Atom-economical preparation of polybismaleimide-based microporous organic polymers

Taking advantage of the reversible Diels-Alder (DA) reaction, a simple strategy to obtain recyclable epoxy resins is presented. For this purpose, blends of furan-functionalized and nonfunctionalized epoxy resin are prepared. After the addition of diamine and bismaleimide, blends are heated at 150°C for 5 min, where the permanent amine/epoxy reaction has taken place and upon cooling to room temperature the reversible DA reaction has happened, giving rise to a dual permanent/nonpermanent network. Both reactions are confirmed by Fourier-transform infrared (FTIR) and 13 C-crosspolarization, magic-angle spinning (CP/MAS) nuclear magnetic resonance (NMR). Modulated differential scanning calorimetry (MDSC)shows that the epoxy/amine and bismaleimide/amine curing reaction take place, after the DA reaction, simultaneously with the retroDA reaction and before the bismaleimide homopolymerization. Therefore, under the appropriate curing conditions, the Michael's addition and the bismaleimide homopolymerization do not avoid the formation of a hybrid network, as stated in other reports. The reversibility of the DA reaction in three consecutive cycles is confirmed by DSC. Finally, the dual-cured sample is reprocessed three times without significant loss of mechanical properties.

show abstract

“…These changes evidenced the breaking of the bismaleimide double band because of its homopolymerization reaction. [42]…”

Section: Methodsmentioning

confidence: 99%

Recyclable Epoxy Resin via Simultaneous Dual Permanent/Reversible Crosslinking Based on Diels–Alder Chemistry

Puyadena

Calafel

Román

et al. 2021

Macro Chemistry & Physics

View full text Add to dashboard Cite

show abstract

“…This also can enrich the PC performance. In addition, we examined the CD performance for Car-CTF-5-500 over the range of À 1.0 to 0.0 V, using currents of 10,11,12,14,15,16,17,18,19 and 20 μA/cm 2 [ Figure 6(g)]. The CD curves reveal typical symmetrical CD patterns with a negligible internal resistance drop, indicating that the hybridization did not induce further resistive structure.…”

Section: Electrochemical Performance and Co 2 Uptake Propertiesmentioning

confidence: 99%

“…To ensure excellent reversibility and rapid transfer of electrolyte ions at the interface between the electrolyte and the electrode, the electrode materials should possess a hierarchical porous structure and a large electrolyte surface area . Accordingly, several advanced porous materials prepared with heteroatom doping, high surface areas, controllable pore size distributions, and excellent electrochemical stability, including covalent triazine‐based frameworks (CTFs), conjugated microporous polymers (CMPs), and metal organic frameworks (MOFs), are promising candidates for use as electrode materials in energy storage devices . CTFs are a subclass of covalent organic frameworks (COFs); they are high‐performance microporous polymeric materials .…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Microporous Bicarbazole‐Based Covalent Triazine Frameworks for High‐Performance Energy Storage and Carbon Dioxide Uptake

et al. 2019

View full text Add to dashboard Cite

In this study a series of bicarbazole‐based covalent triazine frameworks (Car‐CTFs) were synthesized under ionothermal conditions from [9,9'‐bicarbazole]‐3,3',6,6'‐tetracarbonitrile (Car‐4CN) in the presence of molten zinc chloride. Thermogravimetric and Brunauer−Emmett−Teller analyses revealed that these Car‐CTFs possessed excellent thermal stabilities and high specific surface areas (ca. 1400 m2/g). The electrochemical performances of this Car‐CTF series, investigated by using cyclic voltammetry, showed a highest capacitance of (545 F/g at 5 mV/s), which also exhibited excellent columbic efficiencies of 96.1 % after 8000 cycles at 100 μA/0.5 cm2. The other Car‐CTF samples displayed similar efficiencies. Furthermore, based on CO2 uptake measurements, one of the series showed the highest CO2 uptake capacities: 3.91 and 7.60 mmol/g at 298 and 273 K, respectively. These results suggest a simple method for the preparation of CTF materials that provide excellent electrochemical and CO2 uptake performance.

show abstract

“…The formed diimide, functionalised with dicarboxylic acids, was then condensed with the tetraamine monomers C5 and C6 to produce benzimidazole linked pPIs. Lu et al 24 and Zhu et al 25 condensed maleic anhydride with the appropriate diamine linker to yield the preformed monomer diimides M4-6. Lu et al 24 then used diimide M4 and crosslinkers N1 and N2 to generate pPIs via click reactions.…”

Section: Introductionmentioning

confidence: 99%

Crosslinked porous polyimides: structure, properties and applications

et al. 2021

View full text Add to dashboard Cite

show abstract

Atom-economical preparation of polybismaleimide-based microporous organic polymers

Abstract: In this study, a green and atom economical strategy has been developed to construct polybismaleimide-based microporous organic polymers (BMOPs).

Cited by 23 publications

References 51 publications

Recyclable Epoxy Resin via Simultaneous Dual Permanent/Reversible Crosslinking Based on Diels–Alder Chemistry

Recyclable Epoxy Resin via Simultaneous Dual Permanent/Reversible Crosslinking Based on Diels–Alder Chemistry

Direct Synthesis of Microporous Bicarbazole‐Based Covalent Triazine Frameworks for High‐Performance Energy Storage and Carbon Dioxide Uptake

Crosslinked porous polyimides: structure, properties and applications

Contact Info

Product

Resources

About