BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property
Despite the high enthalpy of formation of poly(3,3-bis(azidomethyl)oxetane) (PBAMO), it is not readily applicable as a polymeric binder for propellants owing to its low chain flexibility and poor mechanical properties. The aim of this study was to improve the chain flexibility and mechanical propert...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2021-03-01
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| Series: | Energetic Materials Frontiers |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666647221000075 |
| _version_ | 1797936380887695360 |
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| author | Gang Tang Zaijuan Zhang Xiaoyu Li Yunjun Luo |
| author_facet | Gang Tang Zaijuan Zhang Xiaoyu Li Yunjun Luo |
| author_sort | Gang Tang |
| collection | DOAJ |
| description | Despite the high enthalpy of formation of poly(3,3-bis(azidomethyl)oxetane) (PBAMO), it is not readily applicable as a polymeric binder for propellants owing to its low chain flexibility and poor mechanical properties. The aim of this study was to improve the chain flexibility and mechanical properties of PBAMO binders by copolymerizing BAMO with tetrahydrofuran (THF) to produce a BAMO-THF copolyether (PBT). We report the preparation of energetic thermoplastic polyurethane elastomers (ETPUEs) by using PBT (soft segment), dicyclohexylmethylmethane-4,4′-diisocyanate (HMDI) (curing agent), a mixture of diols: diethyl bis(hydroxymethyl)malonate (DBM) (chain extender), 2-cyanoethyl-bis(2-hydroxyethyl)amine (CBA) (chain extender), and 1,4-butanediol (BDO) (chain extender). By systematically varying the content of the components, a series of ETPUEs was prepared. The results showed that with a fixed hard segment content, ETPUEs with CBA/BDO as chain extenders showed a stronger bonding property, lower glass transition temperature; improved mechanical properties (σm = 7.60 MPa, εb = 570.0%), and a higher enthalpy of formation (4015 kJ⋅mol−1). Moreover, when the ratio between CBA and BDO was 1:1, the binding strength between the binders and filler RDX was optimized, yielding a simulated propellant with decent mechanical properties (σm = 5.92 MPa, εb = 16.5%). |
| first_indexed | 2024-04-10T18:28:55Z |
| format | Article |
| id | doaj.art-8051f8256e2b41d48b06cb2e294e60ae |
| institution | Directory Open Access Journal |
| issn | 2666-6472 |
| language | English |
| last_indexed | 2024-04-10T18:28:55Z |
| publishDate | 2021-03-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Energetic Materials Frontiers |
| spelling | doaj.art-8051f8256e2b41d48b06cb2e294e60ae2023-02-02T04:50:03ZengKeAi Communications Co. Ltd.Energetic Materials Frontiers2666-64722021-03-01213239BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding propertyGang Tang0Zaijuan Zhang1Xiaoyu Li2Yunjun Luo3School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaSchool of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaSchool of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081, China; Corresponding author. School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; Key Laboratory of High Energy Density Materials, Ministry of Education, Beijing Institute of Technology, Beijing, 100081, China; Corresponding author. School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.Despite the high enthalpy of formation of poly(3,3-bis(azidomethyl)oxetane) (PBAMO), it is not readily applicable as a polymeric binder for propellants owing to its low chain flexibility and poor mechanical properties. The aim of this study was to improve the chain flexibility and mechanical properties of PBAMO binders by copolymerizing BAMO with tetrahydrofuran (THF) to produce a BAMO-THF copolyether (PBT). We report the preparation of energetic thermoplastic polyurethane elastomers (ETPUEs) by using PBT (soft segment), dicyclohexylmethylmethane-4,4′-diisocyanate (HMDI) (curing agent), a mixture of diols: diethyl bis(hydroxymethyl)malonate (DBM) (chain extender), 2-cyanoethyl-bis(2-hydroxyethyl)amine (CBA) (chain extender), and 1,4-butanediol (BDO) (chain extender). By systematically varying the content of the components, a series of ETPUEs was prepared. The results showed that with a fixed hard segment content, ETPUEs with CBA/BDO as chain extenders showed a stronger bonding property, lower glass transition temperature; improved mechanical properties (σm = 7.60 MPa, εb = 570.0%), and a higher enthalpy of formation (4015 kJ⋅mol−1). Moreover, when the ratio between CBA and BDO was 1:1, the binding strength between the binders and filler RDX was optimized, yielding a simulated propellant with decent mechanical properties (σm = 5.92 MPa, εb = 16.5%).http://www.sciencedirect.com/science/article/pii/S2666647221000075Solid propellantBinderEnergetic polymerThermoplastic elastomerPolyurethane |
| spellingShingle | Gang Tang Zaijuan Zhang Xiaoyu Li Yunjun Luo BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property Energetic Materials Frontiers Solid propellant Binder Energetic polymer Thermoplastic elastomer Polyurethane |
| title | BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property |
| title_full | BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property |
| title_fullStr | BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property |
| title_full_unstemmed | BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property |
| title_short | BAMO-THF copolymer-based energetic thermoplastic polyurethanes with a decent bonding property |
| title_sort | bamo thf copolymer based energetic thermoplastic polyurethanes with a decent bonding property |
| topic | Solid propellant Binder Energetic polymer Thermoplastic elastomer Polyurethane |
| url | http://www.sciencedirect.com/science/article/pii/S2666647221000075 |
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