Improving creep resistance while maintaining reversibility of covalent adaptive networks via constructing reversibly interlocked polymer networks

You, Yang; Fu, Mei; Rong, Min Zhi; Zhang, M.Q.

doi:10.1016/j.mtchem.2021.100687

Cited by 16 publications

(22 citation statements)

References 50 publications

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“…Our earlier studies revealed that the interlocked networks are rather homogeneous. 27–32 The same is true for the current material. Micro-Raman mapping of the relative intensity of CN to benzene for LCE-SchB 0.067 (Fig.…”

Section: Resultsmentioning

confidence: 69%

“…2a and b), as a result of the unique forced miscibility of ILNs. [27][28][29][30][31][32] Besides, the equilibrium swelling degree of ILCE 0.067/0.2 -1 is the lowest in comparison with those of LCE-SchB 0.067 and LCE-DA 0.2 (Fig. 2c).…”

Section: Basic Characterizationmentioning

confidence: 90%

“…ILLCE x/y was fabricated from LCE-SchB x and LCE-DA y , referring to the method described elsewhere. [27][28][29][30][31][32] Typically, chips of LCE-SchB 0.067 (5 g) and LCE-DA 0.2 (5 g) were separately dissolved in the co-solvent DMF after heating at 80 1C for 6 h and 150 1C for 30 min, respectively. Next, the solutions were mixed at 80 1C under stirring for 30 min.…”

Section: Synthesismentioning

confidence: 99%

“…In this context, the recently emerged interlocked polymer networks (ILNs) [27][28][29][30][31][32] may provide a useful solution. ILNs are derived from two crosslinked polymers containing orthogonal reversible covalent bonds through topological rearrangement.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhancement of intrinsic thermal conductivity of liquid crystalline epoxy through the strategy of interlocked polymer networks

Yuan

Peng

Rong

et al. 2022

Mater. Chem. Front.

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Section: Resultsmentioning

confidence: 69%

Section: Basic Characterizationmentioning

confidence: 90%

Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of intrinsic thermal conductivity of liquid crystalline epoxy through the strategy of interlocked polymer networks

Yuan

Peng

Rong

et al. 2022

Mater. Chem. Front.

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“…A series of thermally-reversible bonds such as Diels-Alder bonds, boron esters, disulfide bonds, hydrogen bonds, metal coordination, and 𝜋-𝜋 stacking have already endowed polyurethane with excellent selfhealing properties. [11][12][13] Comparatively, ureidopyrimidone (UPy) can form self-complementary multiple hydrogen bonds and has rapid reversibility, making it a good choice for fabricating self-healing polyurethane. [14][15][16][17][18] Li et al [16] synthesized a supertough self-healing elastomer (345 mJ m −3 ) by controlling the nanophase structure through hierarchical hydrogen bonding.…”

Section: Introductionmentioning

confidence: 99%

UV‐Curable Polyurethane Elastomer with UV‐Irradiation/Thermo Dual‐Activated Self‐Healability

Lin

et al. 2022

Macro Materials & Eng

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Self‐healable polyurethane elastomers have potential applications in many fields, however, their use is limited by single self‐healing mechanism, intricate preparation process, and long curing time. Herein, a UV‐irradiation/thermo dual‐induced self‐healing polyurethane elastomer is prepared by UV‐curing two kinds of acrylates, where one includes a quadruple hydrogen bond (PU‐UPy‐HEA) and the other contains a disulfide bond (SS‐MA). UV‐curing kinetics indicate that the conversion of acrylates is significantly improved by tuning the irradiation intensity, photoinitiator dosage, and SS‐MA content. A maximum conversion of 80% is achieved within 10 s under 200 mW cm−2 in the case of the 1.5 wt% photoinitiator. The tensile strength of UV‐cured polyurethane elastomer is notably improved by SS‐MA, whereas its elongation at break decreases. Tensile shear tests demonstrates that the bisected samples can be re‐bonded when they are repaired at 100 °C for 15 min, or under 200 mW cm−2 irradiation for 1 h. After that, ≈90% of shear strength is recovered and the strength is only slightly reduced after two healing cycles. Self‐healing mainly relies on thermally reversible hydrogen bonding interactions and UV‐induced disulfide metathesis. This UV‐cured self‐healable polyurethane elastomer can be used in smart coatings as well as in other fields.

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Phosphonate‐influenced Diels‐Alder chemistry toward multi‐path recyclable, fire safe thermoset and its carbon fiber composites

Lü

et al. 2023

EcoMat

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Dynamic covalent chemistry offers a solution to tackle the recycling issue of epoxy resins (EPs) and their carbon fiber‐reinforced composites; however, the vulnerability to creep associated with the inflammable nature of the EPs are the key obstacles for their applications. Herein, we propose a feasible and facile strategy to overcome these obstacles by incorporating phosphorus‐influenced Diels‐Alder (DA) chemistry to construct dynamic epoxy networks. In the strategy, the electron‐withdrawing phosphonate in the dienophile maleimide greatly promotes the thermal stability of the DA reaction, exhibiting excellent creep resistance, repairability, and malleability; while its flame‐retardant activity improves the fire safety of the resultant thermosets. Meanwhile, nondestructive recycling of carbon fiber is achieved. The ease with which EP and its composites can be manufactured, used, recycled and re‐used–without losing service performance–points to new orientation in sustainable composites.image

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Improving creep resistance while maintaining reversibility of covalent adaptive networks via constructing reversibly interlocked polymer networks

Cited by 16 publications

References 50 publications

Enhancement of intrinsic thermal conductivity of liquid crystalline epoxy through the strategy of interlocked polymer networks

Enhancement of intrinsic thermal conductivity of liquid crystalline epoxy through the strategy of interlocked polymer networks

UV‐Curable Polyurethane Elastomer with UV‐Irradiation/Thermo Dual‐Activated Self‐Healability

Phosphonate‐influenced Diels‐Alder chemistry toward multi‐path recyclable, fire safe thermoset and its carbon fiber composites

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