Curing of acrylic anaerobic adhesives in the presence of activators

Aronovich, D. A.; Murokh, A. F.; Khamidulova, Z. S.; Sineokov, A. P.

doi:10.1134/s199542120902004x

Cited by 2 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Anaerobic adhesives are one-part systems, curing anaerobically through a redox radical polymerization, , consisting of a monomer, an initiator, an accelerator, a thickening agent, inhibitor, and the stabilizer . The monomer-initiator set imposes the greatest impact on the polymerization process and overall properties. − Common accelerators, that is, N , N , N ′, N ′-tetramethylethylenediamine (TMEDA) (for redox vinyl polymerizations) and amidosulfonic acid (ASA) are used during the formulation of anaerobic adhesives. , Fitting, locking, sealing, retaining, and bonding are the most common industrial applications of the anaerobic adhesives . The nature of the substrate, application conditions, applying temperature, and the presence of oxygen are the most influential factors regarding the curing of anaerobic adhesives …”

Section: Introductionmentioning

confidence: 99%

“…Redox curing systems, comprising an initiator (i.e., organic peroxides) and an activator (i.e., sulfur and nitrogen compounds), have been studied in details. − Other affecting factors on the performance of the adhesive, include the nature of substrates, application conditions, the applying temperature, oxygen content, and so forth . The substrate type contributes to the initiation of an anaerobic reaction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Engineered Green Adhesives Based on Demands: Star-Shaped Glycerol–Lactic Acid Oligomers in Anaerobic Adhesives

Moini

Khaghanipour

Kabiri

et al. 2019

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Solvent-resistant, biobased anaerobic adhesives have been engineered, employing star-shaped glycerol-lactic acid oligomers (SLAOs). For optimization of the performance, first, the best combination set of the comonomer and accelerators were achieved (i.e., amidosulfunic acid and methylmethacrylate); second, the effect of the arm length of SLAO on the adhesive properties was evaluated; and; finally, the impacts of SLAO content on the performance of the adhesives were assessed. Adhesives containing oligomers with 4 and 6 lactic units showed maximum adhesion; and the best performance was achieved on the steel substrates. The adhesives were evaluated by differential scanning calorimetry, thermogravimetric analyses, rotational viscometer, single lap shear (LSS), and breakaway torque tests. Heat of the curing reaction, a function of arm lengths of the employed SLAOs, reduced from 238 J•g −1 for oligomers with two lactic units, to 74 J• g −1 for oligomers with ten lactic units. In an attempt to reduce the nonrenewable portion of the adhesives, up to 95 wt % of the adhesives was substituted by SLAO. These green adhesives present tunable viscosities (in the range of 20−510 cP), along with promising thermal−mechanical properties (LSS: 8.62 MPa, T deg : 370 °C); moreover, they outperformed in various aspects, including providing a higher breakaway torque strength (∼7−27 N•m), better solvent resistance, and lower environmental impacts.

show abstract