Preparation and properties of aniline chain‐extended thermoplastic epoxy resin using triphenylphosphine as catalyst

Cheng, Chong; Wang, Jun; Yang, Shuang; Wang, Jingsheng; Chen, Xi; Jia, Yue; Chen, Qiufei; Guo, Pengzong; Xiao, Wang; Liu, Fu

doi:10.1002/pat.5513

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…In chemical industry, anilines are widely used as a kind of basic chemical for the synthesis of pesticides, organic dyes, medicines, resins, etc [1,2]. Generally, anilines are produced by the catalytic hydrogenation of corresponding nitro-aromatics or halogenated nitro-aromatics over numerous supported noble metal catalysts such as Pt, Ru, Au, Pd and Ir [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

Tan¹,

Lan²,

Wu³

et al. 2023

Nanotechnology

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The graphene-like wrapped Ni@C catalysts were facilely synthesized by a modified sol-gel method. Nickel nitrate and citric acid (CA) were adopted as the raw materials to form sol-gel mixture. Under the circumstances, the additive CA were employed not only as a complexing agent but also as a carbon source. It is found that the calcination temperature and the mole ratios between Ni and CA are the key factors affecting the physical property and the catalytic performance of catalysts in the conversion of nitroarenes into corresponding anilines. The results show that the Ni@C-500(1:1) catalyst exhibited the best performance in the hydrogenation of o-chloronitrobenzenes (o-CNB) to o-chloroanilines (o-CAN). The yield of o-CAN was achieved at 100 % when o-CNB was completely converted at 40.0 ℃ under 2.0 MPa H2 for 2.0 hours. Furthermore, the Ni@C-500(1:1) catalyst could be separated and recovered easily after reaction by an external magnetic field. The investigated results indicate that the Ni@C-500(1:1) catalyst remained higher activity after using twelve times. More importantly, this kind of catalyst is also active for the selective hydrogenation of other nitroarenes into the corresponding anilines. This new synthetic method may pave a way for producing low-cost Ni@C catalysts on a large scale, which is attractive for industrial anilines applications.

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Section: Introductionmentioning

confidence: 99%

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

Tan¹,

Lan²,

Wu³

et al. 2023

Nanotechnology

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“…[1][2][3][4] Many recyclable elastomers based on non-covalent bonds (hydrogen bonding, [5,6] metal ion coordination bonding, [7] host-guest interactions [8] ) have been developed in the last decade. Compared to the noncovalent cross-linked network structure, such as instability and low mechanical strength, dynamically reversible covalent crosslinked (dynamic imine bonds, [9][10][11] disulfide bonds, [12,13] D-A bonds, [14,15] and acylamino-urea bonds [16] ) elastomers avoid these problems and make the elastomer dimensionally stable, high mechanical strength, solvent resistance.…”

Section: Introductionmentioning

confidence: 99%

Tannic Acid Crosslinked Self‐Healing and Reprocessable Silicone Elastomers with Improved Antibacterial and Flame Retardant Properties

Jiao

Rong

Gao

et al. 2022

Macromol. Rapid Commun.

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Silicone elastomers are widely used in aviation, electronics, automotive, and medical device fields, and their overuse inevitably causes recycled problems. In addition, the elastomers are subject to attack by bacteria and fire during use in some application scenarios, which is a safety hazard. Therefore, there is a great need to prepare silicone elastomers with improved antibacterial, flame retardant, self-healing, and recyclable functions. A new strategy is proposed to prepare silicone elastomers with bio-based tannic acid as cross-linkers to solve this problem by using polydimethylsiloxane as a soft chain segment and 2,2-bis(hydroxymethyl)propionic acid as an intermediate chain extender. Based on the phenol carbamate bonding and hydrogen bonding interactions, the elastomer has efficient self-healing ability and can achieve dynamic dissociation at 120 °C for complete recovery. In addition, due to the unique spatial structure and polyphenolic hydroxyl groups of tannic acid, the mechanical properties of the elastomer are greatly improved with an antimicrobial efficiency of over 90% and a final oxygen index of 25.5%. The multifunctional silicone elastomer has great potential applications in recyclable refractory materials and antimicrobial materials.

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“…Epoxy resin (EP) is widely used in electronics, machinery, chemical industries, aerospace, construction, and other fields because of its high mechanical and adhesive strength, excellent electrical properties, and good protection of materials. 1,2 The general epoxy resin is flammable. Suppose a high temperature or open fire occurs in the use process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a multifunctional flame retardant epoxy resin containing phosphorus and nitrogen and study of its properties

Zhang

Pan

Chang

et al. 2022

J of Applied Polymer Sci

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A highly reactive intrinsic epoxy flame retardant FREP was successfully synthesized via ring‐opening reaction between DOPO and amino‐tetrafunctional epoxy resin (AG‐601), and the structure of the synthesized FREP was characterized by FTIR and MS. FREP was then introduced into the epoxy resin as an additive, aiming to improve fire safety. The flame‐retardant properties and thermal stabilities of epoxy thermosets were investigated by limiting oxygen index (LOI), vertical burning test (UL94) and cone calorimetry (CONE). The results indicated that EP/FREP‐4 thermoset passed UL94 V‐0 rating with a LOI value of 34.6%, where the phosphorus content was 1.5 wt%. When compared with neat EP, the peak heat release rate (pk‐HRR), total heat release (THR) and total smoke production (TSP) decreased by 63.1%, 42.6%, and 22.1%, respectively. Meanwhile, the lower av‐EHC of EP/FREP thermosets indicated that FREP plays a significant role in gas‐phase flame retardancy. Additionally, DMA analysis showed that FREP improved the crosslinking density of EP, which had little effect on the glass transition temperature (Tg). Thermogravimetric analysis (TGA), Py‐GC/MS analysis, and SEM were used to investigate the flame retardant mechanism. Excellent flame retardancy was attributed to phosphorus and nitrogen's synergistic effect in the gas and condensed phases.

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Preparation and properties of aniline chain‐extended thermoplastic epoxy resin using triphenylphosphine as catalyst

Cited by 7 publications

References 36 publications

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

Tannic Acid Crosslinked Self‐Healing and Reprocessable Silicone Elastomers with Improved Antibacterial and Flame Retardant Properties

Preparation of a multifunctional flame retardant epoxy resin containing phosphorus and nitrogen and study of its properties

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