respectively for the two plasticizers. The results indicate that the BuNENA plasticizer provides a lower activation energy to flow of the energetic binders as compared to GAPA. The BuNENA plasticizer had a higher plasticizing efficiency in lowering the glass transition temperature of the binders. The BuNENA plasticizer could improve the flexibility and provide the larger elastic region for the cured binders. Bachelor of Engineering (Materials Engineering) 2021-04-03T10:49:52Z 2021-04-03T10:49:52Z 2021 Final Year Project (FYP) Wang, Z. (2021). Preparation and characterization of branched energetic polymers. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/147463 https://hdl.handle.net/10356/147463 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials::Energy materials Wang, Zhongkang Preparation and characterization of branched energetic polymers |
| title | Preparation and characterization of branched energetic polymers |
| title_full | Preparation and characterization of branched energetic polymers |
| title_fullStr | Preparation and characterization of branched energetic polymers |
| title_full_unstemmed | Preparation and characterization of branched energetic polymers |
| title_short | Preparation and characterization of branched energetic polymers |
| title_sort | preparation and characterization of branched energetic polymers |
| topic | Engineering::Materials::Energy materials |
| url | https://hdl.handle.net/10356/147463 |
| work_keys_str_mv | AT wangzhongkang preparationandcharacterizationofbranchedenergeticpolymers |