Microencapsulation of imidazole curing agent for epoxy resin

Ham, Young Rok; Lee, Dong Hoon; Kim, Sun Hee; Shin, Young Jae; Yang, Minhee; Shin, Jae Sup

doi:10.1016/j.jiec.2010.07.011

Cited by 86 publications

(18 citation statements)

References 17 publications

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“…Interestingly, Shin and coworkers [231][232][233][234] recently proposed the encapsulation of imidazole to afford latent curing systems. They observed shelf-life of more than 30 days at 20°C compared to 1 hour to 1 day for the free imidazole system [232].…”

Section: Thermogenerated Aminesmentioning

confidence: 99%

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Control of reactions and network structures of epoxy thermosets

Vidil¹,

Tournilhac²,

Musso

et al. 2016

Progress in Polymer Science

312

252

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Recent advances in macromolecular chemistry have revolutionized the way we perceive the synthesis of polymers. Polymerization, to be modern, must be "controlled", which usually means capable of producing macromolecules of well-defined structure. The purpose of this review is to examine how the chemistry of epoxy resins, an almost century-old chemistry, is also involved in this movement. Epoxy resins are characterized by both the flexibility of implementation and the qualities of the polymers obtained. Key materials in health-, mobility-and energy related technologies, these resins are heavily present in high-performance composites, electronic boards, adhesives and coatings. Currently, a large number of resins and hardeners are available on the market or described in the literature and an interesting point is that almost any combination of the two is possible. Common to all these recipes and processes is that a liquid (or soluble) resin at some point becomes insoluble and solid. It is very important to know how to manage this transition, physically known as the gel point, as it is the point after which the shape of the object is irreversibly set. Taking into account the variety of epoxy polymerization processespolyaddition, anionic or cationic polymerization-we detail a number of methods to program the occurrence of the gel point and how this type of control affects the structure of the growing network.

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Section: Thermogenerated Aminesmentioning

confidence: 99%

“…They observed shelf-life of more than 30 days at 20°C compared to 1 hour to 1 day for the free imidazole system [232]. Though elegant, this solution is unsuitable for many applications including the manufacture of pre-impregnated fiber composite materials.…”

Section: Thermogenerated Aminesmentioning

confidence: 99%

Control of reactions and network structures of epoxy thermosets

Vidil¹,

Tournilhac²,

Musso

et al. 2016

Progress in Polymer Science

312

252

View full text Add to dashboard Cite

show abstract

“…The superior mechanical and chemical properties of epoxy resins have close relationship with their curing processes, in which the resin with low molecular weight is transformed into polymer with infinite molecular weight and three-dimensional network structure [7][8][9][10][11][12][13]. This curing process can be carried out by using a wide range of curing agents, such as amines, anhydrides, polyamides, phenol formaldehyde resins, and polysulfides [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…At room temperature, the epoxy resin changes into polymer after being mixed with the imidazole curing agent for a period ranging from 1 h to 1 day, so imidazole is an active rather than latent curing agent for epoxy resin systems [24,25]. However, in many application conditions such as electronic equipments and healing of composites, the epoxy resin and the curing agent are required to not react with each other at room temperature but react speedily at a given condition such as a much higher temperature [7,21,26]. Thus, the active property of imidazole at room temperature results in some difficulties in many engineering applications.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Lee et al [30] and Shin et al [21] have prepared the microcapsule of 2-methylimidazole curing agent using polycaprolactone as the shell material by the spray-drying method. Ham et al [7] also adopted polycaprolactone as the shell material and obtained the microcapsule of 2-phenylimidazole curing agent by solvent evaporation method.…”

Section: Introductionmentioning

confidence: 99%

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