A new class of high-performance thermoset resins using dicyanoimidazole (DCI) as crosslinking group: A key demo of synthesis, curing behavior and thermal properties

Zhu, Zhengzhu; He, Xiancong; Tan, Wei; Hong, Jinlang; Liao, Shenjun; Lv, Juan; Zeng, Ke; Hu, Jianghuai; Ye, Gang

doi:10.1016/j.polymer.2021.124264

Cited by 13 publications

(10 citation statements)

References 40 publications

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“…Meanwhile, the stretching vibration peak at 3220 cm −1 attributed to the imidazole NH disappeared, while a new absorption peak at 3370 cm −1 appeared in the cured product. Combined with our previous study, 16 imidazole NH may be involved in the curing reaction of CN, and the peak at 3370 cm −1 may be the NH peak of the intermediate of the CN curing reaction. An obvious characteristic peak of the triazine appears at 1520 cm −1 (Figure 6b), indicating that there is a triazine in the cured product.…”

Section: Resultssupporting

confidence: 79%

“…The excellent thermal stability of the triazine can provide the thermostability of the cured PBhDCI. Combined with the previous study, 16,29 the proposed curing mechanism of PBhDCI polymer were shown in Figure 7. Dynamic mechanical analysis (DMA) was used to evaluate the thermomechanical properties of PBhDCI polymers.…”

Section: Cured Products Of Pbhdcisupporting

confidence: 59%

“…The synthesis of PBhDCI monomer refers to the Schiff base ring‐closed preparation route for DCI proposed in our laboratory 16 …”

Section: Methodsmentioning

confidence: 99%

“…It also can form a π-π conjugation with the surface of carbon fiber to enhance the bonding strength of resin-fiber interface, 14 and make the resin and fiber compatible. Recently, our laboratory has introduced dicyanoimidazole (DCI) into the resin field, 15,16 and designed a brand new AN resin-DCI resins. Similar to phthalonitrile, DCI resin monomers have a structure of two cyano groups ( CN) involved in the curing reaction attached to a thermally stable aromatic ring (imidazole).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the curing products of CN in DCI resins tend to form triazines, which imparts excellent thermostability to DCI resins. The preliminary prepared DCI resin model monomer (4PODCI) with a glass transition temperature ( T g ) of over 500°C and a thermal decomposition temperature (usually measured as 5% weight loss temperature‐ T 5% ) up to 592°C 16 . The development of DCI resins has given a new impetus to the development of HPCFRP.…”

Section: Introductionmentioning

confidence: 99%

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Dicyanoimidazole resin with bisphenol A moiety: Synthesis, processing, properties, and composites

Zhu

et al. 2022

J of Applied Polymer Sci

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Developing high-performance polymer (HPP) with improved properties by green processing method is one of the core parts of HPP research. In this paper, a new monomer (4,4 0 -((propane-2,2-diylbis(4,1-phenylene))bis(oxy)) dibenzaldehyde (PBhDCI)) of high-performance aromatic nitrile-based (AN) resins with good solubility in ethanol was designed. The rheological analysis showed that PBhDCI is suitable for the processing by laminating process.The cured resins and the corresponding carbon fiber reinforced plastics (CFRP) showed outstanding thermal and mechanical properties. The thermal decomposition temperature (T 5% ) of the cured PBhDCI under nitrogen up to 510 C, the glass transition temperature (T g ) of both resin matrix and CFRP exceeds 500 C, and the flexural strength and modulus of CFRP were 507 ± 5 MPa and 59 ± 2 GPa. This work will offer some guidance for the preparation of high-performance resins and corresponding CFRP with a green processing and high thermal and mechanical properties.

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Section: Resultssupporting

confidence: 79%

Section: Cured Products Of Pbhdcisupporting

confidence: 59%

“…The synthesis of PBhDCI monomer refers to the Schiff base ring‐closed preparation route for DCI proposed in our laboratory 16 …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dicyanoimidazole resin with bisphenol A moiety: Synthesis, processing, properties, and composites

Zhu

et al. 2022

J of Applied Polymer Sci

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Improvement in the toughness and adhesive properties of cyanate ester resin by incorporation of fluorinated poly(aryl ether nitrile)

Liu,

Sun,

et al. 2023

J of Applied Polymer Sci

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Cyanate ester (CE) resins possess excellent thermal and mechanical characteristics, yet their brittleness and high cross‐link density limit their practical application. To overcome this limitation, the modification of CE with thermoplastic resins has been employed as an effective strategy to enhance their toughness and mechanical properties. In this study, a novel fluorinated poly(aryl ether nitrile) (PFPEN) with excellent solubility and thermal properties was synthesized through a nucleophilic substitution reaction. The effect of the addition of PFPEN on a blend composed of bisphenol A cyanate ester (ACE) and a mixed catalyst was investigated. Differential scanning calorimetry results showed that the addition of PFPEN facilitated the curing reaction of ACE, resulting in a lower exothermic peak temperature. Compared to the pure ACE, the addition of PFPEN at 20 phr significantly improved the tensile and impact strengths of the resin, as well as enhanced the lap shear strength at room temperature by 36% and the peel strength by 320%, respectively. The scanning electron microscope results showed a ductile fracture mechanism. However, it should be noted that the decrease in crosslinking density resulting from the addition of PFPEN may affect the lap shear strength at 300°C and the glass transition temperature (Tg) of the material.

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Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking

Jin,

Zhu,

Wang

et al. 2024

Chin J Polym Sci

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A new class of high-performance thermoset resins using dicyanoimidazole (DCI) as crosslinking group: A key demo of synthesis, curing behavior and thermal properties

Cited by 13 publications

References 40 publications

Dicyanoimidazole resin with bisphenol A moiety: Synthesis, processing, properties, and composites

Dicyanoimidazole resin with bisphenol A moiety: Synthesis, processing, properties, and composites

Improvement in the toughness and adhesive properties of cyanate ester resin by incorporation of fluorinated poly(aryl ether nitrile)

Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking

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