Water durability of adhesive bonds between glass and polysulfide sealants

Lowe, G.; Lee, T.C.P.; Comyn, J.; Huddersman, Katherine

doi:10.1016/0143-7496(94)90002-7

Cited by 11 publications

(2 citation statements)

References 11 publications

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“…For Sealant B, an estimate of the diffusion coefficient was made, although there was no end to the saturation process for the immersion at room temperature and at 40°C, and the immersion at 50°C was clearly non‐Fickian. The values found were of the order of 10 −14 m 2 /s, which compares well with values reported elsewhere 3, 23. The diffusion coefficient during desorption of Sealant B samples was found to be much higher (of the order of 10 −12 m 2 /s).…”

Section: Results and Discussion On Water And Fuel Exposure Testssupporting

confidence: 90%

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Investigation of the water and fuel exposure characteristics of aircraft fuel tank sealants and the effect on their glass transition temperature

Giannis

Adams

Clark

et al. 2008

J of Applied Polymer Sci

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The water and fuel absorption and desorption characteristics have been studied of aircraft fuel tank sealants. The sealants were an epoxy-cured polythioether and a MnO 2 -cured polysulphide. The effect of the water and fuel exposure on the glass transition temperature was also investigated. Water diffusion was found to be Fickian for the polythioether sealant and the equilibrium plateau level was found not to be dependent on the immersion temperature. On the other hand, the polysulphide sealant demonstrated a clear non-Fickian water uptake characteristic, with large uptake levels, which were attributed to water droplet formation in the volume of the bulk sealant. The glass transition temperature of the polythioether sealant was not affected by the presence of water ($ 4% by weight) while that of the polysulphide was increased by $ 88C for a water uptake level of $ 50% by weight. Fuel absorption followed a very similar trend for both sealants with the weight gain demonstrated an early maximum followed by a subsequent weight decrease, indicating leaching of fuel soluble fractions, until equilibrium was reached. The presence of fuel acted as plasticizer for the sealants; depressing their glass transition temperature by $ 108C. Tests on dried samples have shown that the effect on the glass transition temperature was reversible.

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Section: Results and Discussion On Water And Fuel Exposure Testssupporting

confidence: 90%

“…The values found were of the order of 10 214 m 2 /s, which compares well with values reported elsewhere. 3,23 The diffusion coefficient during desorption of Sealant B samples was found to be much higher (of the order of 10 212 m 2 /s). Diffusion coefficients were also calculated for the case of fuel absorption and desorption.…”

Section: Diffusion Coefficientsmentioning

confidence: 97%

Investigation of the water and fuel exposure characteristics of aircraft fuel tank sealants and the effect on their glass transition temperature

Giannis

Adams

Clark

et al. 2008

J of Applied Polymer Sci

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Optimized formulation of an oxidative curing system for liquid polysulfide sealants used in fuel tanks by D‐optimal design method

Rezaeian

Zahedi

Rezaeian

et al. 2010

J of Applied Polymer Sci

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In this work, the effective parameters in liquid polysulfide curing system were optimized by D-optimal design method. Five main components in the formulation, carbon black, vulcanizing agents (MnO 2 , Na 2 Cr 2 O 7 , and PbO 2 ), CaCO 3 , fumed silica, and chlorinated paraffin, were selected. Mechanical and chemical properties of the samples were investigated. The results showed that tensile strength, hardness, viscosity, and optimum cure time (t 90 ) presented a suitable coordination with reduced quadratic model. For elongation at break and swelling tests, reduced two-factor interaction (2FI), and for peel strength, a linear model showed the best correlation. To achieve the desirable properties for liquid polysulfide sealants used in fuel tanks, an optimized amount of the above components in the formulation were used. Finally, MnO 2 curing system, compared with Na 2 Cr 2 O 7 and PbO 2 , was selected as the best choice.

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Durability of Nonstructural Adhesives

Palmer¹

2017

Handbook of Adhesion Technology

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Water durability of adhesive bonds between glass and polysulfide sealants

Cited by 11 publications

References 11 publications

Investigation of the water and fuel exposure characteristics of aircraft fuel tank sealants and the effect on their glass transition temperature

Investigation of the water and fuel exposure characteristics of aircraft fuel tank sealants and the effect on their glass transition temperature

Optimized formulation of an oxidative curing system for liquid polysulfide sealants used in fuel tanks by D‐optimal design method

Durability of Nonstructural Adhesives

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