Regulation of properties of epoxy-thiokol glue compositions

Kochergin, Yu. S.; Grigorenko, M. A.; Григоренко, Т. И.; Loyko, D. P.

doi:10.1134/s1995421213010085

Cited by 8 publications

(2 citation statements)

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“…7,8 Unfortunately, the extremely poor mechanical properties difficultly withstood the loads from wing or tanks, causing oil spills in practical applications. 9 Although the polysulfide adhesives system can be modified for high performance by doping fillers, 10,11 such as commercial carbon black and silicon dioxide, 12 surface pretreatment of carbon nanotubes (CNTs), 13 and graphene oxide (Go)-grafted smart polymers or functionalized Go 9,14 into the formulation. However, these fillers are usually unevenly dispersed and tend to aggregate in the polymer matrix, resulting in structural and functional defects in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Strengthening the mechanical properties of polysulfide adhesives by introducing polyurethane

Han,

Li,

et al. 2023

J of Applied Polymer Sci

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Polysulfide adhesives are often subjected to breakage or even fracture caused by highly loaded vibrations and large deformations from the wing, limiting their practical use in aircraft fuel tanks. Inserting polyurethanes into liquid polysulfide systems is a viable approach to strengthening their mechanical properties and avoiding nonuniform dispersion of the curing agent. In this contribution, a series of sulfur‐containing curing agents were prepared by liquid polysulfide and trimethylolpropane tris(3‐mercapto propionate) (TMPMP) to minimize the effect of the polysulfide‐urea (‐NHCOS‐) groups on water resistance. Subsequently, the two‐component polysulfide adhesives were successfully synthesized via the prepolymerization method, and their chemical structure, mechanical properties, and solvent resistance were systematically evaluated. As expected, the large introduction of sulfur linkages and ‐NHCOS‐ groups provided excellent oil resistance and strong mechanical properties for polysulfide adhesives. Notably, Samples 2‐4 exhibited the highest tensile strength of 1.11 ± 0.02 MPa, the greatest shear strength of 1.87 ± 0.04 MPa, and the best hardness of 81 ± 2 Shore A, with 122.0%, 523.3%, and 170.0% improvement over the control, respectively. Furthermore, the oil absorption rate of all samples was less than 3.0%, and their tensile strength remained almost unchanged after 30 days of immersion than before. We believe our paradigm can provide a valuable guideline for designing high‐performance polysulfide adhesives.

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Section: Introductionmentioning

confidence: 99%

Strengthening the mechanical properties of polysulfide adhesives by introducing polyurethane

Han,

Li,

et al. 2023

J of Applied Polymer Sci

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“…It has also been established [2,3] that the TERP properties can be very effectively adjusted by changing the molecular weight of the epoxy resin and the amount of the introduced hard ener or by administering active diluent. In a continua tion of this research, in this paper we studied the effect of plasticizers on adhesive and cohesive properties of epoxy-thiokol composite materials based on TERP products.…”

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confidence: 99%

The effect of plasticizers on properties of epoxy-thiokol adhesive compositions

Kochergin¹,

Григоренко²

2014

Polym. Sci. Ser. D

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This paper studies the influence of plasticizers of different chemical nature on the adhesive, strain strength, and dynamic mechanical properties of an adhesive composition based on a product of a thioether ification prereaction of epoxy resin with liquid thiokol. It is shown that the introduction of plasticizers into the composition increases the adhesive and cohesive strength, tensile strain, and fracture energy of the mate rial. The use of oligoetheracrylate MGF 9 as a plasticizer allows the greatest effect to be achieved.

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Synthesis and characterization of bis(oxiranylmethyl)sulfanes as new epoxide‐terminated polysulfide prepolymers and their use in synthesis of new amine‐cured polysulfide polymers

et al. 2018

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The main disadvantages of polysulfide polymers are their complicated curing systems and their low solubility in different solvents. To overcome these problems, bis(oxiranylmethyl)sulfanes as new epoxide‐terminated polysulfide prepolymers were synthesized and their amine‐cured polymers were examined by different analysis methods. 1H NMR, 13C NMR, and FT‐IR have been used to characterize structure of the synthesized prepolymers and polymers and sulfur content of all samples has been investigated by CHNS elemental analysis. X‐ray diffraction analysis showed that all samples were semi‐crystalline and differential scanning calorimetry was used to study thermal transitions of prepolymers and polymers. As an advantage, all prepolymers and linear polymers were dissolved in sulfur‐ and nitrogen‐containing solvents. Synthesized polymers had low thermal stability with one‐step degradation process and they were in rubbery state with Tg values lower than 0°C. Conclusively, thermophysical properties of polymers depended on utilized prepolymer and amine‐containing compounds as precursors.

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Regulation of properties of epoxy-thiokol glue compositions

Cited by 8 publications

References 1 publication

Strengthening the mechanical properties of polysulfide adhesives by introducing polyurethane

Strengthening the mechanical properties of polysulfide adhesives by introducing polyurethane

The effect of plasticizers on properties of epoxy-thiokol adhesive compositions

Synthesis and characterization of bis(oxiranylmethyl)sulfanes as new epoxide‐terminated polysulfide prepolymers and their use in synthesis of new amine‐cured polysulfide polymers

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