Sealants based on polysulfide elastomers

Zaitseva, E. I.; Donskoi, A. A.

doi:10.1134/s1995421208040163

Cited by 7 publications

(4 citation statements)

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“…In this work, by analyzing all the curves, other main parameters are kept at a mean value and constant. Oxidative vulcanizing agents MnO 2 , Na 2 Cr 2 O 7 , and PbO 2 15 along with carbon black increases elastic properties of the samples. On the other hand, according to physical and mechanical properties of the polymers,16 the relation between TS and EB variations are opposite to each other.…”

Section: Resultsmentioning

confidence: 96%

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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Section: Resultsmentioning

confidence: 96%

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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“…1,2 Liquid thiol-terminated polysulfide oligomers are the base materials for the preparation of polysulfide sealants. 3,4 The vulcanization of polysulfide oligomers is based on the oxidation of highly reactive terminal SH groups with curing agents at room temperature, including inorganic peroxides or dioxides, chromates, and organic oxidants. Both the structure of polysulfide oligomers and the activity of the curing agent can influence the properties of polysulfide rubbers.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Due to the chemical stability, high adhesion, excellent elasticity at high or low temperatures, low water-vapor permeability, as well as environmental degradation, polysulfide sealants have been widely used in aeronautical and space industries, building, double glazing, highway joints, swimming pools, and so on. , Liquid thiol-terminated polysulfide oligomers are the base materials for the preparation of polysulfide sealants. , The vulcanization of polysulfide oligomers is based on the oxidation of highly reactive terminal SH groups with curing agents at room temperature, including inorganic peroxides or dioxides, chromates, and organic oxidants. Both the structure of polysulfide oligomers and the activity of the curing agent can influence the properties of polysulfide rubbers.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Disulfide Bond Coupling by Surface-Reduced Manganese Oxide for Controlled Polysulfide-Based Polymer Synthesis

Chen

Bai

et al. 2023

ACS Sustainable Chem. Eng.

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Manganese oxide (MnO 2 ) is a commonly used vulcanizing agent, which can convert polysulfide oligomers with reactive terminal mercaptans into polymeric networks. Herein, an elegant approach for the fast and facile curing behavior of polysulfide rubbers was disclosed under visible-light irradiation. Photocatalytic disulfide bond coupling of mercaptan end groups can be achieved on MnO 2 in the presence of visible-light irradiation. More importantly, compared with pristine MnO 2 , surface-reduced MnO 2 (R-MnO 2 ) with abundant Mn 3+ sites and oxygen vacancies exhibited superior vulcanizing performance. Theoretical simulation uncovers that R-MnO 2 can facilitate electron transfer due to a narrowed energy band gap and reduce the energy barriers required for photocatalytic disulfide bond formation. This work opens up the potential of using visible light together with surface modification to tune the vulcanizing process and the properties of polysulfide rubbers.

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“…On the other hand, polysulphide are widely used as flexible sealants for joints, building, sewage pipes and road surfacing [15,16], also polysulphide show a number of remarkable properties like rapid curing at ambient temperature, good adhesion on many materials high impact resistance and chemically resistance to a number of dilute acids, alkalies and organic solvents.…”

Section: Introductmentioning

confidence: 99%

Tensile strength and dynamic mechanical analysis of new IPNs based on epoxy resin-polysulphide elastomer

Hanoosh

Saleh

2016

Eur. J. Chem.

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Sealants based on polysulfide elastomers

Cited by 7 publications

References 0 publications

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

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

Photocatalytic Disulfide Bond Coupling by Surface-Reduced Manganese Oxide for Controlled Polysulfide-Based Polymer Synthesis

Tensile strength and dynamic mechanical analysis of new IPNs based on epoxy resin-polysulphide elastomer

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