Ceramifiable and mechanical properties of silicone rubber foam composite with frit and high silica glass fiber

Song, Jianrong; Zhang, Huang; Qin, Yan; Yang, Guangyuan; Wang, Xuanran

doi:10.1088/1757-899x/423/1/012168

Cited by 13 publications

(10 citation statements)

References 14 publications

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“…During regular usage, they are characterized by properties similar to conventional elastomer composites, whereas in the case of fire they are transformed into an insulating ceramic layer of a specific porosity and mechanical durability, which ensures the integrity of the electrical circuits for a minimum period of 120 min from the point at which flame appears. Although ceramizable materials may be obtained through the application of various polymers, e.g., EVA [1,2,3], PE [4], SBR [5,6], NBR [7], EPDM [8,9] etc., silicone rubber is considered to be the optimal precursor [10,11] due to the high energy value of the Si-O bond in the backbone chain.…”

Section: Introductionmentioning

confidence: 99%

Impact of Basalt Filler on Thermal and Mechanical Properties, as Well as Fire Hazard, of Silicone Rubber Composites, Including Ceramizable Composites

et al. 2019

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This article illustrates the impact of basalt filler, both in the form of basalt flakes and basalt fibers, on thermal and mechanical properties, as well as on the fire hazard, of silicone rubber (SR) composites, including ceramizable composites. In addition to basalt filler, ceramizable composites contain mineral fillers in their composition in the form of silica and calcium carbonate, inorganic fluxes such as zinc borate and glass frit, and melamine cyanurate as a flame retardant. The obtained composites were analyzed from the point of view of their morphology, rheological and thermal properties, flammability, and mechanical properties before and after the ceramization process. The obtained research results indicate that the basalt filler has an unambiguous impact on the improvement of thermal properties and the reduction of flammability in the analyzed composites. The results of morphological analyses of ceramizable composites before and after the process of their ceramization indicate a definite impact of the basalt filler on the structure of the formed ceramic layer. An increase in its homogeneity exerts a direct impact on the improvement of its mechanical parameters.

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Section: Introductionmentioning

confidence: 99%

Impact of Basalt Filler on Thermal and Mechanical Properties, as Well as Fire Hazard, of Silicone Rubber Composites, Including Ceramizable Composites

et al. 2019

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“…It was observed that their tensile stresses increased with an increase of irradiation doses at 40–120 kGy, and then decreased at 160 kGy due to the slight degradation of silicone rubber's chains. Meanwhile, there was a drop in their elongations at break, which was a common phenomenon for the most crosslinked polymers 32 . The results clearly approved that these EB irradiated composites had enough strength and flexibility for their further applications in wires and cables.…”

Section: Resultsmentioning

confidence: 60%

“…Meanwhile, there was a drop in their elongations at break, which was a common phenomenon for the most crosslinked polymers. 32 The results clearly approved that these EB irradiated composites had enough strength and flexibility for their further applications in wires and cables.…”

Section: Thermal Stability and Mechanical Properties Of The Compositesmentioning

confidence: 67%

Electron‐beam irradiated ceramizable‐silicone‐rubber‐composites containing allyl‐functionalized cyclophosphazene

Wang

Leng²,

Shan

et al. 2022

J of Applied Polymer Sci

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In the current study, the ceramifiable-silicone-rubber-composites (CSRs) containing allyl-functionalized cyclophosphazene (CP-Allyl) were prepared for studying as novel fire-resistant insulating materials. Electron-beam (EB) irradiation was applied to obtain the cross-linked networks, and the gel content of 98.8% could be achieved at an irradiation dose of 120 kGy. The thermal, mechanical, flame retardancy and insulation properties were well investigated, and it was found that the involvement of CP-Allyl could have a great influence on the properties. The tensile stress of the EB-irradiated CP-Allyl containing composite reached 5.2 MPa, and its limiting oxygen index was up to 32.4%. After ablation at 700-1000 C, it was observed that the shapes of the CSR samples could be well maintained, and the hard and integrated ceramic phases were formed. All the studies indicate that these CSRs may be the promising insulating materials for wires and cables.

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“…Similar improvements in the char strength by the addition of fluxing agents has been reported in other studies. [32][33][34] Nonetheless, it should be noted that improving the strength of char might not be a direct indication of the improvement in fire performance of a coating on a steel member in a structural-scale fire test. It is important to delineate and distinguish the parameters that are critical for the specified application.…”

Section: Introductionmentioning

confidence: 99%

Acrylic‐based fire‐retardant coatings for steel protection: Employing the concept of in situ ceramization

Anees

Dasari

2020

J of Applied Polymer Sci

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Traditional intumescent coatings are widely used as passive fire‐protective coatings for steel structures as they are capable of expanding in the range of 20–50 times the original thickness thereby providing excellent insulation. However, the fragile nature of such residue and susceptibility to thermo‐oxidation given their carbonaceous nature are key problematic issues. The concept of in situ ceramization is explored in this work as a means to form inorganic cohesive char with improved rigidity and thermo‐oxidative stability. Coating samples were prepared by incorporating ammonium polyphosphate, talc, Mg(OH)2, and polydimethylsiloxane as additives into acrylic resin at different weight fractions. Thermal analysis and x‐ray diffraction have confirmed the reactions between the additives to form various crystalline magnesium phosphate phases, and to a small extent, silicon phosphate, thereby ensuring the thermo‐oxidative stability of the residue. This is reiterated by the fire performance tests (by exposing the coatings to a temperature profile in a furnace similar to ISO 834 fire curve). Despite the advantages of rigid char and its thermo‐oxidative stability as a result of formation of inorganic phosphates, the lack of swelling has resulted in relatively poor insulation capabilities of the char, and subsequently, compromised the fire protection times (that are in the range of 45–55 min). However, pyrolysis flow combustion calorimeter results of the coatings are promising and have shown a significant drop of up to 70% in the peak of heat release rate values as compared to neat resin.

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Ceramifiable and mechanical properties of silicone rubber foam composite with frit and high silica glass fiber

Cited by 13 publications

References 14 publications

Impact of Basalt Filler on Thermal and Mechanical Properties, as Well as Fire Hazard, of Silicone Rubber Composites, Including Ceramizable Composites

Impact of Basalt Filler on Thermal and Mechanical Properties, as Well as Fire Hazard, of Silicone Rubber Composites, Including Ceramizable Composites

Electron‐beam irradiated ceramizable‐silicone‐rubber‐composites containing allyl‐functionalized cyclophosphazene

Acrylic‐based fire‐retardant coatings for steel protection: Employing the concept of in situ ceramization

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