lonic liquids as conyenient latent hardeners of epoxy resins

Kowalczyk, Krzysztof; Spychaj, Tadeusz

doi:10.14314/polimery.2003.833

Cited by 71 publications

(85 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The use of imidazolium-based ILs as thermally latent initiators for the polymerization of epoxy systems was also reported by Kowalczyk and Spychaj [20] and by Rahmathullah et al [21] The first authors employed 1-butyl-3-methylimidazolium tetrafluoroborate and observed that the presence of 5 phr of IL resulted in a curing process which starts at about 235 8C. [20] On the other hand, Rahmathullah et al employed imidazolium-based salt with dicyanamide as the anion and claimed that the cure process might occur via reaction between the epoxy group and cyanamide.…”

Section: Introductionmentioning

confidence: 60%

“…Some other important changes in the spectra at higher temperatures can be observed, such as: the increase in intensity of the double peak at 2350-2360 cm À1 (peak e). These bands also appeared in the pure IL spectrum when it was heated at the same temperatures, and may be assigned to the stretching vibrations related to the N þ H ion, [20] which is formed during the degradation process. Moreover some changes in the spectra in the region between 1000-1100 cm À1 (peak c) were observed, which may be attributed to the etherification reaction promoted by the imidazolium group as illustrated in Figure 6.…”

Section: Il Content [Phr]mentioning

confidence: 93%

“…[20] On the other hand, Rahmathullah et al employed imidazolium-based salt with dicyanamide as the anion and claimed that the cure process might occur via reaction between the epoxy group and cyanamide. [21] The versatility of ILs in designing different properties of polymeric materials, the important and potential applications that can be achieved with them, and the few researches involving these compounds in epoxy systems, led us to develop some new studies on this subject.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and Characterization of Epoxy/MCDEA Networks Modified with Imidazolium‐Based Ionic Liquids

Soares

Livi

Duchet‐Rumeau

et al. 2011

Macro Materials & Eng

View full text Add to dashboard Cite

International audienceEpoxy-networked materials containing N,N'-dioctadecylimidazolium iodide are prepared by curing a mixture of DGEBA and different ratios of the ionic liquid with MCDEA at high temperature. The presence of ionic liquid results in an increase of the storage modulus and a decrease of the glass transition temperature, as indicated by DMA. Also, the onset curing temperature decreases as the amount of IL increase indicating that IL also takes part on the curing process. DSC and FTIR analyses confirm that the imidazolium-based ionic liquid is able to promote the crosslink of the epoxy pre-polymer without the presence of external curing agent

show abstract

Section: Introductionmentioning

confidence: 60%

Section: Il Content [Phr]mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Characterization of Epoxy/MCDEA Networks Modified with Imidazolium‐Based Ionic Liquids

Soares

Livi

Duchet‐Rumeau

et al. 2011

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…A great attention has also been focused on polymer-ILs interactions [15][16][17][18][19][20][21][22][23]. The use of ILs as solvents in polymerization processes has promoted research on their influence on the final products properties.…”

Section: Introductionmentioning

confidence: 99%

“…The use of ILs as solvents in polymerization processes has promoted research on their influence on the final products properties. It has being found that ILs can act as convenient non-volatile plastizicers when added to thermoplastics such as polymethylmethacrylate (PMMA) or polyvinylchloride (PVC) [15,16] while having a hardening effect on epoxy thermosets [17,24].…”

Section: Introductionmentioning

confidence: 99%

Ionic liquids as lubricants of polystyrene and polyamide 6-steel contacts. Preparation and properties of new polymer-ionic liquid dispersions

et al. 2006

View full text Add to dashboard Cite

Room-temperature ionic liquids (ILs) have been used as external lubricants in polystyrene (PS) and polyamide 6 (PA6)-steel contacts and as internal lubricants in new polymer-IL dispersions. 1)C n H 2n+1 )3)CH 3 -imidazolium X ) [X=BF 4 ; n=2 (IL1), 6 (IL2), 8 (IL3). X=PF 6 ; n=6 (IL4). X=CF 3 SO 3 ; n=2 (IL5). X=(4)CH 3 C 6 H 4 SO 3 ); n=2 (IL6)] ionic liquids give low friction and extremely mild wear in PS/AISI 316L stainless steel contacts, independently of IL composition. For AISI 52100 steel pins a tribocorrosion reaction produces FeF 2 and increases friction. PS+IL1 (1; 1.35; 3 wt.% IL1) dispersions show lower dry friction and wear against AISI 52100 as IL1 proportion increases, but the lowest friction, with a one order of magnitude reduction with respect to PS, is reached for PS+1%IL1 once the skin layer has been worn out. Increasing IL1 content to 10 wt.% produces an heterogeneous material with non-uniform IL distribution. IL4 reduces friction and wear in PA6+3%IL4 dispersions against AISI 316L, although the lowest values are obtained with IL4 as external lubricant. The cryofracture surfaces of the polymers have been examined and the thermal stability of the polymers in the presence of ILs has been determined.

show abstract

New Epoxy/Jeffamine networks modified with ionic liquids

Soares

Silva

Livi

et al. 2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

International audienceDiglycidyl ether of Bisphenol A/Jeffamine D400 system was modified with 2.5 and 5.0 phr of ionic liquids based on imidazolium and phosphonium cations denoted N,N ′-dioctadecyl-imidazolium iodide, or octadecyl-triphenylphosphonium iodide, [OdTPP][I], aiming to develop new networked materials with enhanced performance particularly in terms of mechanical properties and conductivity. The curing behavior was investigated by differential scanning calorimetry, suggesting that the presence of ionic liquids (ILs) accelerates the curing process of the epoxy system. Then, the networked materials were analyzed by dynamic mechanical analysis, and mechanical testing. The presence of the ILs did not affect the glass transition temperature but resulted in a decrease on the storage modulus. By transmission electron microscopy, we have highlighted that the ILs are not miscible inside the epoxy matrix. In fact, a phase separation in nanometric scale has been observed. Measurements of conductivity revealed that the system modified with [OdTPP][I] presented higher dielectric constant and higher electrical conductivity

show abstract

lonic liquids as conyenient latent hardeners of epoxy resins

Cited by 71 publications

References 0 publications

Synthesis and Characterization of Epoxy/MCDEA Networks Modified with Imidazolium‐Based Ionic Liquids

Synthesis and Characterization of Epoxy/MCDEA Networks Modified with Imidazolium‐Based Ionic Liquids

Ionic liquids as lubricants of polystyrene and polyamide 6-steel contacts. Preparation and properties of new polymer-ionic liquid dispersions

New Epoxy/Jeffamine networks modified with ionic liquids

Contact Info

Product

Resources

About