Properties and application of rubber-based sealants

Syao, Ouyan; Malysheva, G. V.

doi:10.1134/s1995421214030150

Cited by 28 publications

(8 citation statements)

References 4 publications

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“…They cover a broad range of physicochemical properties, such as high refractivity, heat resistance, heavy metal chelating properties or enhanced dielectrical properties. 1 Therefore, they find applications in a wide range of industrial fields [2][3][4] ranging from commonly-used adhesives and sealing agents, [5][6][7] to high tech products, such as optical devices (high refractive index polymers), 8 or self-healing materials. 9,10 In the field of energy storage, polythioethers, especially poly(ethylene sulfide), have a high potential as solid-state electrolytes to replace poly(ethylene oxide) in lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

“…They cover a broad range of physicochemical properties, such as high refractivity, heat resistance, heavy metal chelation properties, or enhanced dielectric properties . Therefore, they find applications in a wide range of industrial fields − ranging from commonly used adhesives and sealing agents − to high-tech products, such as optical devices [high-refractive index (RI) polymers], or self-healing materials. , In the field of energy storage, polythioethers, especially poly(ethylene sulfide), have a high potential as solid-state electrolytes to replace poly(ethylene oxide) in lithium-ion batteries . In addition, polysulfides are commonly used as oxidation-responsive or antioxidant materials for biomedical applications due to their unique well-controlled oxidation responsive behavior up to now. ,− For example, PPS nanoparticles or polyethylene glycol (PEG)–PPS vesicles can be used for oxidation-driven drug release due to the ability of the hydrophobic PPS to be oxidized via chemical or enzymatic oxidation to hydrophilic polysulfoxides and/or polysulfones. , In addition, PEG–PPS copolymers were also used to prepare protein repellent layers on implants using the metal affinity of the thioether group …”

Section: Introductionmentioning

confidence: 99%

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Episulfide Anionic Ring-Opening Polymerization Initiated by Alcohols and Primary Amines in the Presence of γ-Thiolactones

2022

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Among the sulfur-containing polymers, polythioethers remains very attractive structures due to their high sulfur atom content, making them interesting candidates for various industrial applications, for example in the fields of energy storage or biomedical applications.Although anionic ring-opening polymerization of episulfides is known since decades, only a limited number of efficient initiating systems enable the synthesis of well-defined polymer chains. In this work, a one-pot, two step method was developed in order to efficiently initiate the anionic ring-opening polymerization of propylene sulfide with alcohol or amine moieties using the latent thiol functionality of γ-thiolactones. First, the ring-opening of γ-thiolactones by alcohols or amines was investigated in the presence of various bases (BEMP, DBU, DMAP, tBuP 1 and tBuP 4 ). Then, the polymerization conditions were optimized allowing the synthesis of well-defined α,ω-heterotelechelic poly(propylene sulfide)s with controlled molar mass up to 10 kg.mol -1 as evidenced by SEC, 1 H, 13 C, and 2D NMR and MALDI-TOF mass spectrometry. Depending on the initiating function (alcohol or amine), the initiator and the polythioether chains are connected either by an ester or by an amide bond. The stability of these bonds was studied under basic conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Episulfide Anionic Ring-Opening Polymerization Initiated by Alcohols and Primary Amines in the Presence of γ-Thiolactones

2022

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“…Unlike natural rubber, polysulfide polymers are not processable in rubber mills. Polysulfides show low thermal stability, and in the industry, they are commonly referred to by the brand name Thiokol, which its liquid form has the most application among polysulfides [ 12 ]. Approximately 94% of LPS are used as sealants, and about 75% of these sealants are used in doors and windows sealants in the construction industry [ 8 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling and Degradation Study of Liquid Polysulfide Resin-Clay Nanocomposite

et al. 2021

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Kinetic modeling and degradation study of liquid polysulfide (LPS)/clay nanocomposite is possible through Ozawa–Flynn–Wall (OFW) and Kissinger methods. Comparing the results of these models with experimental data leads to provide an accurate degradation kinetic evaluation of these materials. To this aim, the morphology and distribution of clay nanoparticles (CNPs) within the LPS matrix were investigated using Field Emission Scanning Electron Microscopy (FESEM) and X-ray diffraction (XRD). To evaluate the interaction between the LPS and the CNPs, the Fourier transform infrared (FTIR) identification was utilized. Furthermore, to investigate the kinetics of degradation, the thermal gravimetric analysis (TGA) and derivative thermogravimetry (DTG) of the samples were used in the nitrogen atmosphere with the help of Kissinger and Ozawa–Flynn–Wall (OFW) models. The characterization results confirmed the homogenous dispersion of the CNPs into the LPS matrix. In addition, the presence of CNPs increased the thermal stability and activation energy (Ea) of the samples at different conversion rates. Moreover, the OFW method was highly consistent with the experimental data and provided an appropriate fit for the degradation kinetics.

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“…Addition-curable silicone gel has a wide range of applications in encapsulating power electronics modules and replacing insulating oil in oil-filled cables. [22][23][24] The silicone gel has numerous advantages, including excellent flow, low volatile organic compound (VOC) content, rapid low-temperature cure, and so forth. Moreover, its attractive features include unexpectedly superior tack with silicone rubber, excellent thermal stability, and good dielectric performances.…”

Section: Introductionmentioning

confidence: 99%

Insulating polysiloxane coating forXLPE‐Si‐rubber interfaces with high long‐term stability

et al. 2020

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Cable joints play an important role in the power supply systems, but at the same time, they greatly contribute to the majority of direct failures. Weak parts of the cable lines, especially for the solid‐solid interfaces in joints, attract much attention and are investigated by researchers worldwide. High‐voltage power transmission in electrical grids requires reliable and durable dielectric coatings for the interface insulation. The breakdown caused by local electric field enhancement is a gradual damaging process that leads to structural degradation and an increase of electrical conduction of dielectric materials, and ultimately, it results in catastrophic failure of the cable joints. Here, we demonstrate that the coating of silicone gel instead of silicone grease enables the improvements of tangential AC (alternating current) BDS (breakdown strength) and long‐term stability in the interfaces of joints. Under the pressure of Si‐rubber (silicone rubber) cold‐shrinkable cable accessories, the silicone gel almost did not lose, which improved the insulating stability of the interfaces. Our method allows us to fill the XLPE‐Si‐rubber (cross‐linked polyethylene and silicone rubber interfaces with silicone gel instead of silicone grease), which could reduce the risks of the power outage caused by cable joint faults.

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Properties and application of rubber-based sealants

Cited by 28 publications

References 4 publications

Episulfide Anionic Ring-Opening Polymerization Initiated by Alcohols and Primary Amines in the Presence of γ-Thiolactones

Episulfide Anionic Ring-Opening Polymerization Initiated by Alcohols and Primary Amines in the Presence of γ-Thiolactones

Kinetic Modeling and Degradation Study of Liquid Polysulfide Resin-Clay Nanocomposite

Insulating polysiloxane coating forXLPE‐Si‐rubber interfaces with high long‐term stability

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