A novel network construction method based on degenerative chain transfer effect to toughen hydrogels

Wang, Yi; Ouyang, Hongyan; Zhao, Lijuan; Wu, Jinrong

doi:10.1016/j.polymer.2021.124147

Cited by 3 publications

(8 citation statements)

References 32 publications

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“…The structures of synthesized hyperbranched polyether were recorded by infrared spectroscopy with Fouriertransform infrared (FTIR) on a Bruker VERTEX 80v spectrometer in the wavenumber range from 4000 to 500 cm À1 . The 1 H NMR and 13 C NMR spectra were determined by a Bruker AVANCE-III spectrometer (600 MHz) using d-CDCl 3 as the solvent. The molecular weights (M n , M w ) and dispersity (polymer dispersion index [PDI]) of the synthesized hyperbranched polyether were determined by a gel permeation chromatography, which was calibrated using monodispersed linear polystyrene calibration standards.…”

Section: Characterizations and Measurementsmentioning

confidence: 99%

“…3.2 | 1 H NMR and 13 C NMR spectra of EHBPE-IS 27 The signals at 5.97 ppm associate to the hydroxyl group. The signals at 6.82 and 7.14 ppm correspond to the aromatic protons of BPA.…”

Section: Infrared Characterization Of Ehbpe-is Ehbpe-s and Ehbpe-imentioning

confidence: 99%

“…12 The tensile strength and processibility of heterogeneous toughened systems by forming phase-separated morphologies used to be significantly compromised, as well as suppressed the flexibility in choosing processing conditions, and even shorten their service life. 13 In a homogeneous toughening system, the toughening agent distributed uniformly into the epoxy matrix, creating an interpenetrated networks of single-molecule or multimolecule aggregates, without the second phase-separation at the micro or nanoscale. 13 In contrast, "flexible segments" were more preferable since form nonphase-separated network could be introduced into the cross-linked three-dimensional network to enhance the activity of the network.…”

Section: Introductionmentioning

confidence: 99%

“…13 In a homogeneous toughening system, the toughening agent distributed uniformly into the epoxy matrix, creating an interpenetrated networks of single-molecule or multimolecule aggregates, without the second phase-separation at the micro or nanoscale. 13 In contrast, "flexible segments" were more preferable since form nonphase-separated network could be introduced into the cross-linked three-dimensional network to enhance the activity of the network. Hyperbranched polymers (HBPs) possessing flexible chain segments and bio-based materials are introduced into the cross-linked network of EP to obtain a homogeneous toughening system that significantly improves the toughness and strength of EP, manifesting potential as a nonphase-separated toughening agent in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Toughening modification of epoxy resins by epoxy‐terminated hyperbranched polyethers fabricated by doping sorbitol with inositol

Niu

et al. 2023

J of Applied Polymer Sci

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Increasing social awareness concerning the design of excellent performance toughening agents to curb the adverse effects of insufficient toughness on the wide range of applications of epoxy resin (EP). Herein, a small amount of sorbitol was doped into carbocyclic inositol as a core monomer, and bisphenol‐A and epichlorohydrin were used to produce epoxide‐terminated hyperbranched polyether by one‐pot preparation method. After that, the prepared polymer was used as modifier to improve the toughness and strength of petroleum‐based EPs. Results demonstrated that after adding the homemade epoxy‐terminated hyperbranched polyether (EHBPE) to the EP, the polyether prepared with the ratio of sorbitol and inositol displayed significant advantages compared with the polyether with monomers using only sorbitol and inositol, respectively. In particular, the impact, and tensile strengths of EHBPE‐IS/EP cured sample with EHBPE‐IS loading at 20% were increased by 197.5%, 139.6%, respectively, compared with those of neat EP. In brief, EHBPE‐IS, a member of the family of EHBPEs, provided a facile method for the preparation of bifunctional modifier for tough and strong EP with promising industrial applications.

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Section: Characterizations and Measurementsmentioning

confidence: 99%

“…3.2 | 1 H NMR and 13 C NMR spectra of EHBPE-IS 27 The signals at 5.97 ppm associate to the hydroxyl group. The signals at 6.82 and 7.14 ppm correspond to the aromatic protons of BPA.…”

Section: Infrared Characterization Of Ehbpe-is Ehbpe-s and Ehbpe-imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Toughening modification of epoxy resins by epoxy‐terminated hyperbranched polyethers fabricated by doping sorbitol with inositol

Niu

et al. 2023

J of Applied Polymer Sci

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show abstract

“…This rapid and straightforward "one-step" toughening strategy can be exploited to directly synthesize hydrogels, especially hydrogels whose backbone is only soluble in water. Wang et al [182] also provided a simple strategy to be used even in actual industrialized production. The re-action kinetics of PAAM hydrogels were controlled by the degenerate chain transfer effect of monomers, and the growth of active chains was suppressed.…”

Section: Other Unique New Strategies and Mechanismsmentioning

confidence: 99%

Recent Advances in Design Strategies of Tough Hydrogels

Zhang

Xiang

Yang

et al. 2022

Macromol. Rapid Commun.

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Hydrogels are a fascinating class of materials popular in numerous fields, including tissue engineering, drug delivery, soft robotics, and sensors, thanks to their 3D network porous structure containing a significant amount of water. However, traditional hydrogels exhibit poor mechanical strength, limiting their practical applications. Thus, many researchers have focused on the development of mechanically enhanced hydrogels. This review describes the design considerations for constructing tough hydrogels and some of the latest strategies in recent years. These tough hydrogels have an up‐and‐coming prospect and bring great hope to the fields of biomedicine and others. Nonetheless, it is still no small challenge to realize hydrogel materials that are tough, multifunctional, intelligent, and with zero defects.

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Improved electro-actuated property of polydimethylsiloxane-based dielectric elastomer by designing a Bi-network structure

Wang,

Zhao,

Zhang

et al. 2024

Polymer

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A novel network construction method based on degenerative chain transfer effect to toughen hydrogels

Cited by 3 publications

References 32 publications

Toughening modification of epoxy resins by epoxy‐terminated hyperbranched polyethers fabricated by doping sorbitol with inositol

Toughening modification of epoxy resins by epoxy‐terminated hyperbranched polyethers fabricated by doping sorbitol with inositol

Recent Advances in Design Strategies of Tough Hydrogels

Improved electro-actuated property of polydimethylsiloxane-based dielectric elastomer by designing a Bi-network structure

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