Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes
A series of robust energetic polyurethane binders was developed by in situ grafting reactive spiranes to achieve the migration-resistant processing aid and compensate for the energy output. The reactive grafting spiranes (RGSs), bearing two highly ring-strained spiranes, were synthesized sequentiall...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-11-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/15/23/4564 |
| _version_ | 1797399620924473344 |
|---|---|
| author | Mingyang Ma Younghwan Kwon |
| author_facet | Mingyang Ma Younghwan Kwon |
| author_sort | Mingyang Ma |
| collection | DOAJ |
| description | A series of robust energetic polyurethane binders was developed by in situ grafting reactive spiranes to achieve the migration-resistant processing aid and compensate for the energy output. The reactive grafting spiranes (RGSs), bearing two highly ring-strained spiranes, were synthesized sequentially to provide a promising ring strain energy up to a maximum value of 290 kJ mol<sup>−1</sup>. The thermodynamic compatibility of the RGS with uncured glycidyl azido polymer (GAP) was studied quantitatively by analyzing the glass transition temperature of their blendings. The reactivity study of the catalyst-free click reaction with respect to spacer-dependent species was amplified by tracing the extent of the reaction and measuring the activation energy. The faster reactivity of propargyl species was evident from two experimental approaches, which were verified further by theoretical predictions. Interestingly, the energy gap difference in the frontier molecular orbitals agreed well with the difference in activation energy between the two types of spacer-dependent species. The mechanical and thermochemical enhancements of GAP-based polyurethane with RGS were basically gained from those highly ring-strained moieties. |
| first_indexed | 2024-03-09T01:43:42Z |
| format | Article |
| id | doaj.art-198c4e387513429bac96fe78f361f760 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T01:43:42Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-198c4e387513429bac96fe78f361f7602023-12-08T15:24:26ZengMDPI AGPolymers2073-43602023-11-011523456410.3390/polym15234564Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive SpiranesMingyang Ma0Younghwan Kwon1School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, ChinaDepartment of Chemical Engineering, Daegu University, Gyeongsan 712-714, Republic of KoreaA series of robust energetic polyurethane binders was developed by in situ grafting reactive spiranes to achieve the migration-resistant processing aid and compensate for the energy output. The reactive grafting spiranes (RGSs), bearing two highly ring-strained spiranes, were synthesized sequentially to provide a promising ring strain energy up to a maximum value of 290 kJ mol<sup>−1</sup>. The thermodynamic compatibility of the RGS with uncured glycidyl azido polymer (GAP) was studied quantitatively by analyzing the glass transition temperature of their blendings. The reactivity study of the catalyst-free click reaction with respect to spacer-dependent species was amplified by tracing the extent of the reaction and measuring the activation energy. The faster reactivity of propargyl species was evident from two experimental approaches, which were verified further by theoretical predictions. Interestingly, the energy gap difference in the frontier molecular orbitals agreed well with the difference in activation energy between the two types of spacer-dependent species. The mechanical and thermochemical enhancements of GAP-based polyurethane with RGS were basically gained from those highly ring-strained moieties.https://www.mdpi.com/2073-4360/15/23/4564polyurethanereactive plasticizerclick reactionbinderring strain energy |
| spellingShingle | Mingyang Ma Younghwan Kwon Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes Polymers polyurethane reactive plasticizer click reaction binder ring strain energy |
| title | Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes |
| title_full | Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes |
| title_fullStr | Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes |
| title_full_unstemmed | Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes |
| title_short | Simultaneous Enhancement of the Mechanical Properties, Performance and Insensitivity of an Energetic Elastomeric Polyurethane Binder by Kinetically Grafting Reactive Spiranes |
| title_sort | simultaneous enhancement of the mechanical properties performance and insensitivity of an energetic elastomeric polyurethane binder by kinetically grafting reactive spiranes |
| topic | polyurethane reactive plasticizer click reaction binder ring strain energy |
| url | https://www.mdpi.com/2073-4360/15/23/4564 |
| work_keys_str_mv | AT mingyangma simultaneousenhancementofthemechanicalpropertiesperformanceandinsensitivityofanenergeticelastomericpolyurethanebinderbykineticallygraftingreactivespiranes AT younghwankwon simultaneousenhancementofthemechanicalpropertiesperformanceandinsensitivityofanenergeticelastomericpolyurethanebinderbykineticallygraftingreactivespiranes |