Thermal properties and fracture toughness of epoxy resins cured by phosphonium and pyrazinium salts as latent cationic initiators

Park, Soo‐Jin; Heo, Gun‐Young; Suh, Dong Hack

doi:10.1002/pola.10777

Cited by 29 publications

(17 citation statements)

References 28 publications

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“…Instead, they promote transfers and decrease the overall rate of the polymerization. It is worth noting that alcohols and water could also accelerate the curing rate as the role they play is very dependent on the structure of both the monomers [107,108] and the initiator [109]. This will be further discussed in Section 4.2.…”

Section: Page 12 Of 163mentioning

confidence: 97%

Control of reactions and network structures of epoxy thermosets

Vidil¹,

Tournilhac²,

Musso

et al. 2016

Progress in Polymer Science

314

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: Page 12 Of 163mentioning

confidence: 97%

Control of reactions and network structures of epoxy thermosets

Vidil¹,

Tournilhac²,

Musso

et al. 2016

Progress in Polymer Science

314

252

View full text Add to dashboard Cite

show abstract

“…For use on a large variety of polar solids, it is needed to have at least two-unidentical liquids to calculate the polar surface energy, if the values of γ L L and W SP L are known, such as water, diiodomethane, ethylene glycol and glycerol (Park, 1999;Wu, 1982;Park et al, 2003). However, recent studies (Fabretto et al, 2004;Landry et al, 1996;Elmoursi and Patel, 2004) have shown that using two liquids according to geometric mean gives a significant variety of unsatisfactorily energetic results when the testing liquids were varied in a composition of two liquids such as water-diiodomethane, water-ethylene glycol, diiodomethane-ethylene glycol and, etc.…”

Section: Surface Properties and Adhesion Strengthsmentioning

confidence: 99%

A study on physicochemical properties of epoxy coating system for nuclear power plants

Lee

Park

Seo

et al. 2006

Nuclear Engineering and Design

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“…Therefore, in this study, the Coats-Redfern equation derived from the integral method is used to determine the decomposition activation energy (E d ) as follows: 15,16 (…”

Section: Conversionmentioning

confidence: 99%

Effect of substituted trifluoromethyl groups on thermal and mechanical properties of fluorine-containing epoxy resin

Heo

Park

2009

Macromol. Res.

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In this study, 2-diglycidylether of benzotrifluoride (2-DGEBTF) and 4-diglycidylether of benzotrifluoride (4-DGEBTF) epoxy resins, which contained fluorine groups in the main chain, were synthesized. The resins were characterized by FTIR, 1 H NMR, 1 3 C NMR and 1 9F NMR spectroscopy. The 2-DGEBTF and 4-DGEBTF epoxy resins were cured with triethylene tetramine (TETA), and the effect of the fluorine group on the synthesized epoxy resin on the cure behavior, thermal, and mechanical properties was investigated. The 2-DGEBTF/TETA system was more reactive than the 4-DGEBTF/TETA system, whereas the thermal stability factor i.e., the decomposition activation energy (E d ), of 4-DGEBTF/TETA was higher than that of 2-DGEBTF/TETA. These results can be explained by the decrease in cross-linking density and decomposition of the short side chains, resulting in the CF 3 group at the para position. However, the K I C value of 4-DGEBTF/TETA was higher than that of 2-DGEBTF/TETA. This was attributed to the increase in flexibility in the epoxy backbone, resulting in a difference in steric hindrance and polarlizability.

show abstract

Thermal properties and fracture toughness of epoxy resins cured by phosphonium and pyrazinium salts as latent cationic initiators

Cited by 29 publications

References 28 publications

Control of reactions and network structures of epoxy thermosets

Control of reactions and network structures of epoxy thermosets

A study on physicochemical properties of epoxy coating system for nuclear power plants

Effect of substituted trifluoromethyl groups on thermal and mechanical properties of fluorine-containing epoxy resin

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