Synergistically toughened epoxy resin based on modified-POSS triggered interpenetrating network

Yang, Jiaming; Zhang, Yonggang; Hao, Mengyuan; Zhi, Jianhai; Qian, Xin

doi:10.1016/j.polymer.2023.125719

Cited by 27 publications

(12 citation statements)

References 56 publications

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“…Meanwhile, the flexural strength and flexural modulus do not degrade, indicating that the soft chains successfully toughen the cured resins without sacrificing their strength. More information can be obtained from the morphology of fracture surfaces (Figure 4b), which are smooth in the case of EP-BIMB and rough in the case of EP-BIMB-S. Generally, numerous cracks are formed via plastic deformation and crazing, which can absorb energy and increase the energy required for fracture, 60,61 further confirming the toughening effect observed in impact tests.…”

supporting

confidence: 58%

Robust Vanillin-Derived Poly(thioether imidazoles) as Both a Latent Curing and Toughening Agent for One-Component Epoxy Resins

et al. 2023

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One-component epoxy resins based on latent curing agents have garnered research attention owing to their outstanding storage stability and excellent processability, while their development considerably depends on the design and preparation of sustainable latent curing agents. Herein, taking structural advantage of lignin-derived vanillin, a biobased polymerizable aromatic imidazole monomer with α,ω-diene functionality was designed and prepared, which was applicable in subsequent thiol–ene polymerization, yielding a series of robust poly(thioether imidazoles) with excellent tunability of the structure and properties. The findings indicated that the precursors comprising poly(thioether imidazole) and commercially available epoxy resins could keep their fluidity at 25 °C for over 90 days and rapidly cured into resins under elevated temperature, demonstrating that the poly(thioether imidazole) can serve as both a latent curing and toughening agent for one-component epoxy resins because of homopolymerization initiated by imidazole groups and the introduction of an aliphatic chain in the as-prepared poly(thioether imidazole) matrix.

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supporting

confidence: 58%

Robust Vanillin-Derived Poly(thioether imidazoles) as Both a Latent Curing and Toughening Agent for One-Component Epoxy Resins

et al. 2023

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“…Notably, by designing the topological structure and free volume of the cross-linked network, the ESi thermosets overcome the strength–toughness trade-off. In addition, to compare against previous reports and provide a graphical evaluation, the increments in toughness (elongation at break) and strength (tensile strength) of previously reported EPs are presented in Figure e. ,,,,,,– It shows that most current EPs exhibit a strength–toughness trade-off. Moreover, it is difficult to significantly improve toughness while noticeably increasing strength.…”

Section: Resultsmentioning

confidence: 94%

Novel Multifunction Epoxy Thermoset Designed by Manipulating the Silicon-Oxidation Flexible-Rigid Network Topology: Toughening, Strengthening, and Acid/Alkali Resistance

Xu,

Zhang,

Wang

et al. 2023

Ind. Eng. Chem. Res.

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“…nanocomposites, the rigidity effect, and the crosslinking density of the matrix. 28 HNTs and POSS cage structures may limit the fluidity of polymer chains. The active epoxy side groups on POSS can participate in the curing reaction, 29 leading to the formation of covalent bonds between HNTs-e-POSS and the polymer matrix.…”

Section: Dynamic Mechanical Analysis Of Hnts-e-poss/gaer Nanocompositesmentioning

confidence: 99%

“…Through covalent bonding, it achieves uniform dispersion and enhanced modification in the resin matrix. [28][29][30][31] However, due to the influence of steric hindrance, POSS modified epoxy resin may increase the unevenness of the crosslinking network in the curing system, thereby affecting the modification effect. Recently, some studies have prepared hybrid nanoparticles by combining POSS with other types of nanoparticles, utilizing the synergistic effect of the two types of nanoparticles to achieve modification.…”

Section: Introductionmentioning

confidence: 99%

“…POSS is a polyhedral cage structure with Si‐O‐Si rigid skeleton and reactive side groups, which enables it to design side group functional groups and achieve co‐curing with the matrix epoxy resin. Through covalent bonding, it achieves uniform dispersion and enhanced modification in the resin matrix 28–31 . However, due to the influence of steric hindrance, POSS modified epoxy resin may increase the unevenness of the crosslinking network in the curing system, thereby affecting the modification effect.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of HNTs‐e‐POSS hybrid nanoparticles and modification of gallic acid epoxy resin

Wang,

Zhao,

et al. 2023

Polymer Composites

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Gallic acid is a renewable plant phenolic resource, and the polyphenolic bio‐based epoxy resin prepared from it can be used as a substitute for bisphenol A epoxy resin in certain fields. However, bio‐based epoxy resins used in the field of high‐performance composite material matrices often require modification. In this paper, firstly, γ‐(2,3‐epoxypropoxy)propyl trimethoxysilane (KH560) was used as the raw material to prepare epoxy‐based cage silsesquioxanes (E‐POSS). Then, E‐POSS was grafted onto γ‐aminopropyltriethoxysilane (KH550) modified halloysite nanotubes (m‐HNTs) to prepare a novel hybrid nanoparticle HNTs‐e‐POSS. Experimental analysis shows that ring opening reactions of amino and epoxy groups can occur between m‐HNTs and E‐POSS, forming a hybrid nanoparticle system of POSS aggregates on the surface of HNTs. Bio‐based nanocomposites were prepared by adding different mass fractions of hybrid nanoparticles HNTs‐e‐POSS into polyphenol type gallic acid epoxy resin matrix (GAER) and using methyltetrahydrophthalic anhydride as curing agent. The properties and micromorphology of the composite were analyzed and characterized. The research showed that with the addition of HNTs‐e‐POSS nanoparticles, the strength and toughness of the composite resin system show a pattern of first increasing and then decreasing, while the storage modulus(E′), glass transition temperature (Tg), and thermal stability of the composite material increased. Mechanical performance analysis shows that the introduction of 0.5 wt% HNTs‐e‐POSS would increase the tensile strength of the composite by 25.46%, while adding 0.75 wt% HNTs‐e‐POSS can increase the impact strength by 15%. The E′(30°C) increased by 24.2% and Tg increased by 7.7°C when the HNTs‐e‐POSS addition was 0.25 wt%.Highlights Prepared hybrid nanoparticle HNTs‐e‐POSS by grafting POSS onto the HNTs surface. Application of HNTs‐e‐POSS in modification of bio‐based gallic acid epoxy resin. HNTs‐e‐POSS can co‐cured with epoxy matrix to increase the crosslinking degree. The strength, toughness, and modulus of gallic acid epoxy resin are improved. Tg and thermal stability of gallic acid epoxy resin are enhanced.

show abstract

Synergistically toughened epoxy resin based on modified-POSS triggered interpenetrating network

Cited by 27 publications

References 56 publications

Robust Vanillin-Derived Poly(thioether imidazoles) as Both a Latent Curing and Toughening Agent for One-Component Epoxy Resins

Robust Vanillin-Derived Poly(thioether imidazoles) as Both a Latent Curing and Toughening Agent for One-Component Epoxy Resins

Novel Multifunction Epoxy Thermoset Designed by Manipulating the Silicon-Oxidation Flexible-Rigid Network Topology: Toughening, Strengthening, and Acid/Alkali Resistance

Preparation of HNTs‐e‐POSS hybrid nanoparticles and modification of gallic acid epoxy resin

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