The sustainable shape recovery of polyurethane copolymer grafted with pendant anthryl group under extremely low temperature conditions
| العنوان: | The sustainable shape recovery of polyurethane copolymer grafted with pendant anthryl group under extremely low temperature conditions |
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| المؤلفون: | Hyang Mi Chung, Byoung Chul Chun, Jae Won Choi, Yong-Chan Chung |
| المصدر: | High Performance Polymers. 24:295-304 |
| بيانات النشر: | SAGE Publications, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Materials science, Polymers and Plastics, Organic Chemistry, Aromaticity, Grafting, chemistry.chemical_compound, chemistry, Reagent, Polymer chemistry, Ultimate tensile strength, Materials Chemistry, Copolymer, Pendant group, Spectroscopy, Polyurethane |
| الوصف: | The impact of the pendant anthryl group on the low temperature flexibility and tensile properties of a polyurethane block copolymer was investigated. The pendant anthryl group was designed to interrupt molecular interactions and to disturb the close contact between polyurethane (PU) chains through its rigid aromatic rings; thus, to improve the flexibility at extremely low temperatures, while maintaining high and reproducible tensile properties and the shape recovery at ambient temperatures. The attachment of the anthryl group was confirmed using the infrared (IR), nuclear magnetic resonance (NMR), and ultraviolet-visible (UV-VIS) spectroscopy. Increasing the anthryl content led to an unusual increase in the crosslink density due to partial crosslinking by the grafting reagent. The shape recovery and retention results were reproducible after performing repeated shape memory tests. Finally, the effect of the anthryl group on the shape recovery at −30 °C was compared with that of linear PU, and the reason for the remarkable flexibility at low temperature is discussed. |
| تدمد: | 1361-6412 0954-0083 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::72352401e14f1a8f29dc157786e2f828 https://doi.org/10.1177/0954008312439318 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........72352401e14f1a8f29dc157786e2f828 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13616412 09540083 |
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