Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties
Cross-linking frequently enhanced the mechanical properties of linear polymeric materials; however, it also resulted in the transition from thermoplastic to thermosetting materials, which posed issues from an environmental perspective. Thermoplastic polyurethane (TPU) elastomers were extensively app...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Budapest University of Technology
2025-03-01
|
| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0013178&mi=cd |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832590493095034880 |
|---|---|
| author | Wenxin Gan Hanyu Xue Hongyi Lin Renjin Gao Yuchi Zhang Liwei Wang Jiuping Rao |
| author_facet | Wenxin Gan Hanyu Xue Hongyi Lin Renjin Gao Yuchi Zhang Liwei Wang Jiuping Rao |
| author_sort | Wenxin Gan |
| collection | DOAJ |
| description | Cross-linking frequently enhanced the mechanical properties of linear polymeric materials; however, it also resulted in the transition from thermoplastic to thermosetting materials, which posed issues from an environmental perspective. Thermoplastic polyurethane (TPU) elastomers were extensively applied across various industries. To improve the mechanical properties of TPU while preserving its environmental benefits, this study integrated radical copolymerization technology to develop a reversible crosslinked TPU. Specifically, the linear polyurethane molecular chains were crosslinked using diallyl disulfide (DADS) as a functional cross-linking monomer. Through radical copolymerization reactions, reversible crosslinks formed from disulfide bonds were created between the linear polyurethane molecular chains, yielding a self-healing reversible crosslinked thermoplastic polyurethane (DSTPU). The study showed that DSTPU could self-heal and dissolve under UV light and alkaline N,N-dimethylformamide (DMF) conditions, achieving 82.2% self-healing efficiency at 3 phr DADS. It dissolved into fine particles in alkaline DMF. Disulfide bonds in DSTPU enhanced cross-linking, boosting 19% oxygen permeability, thermal conductivity (0.218 W/(m·K)), and mechanical properties like tensile stress (11.18 MPa), force (134.13 N), and elongation (548%). These bonds also enhanced aging resistance, cutting ΔYI to 6.0%. |
| format | Article |
| id | doaj-art-be7db0599639466b8c2a60b4a1df66cb |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-be7db0599639466b8c2a60b4a1df66cb2025-01-23T14:54:55ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2025-03-0119331132510.3144/expresspolymlett.2025.22Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking propertiesWenxin GanHanyu XueHongyi LinRenjin GaoYuchi ZhangLiwei WangJiuping RaoCross-linking frequently enhanced the mechanical properties of linear polymeric materials; however, it also resulted in the transition from thermoplastic to thermosetting materials, which posed issues from an environmental perspective. Thermoplastic polyurethane (TPU) elastomers were extensively applied across various industries. To improve the mechanical properties of TPU while preserving its environmental benefits, this study integrated radical copolymerization technology to develop a reversible crosslinked TPU. Specifically, the linear polyurethane molecular chains were crosslinked using diallyl disulfide (DADS) as a functional cross-linking monomer. Through radical copolymerization reactions, reversible crosslinks formed from disulfide bonds were created between the linear polyurethane molecular chains, yielding a self-healing reversible crosslinked thermoplastic polyurethane (DSTPU). The study showed that DSTPU could self-heal and dissolve under UV light and alkaline N,N-dimethylformamide (DMF) conditions, achieving 82.2% self-healing efficiency at 3 phr DADS. It dissolved into fine particles in alkaline DMF. Disulfide bonds in DSTPU enhanced cross-linking, boosting 19% oxygen permeability, thermal conductivity (0.218 W/(m·K)), and mechanical properties like tensile stress (11.18 MPa), force (134.13 N), and elongation (548%). These bonds also enhanced aging resistance, cutting ΔYI to 6.0%.http://www.expresspolymlett.com/letolt.php?file=EPL-0013178&mi=cd crosslinking polyurethane thermoplastic elastomer circular economy sustainable development recycling |
| spellingShingle | Wenxin Gan Hanyu Xue Hongyi Lin Renjin Gao Yuchi Zhang Liwei Wang Jiuping Rao Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties eXPRESS Polymer Letters crosslinking polyurethane thermoplastic elastomer circular economy sustainable development recycling |
| title | Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties |
| title_full | Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties |
| title_fullStr | Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties |
| title_full_unstemmed | Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties |
| title_short | Disulfide bond and free radical copolymerization endow TPU with reversible cross-linking properties |
| title_sort | disulfide bond and free radical copolymerization endow tpu with reversible cross linking properties |
| topic | crosslinking polyurethane thermoplastic elastomer circular economy sustainable development recycling |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0013178&mi=cd |
| work_keys_str_mv | AT wenxingan disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties AT hanyuxue disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties AT hongyilin disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties AT renjingao disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties AT yuchizhang disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties AT liweiwang disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties AT jiupingrao disulfidebondandfreeradicalcopolymerizationendowtpuwithreversiblecrosslinkingproperties |