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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Main Author: Wang, Zhongkang
Other Authors: Hng Huey Hoon
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2021
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Online Access:https://hdl.handle.net/10356/147463
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials::Energy materials
spellingShingle Engineering::Materials::Energy materials
Wang, Zhongkang
Preparation and characterization of branched energetic polymers
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.
author2 Hng Huey Hoon
author_facet Hng Huey Hoon
Wang, Zhongkang
format Final Year Project
author Wang, Zhongkang
author_sort Wang, Zhongkang
title Preparation and characterization of branched energetic polymers
title_short 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_sort preparation and characterization of branched energetic polymers
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/147463
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