Dramatic toughness enhancement of benzoxazine/epoxy thermosets with a novel hyperbranched polymeric ionic liquid

Chen, Shiyuan; Zhang, Junheng; Zhou, Jianping; Zhang, Daohong; Zhang, Aiqing

doi:10.1016/j.cej.2017.11.104

Cited by 105 publications

(60 citation statements)

References 46 publications

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“…1a-6) in benzoxazine-epoxy thermoset systems. 68 Benzoxazine can polymerize through a ring opening reaction to form condensed phenolic structures and the addition of an epoxy component improves its fracture toughness. The benzoxazine component was obtained from a bisphenol-F benzoxazine and the epoxy component was derived from 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate.…”

Section: Toughness Enhanced Resinsmentioning

confidence: 99%

Multifunctionality in Epoxy Resins

2019

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Epoxy resin will continue to be in the forefront of many thermoset applications due to its versatile properties. However, with advancement in manufacturing, changing societal outlook for the chemical industries and emerging technologies that disrupt conventional approaches to thermoset fabrication, there is a need for a multifunctional epoxy resin that is able to adapt to newer and robust requirements. Epoxy resins that behave both like a thermoplastic and a thermoset resin with better properties are now the norm in research and development. In this paper, we viewed multifunctionality in epoxy resins in terms of other desirable properties such as its toughness and flexibility, rapid curing potential, self-healing ability, reprocessability and recyclability, high temperature stability and conductivity, which other authors failed to recognize. These aspects, when considered in the synthesis and formulation of epoxy resins will be a radical advance for thermosetting polymers, with a lot of applications. Therefore, we present an overview of the recent finding as to pave the way for varied approaches towards multifunctional epoxy resins.

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Section: Toughness Enhanced Resinsmentioning

confidence: 99%

Multifunctionality in Epoxy Resins

2019

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“…[23][24][25][26][27] Actually, studies on the functional properties of PIL used as solid ionic conductors or dielectric properties, [28][29][30][31] powerful dispersant and stabilizer, 32 absorbent, 33,34 porous polymer [35][36][37] have been extensively reported; while there are relatively few studies dealing with the inuences of PIL on the mechanical and functional properties of other polymers. It is reported that introducing PIL can prominently enhance the toughness, tensile strength, dielectric properties and thermal performance of polymers, but focused on the hyper branched polymeric ionic liquids (HPILs) [38][39][40] and PIL used as modier for carbon llers. [41][42][43] For instance, Zhang et al 38 found that the cross linking reaction between diglycidyl ether of bisphenol A (DGEBA) and methylhexahydrophthalic anhydride (MHHPA) is accelerated by a hyper branched ionic liquid (HBP-Mim), and the impact, tensile and exural strength are signicantly improved by 131.0%, 63.1% and 135.2% in the presence of 9 phr HBP-Mim, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…[41][42][43] For instance, Zhang et al 38 found that the cross linking reaction between diglycidyl ether of bisphenol A (DGEBA) and methylhexahydrophthalic anhydride (MHHPA) is accelerated by a hyper branched ionic liquid (HBP-Mim), and the impact, tensile and exural strength are signicantly improved by 131.0%, 63.1% and 135.2% in the presence of 9 phr HBP-Mim, respectively. Chen et al 40 showed that, for benzoxazine/epoxy composites, the curing temperature is remarkably lowered by the introduction of HPILs (HBP-[AMIM][PF 6 ]) meanwhile the mechanical and thermal performances are improved. Moreover, PIL can be used as an effective dispersant or interfacial modier of graphene 42,43 and nanotube 41 in the polymer matrix, which can enhance the dispersion of nanoparticles and thus improve the properties of composites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of poly(ionic liquid) for trifunctional epoxy resin with simultaneously enhancing the toughness, thermal and dielectric performances

Yin

Liu

et al. 2020

RSC Adv.

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“…Network structure has a significant effect on the properties of composites. Many researchers have studied the reaction mechanism of the network structure formation between EP composites with BOZ . The reaction is more complicated with amine hardeners than without hardeners .…”

Section: Introductionmentioning

confidence: 99%

Intrinsic flame‐retardant epoxy resin composites with benzoxazine: Effect of a catalyst and a low curing temperature

Chen

Song

Wang

et al. 2019

J of Applied Polymer Sci

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Three kinds of inherent flame‐retardant epoxy resin (EP) composites with 20 wt % benzoxazine (BOZ) were prepared with different curing processes with 2‐methyl‐1H‐imidazole (MI) as a catalyst or/and changes in the curing temperature. The effects of the curing process on the flame retardancy, thermal stability, mechanical properties, and curing behaviors were investigated. The composite with added MI cured at low temperature (EBM–LT) had the best properties. It possessed a 35.3% limiting oxygen index and achieved a UL 94 V‐0 rating. Thermogravimetric analysis indicated that EBM–LT had the best thermal stability among the three kinds of EP composites with BOZ. The EP composites with BOZ mainly displayed a condensed‐phase flame‐retardant mechanism. The mechanical properties improvement was attributed to the formation of a heterogeneous network. Differential scanning calorimetry indicated that MI reacted with EP and catalyzed the homopolymerization of BOZ, and EP reacted with BOZ. Fourier transform infrared spectroscopy analysis indicated that curing at lower temperature caused the formation of more homopolymers of BOZ. The relationship of the curing process, network structure, and properties of EP composites with BOZ was established; this could help with the design of high‐performance EP composites with BOZ. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47847.

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Dramatic toughness enhancement of benzoxazine/epoxy thermosets with a novel hyperbranched polymeric ionic liquid

Cited by 105 publications

References 46 publications

Multifunctionality in Epoxy Resins

Multifunctionality in Epoxy Resins

Synthesis of poly(ionic liquid) for trifunctional epoxy resin with simultaneously enhancing the toughness, thermal and dielectric performances

Intrinsic flame‐retardant epoxy resin composites with benzoxazine: Effect of a catalyst and a low curing temperature

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