DOI: 10.1016/j.jcou.2017.02.009
Scopus记录号: 2-s2.0-85013249469
论文题名: Bio-based thermo-healable non-isocyanate polyurethane DA network in comparison with its epoxy counterpart
作者: Karami Z. ; Zohuriaan-Mehr M.J. ; Rostami A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 18 语种: 英语
英文关键词: CO2 fixation
; Diels-Alder reaction
; Non-isocyanate polyurethane
; Thermo-healing
; Thermo-mechanical properties
Scopus关键词: Carbon dioxide
; Differential scanning calorimetry
; Dynamic mechanical analysis
; Ethers
; Polyurethanes
; Reusability
; Thermoanalysis
; Carbonation reactions
; Cross-link densities
; Diels-Alder reaction
; Dynamic mechanical thermal analysis
; Furfuryl glycidyl ethers
; Nonisocyanate polyurethane
; Thermo-healing
; Thermomechanical properties
; Thermogravimetric analysis
英文摘要: Graphical abstract: Degradability, reusability or healability of polymer networks have significant importance in features of the environmental, economic and materials application. This study deals with synthesis of a reversible non-isocyanate polyurethane (NIPU) network in comparison with its epoxy counterpart. First, furfuryl cyclocarbonate ether (FCE) was synthesized by a green method of CO2 fixation (carbonation reaction) on furfuryl glycidyl ether (FGE; a bio-based compound). Afterwards, Diels-Alder (DA) adducts were synthesized by the reaction between a bismaleimide and FGE or FCE. The DA adducts were characterized by 1H NMR and FTIR. Amine-curing of the adducts produced two different networks. According to dynamic mechanical thermal analysis, the existence of the cyclocarbonate ring resulted in the formation of a more flexible network having less cross-link density in comparison with its epoxy counterpart. Thermal behavior of the DA adducts were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis. The results showed a retro-DA process occurred at ∼130°C. Unlike the epoxy network, molecular disconnection of the NIPU network occurred completely at this temperature after 25min. Disconnected moieties of both networks were re-casted and DA re-structuring of networks was confirmed by solubility test and DSC. Finally, the NIPU showed superior thermo-healing behavior comparing with its epoxy counterpart. © 2017 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52777
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Karami Z.,Zohuriaan-Mehr M.J.,Rostami A.. Bio-based thermo-healable non-isocyanate polyurethane DA network in comparison with its epoxy counterpart[J]. Journal of CO2 Utilization,2017-01-01,18