An efficient flame retardant for silicone rubber: Preparation and application

Zhu, Chen; Deng, Cong; Cao, Jingyu; Wang, Yu‐Zhong

doi:10.1016/j.polymdegradstab.2015.08.008

Cited by 48 publications

(16 citation statements)

References 37 publications

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“…By comparing the addition of EG and HPCTP, EG was conducive to improving the LOI and UL-94 levels. This was similar to the research results by Shen, Chen, et al [28,30,32], and phosphazene flame retardants have limited contributions to LOI and UL-94. To further verify whether EG and HPCTP have a synergistic effect, the flame retardancy of different ratios of EG/HPCTP (15 wt%) on SiF was studied.…”

Section: Flame Retardancysupporting

confidence: 92%

Effect of expandable Graphite/Hexaphenoxycyclotriphosphazene beads on the flame retardancy of silicone rubber foam

Pang¹,

Deng²,

Kang³

et al. 2020

Mater. Res. Express

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Silicone rubber foam (SiF) with EG/HPCTP was prepared by high-temperature vulcanization. The flame retardancy of SiF was evaluated using the LOI (limiting oxygen index), UL-94, cone calorimetry test (CCT), thermogravimetric analysis (TGA), and mechanical properties. The results showed that EG/HPCTP could improve the LOI of SiF, and the SiF could pass the UL-94 V-0 rating. Compared with pristine SiF, EG/HPCTP could reduce the total heat release rate (THR), heat release rate (PHRR). Digital images of the char residues showed that the HPCTP was beneficial to promote the strength of SiF with EG. TGA showed that the branched decomposition temperature and main chain pyrolysis temperature of SiF were delayed. Mechanical properties analysis showed that EG and HPCTP could improve the mechanical properties of SiF. These indicated that the addition of EG/HPCTP was a good approach to prepare high effective flame-retarding SiF.

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Section: Flame Retardancysupporting

confidence: 92%

Effect of expandable Graphite/Hexaphenoxycyclotriphosphazene beads on the flame retardancy of silicone rubber foam

Pang¹,

Deng²,

Kang³

et al. 2020

Mater. Res. Express

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“…The C1s binding energy of (Pt/BTA)‐0 and (Pt/BTA)‐3 was as shown in Figure 10C,D, 284, 284.8, 286.1, and 289 eV corresponding to CSi, CC, CO, and CO, respectively 27,28 . Peaks of C1s at 284 eV (CSi) and 284.8 (CC) became stronger after adding Pt/BTA, while peaks at 286.1 eV (CO) and 289 eV (CO) became weaker.…”

Section: Resultsmentioning

confidence: 90%

“…Peaks of C1s at 284 eV (CSi) and 284.8 (CC) became stronger after adding Pt/BTA, while peaks at 286.1 eV (CO) and 289 eV (CO) became weaker. This indicated that there were more C atoms existing in the form of CSi and CC with the addition of Pt/BTA, rather than being oxidized to CO and CO, which resulted from dramatic oxidative degradation reaction 28 . More ratios of C‐Si and CC were helpful to the higher‐quality ceramics, which can be the isolation of external oxygen and heat during degradation process, improving flame retardancy and ceramic‐formation property of ceramifiable silicone rubber.…”

Section: Resultsmentioning

confidence: 99%

Effect of benzotriazole‐protected platinum catalyst on flame retardancy and ceramic‐forming property of ceramifiable silicone rubber

Jiang

Zhou

Liao

2020

Polymers for Advanced Techs

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The high-performance ceramifiable silicone rubber was prepared by adding Karstedt's Catalyst which was protected by a complexing agent of benzotriazole, Pt/BTA, to the system of silicone rubber (SR)/aluminum hydroxide (ATH)/ZrSiO 4 /glass dust. In this work, effect of Pt/BTA on flame retardancy and ceramic-forming property of ceramifiable silicone rubber and its mechanisms were investigated. When Pt/BTA content was 1137.75 ppm, Pt/BTA/SR/ATH/ZrSiO 4 passed UL-94V-0 rating and SR/ATH/ZrSiO 4 cannot be rated in the vertical burning test. The total heat release and total smoke production were significantly reduced when Pt/BTA was added. Pt/BTA/SR/ATH/ZrSiO 4 composite can support its own weight when heat-treated at 600 C, 800 C, and 1000 C and three-point flexural strength of ceramics increased to 29.47 MPa, which was 102.68% higher than that of SR/ATH/ZrSiO 4 When Pt/BTA content was 1137.75 ppm. The flame-retardant mechanism is discussed via Thermogravimeter-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy spectra. A three-dimensional network in residues is formed and dramatic depolymerization of polymer backbone can be controlled when Pt/BTA is added in composites. With the addition of Pt/BTA, increased carbon content and formed Si C and C C in residues enhence the quality of char layer, isolating heat and oxygen much more efficiently.

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“…As a type of functional polymer material, silicone rubber (SR) has the advantages of non‐toxic, good compatibility, insulation, high temperature resistance, radiation resistance, and chemical stability. It is widely used in construction, electronic and electrical engineering, mechanical transportation, and other industries 1‐6 . However, SR is flammable and can release a lot of heat and smoke immediately when being ignited, which limits its use to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a novel synergistic flame retardant and its application in silicone rubber composites

Liu

Wang

et al. 2020

Fire and Materials

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Summary Dehydration condensation product (DHCP) was prepared by addition and dehydration condensation reactions of 9,10‐dihydro‐9‐oxa‐10‐phenanthrene‐10‐oxide (DOPO), vinyl trimethoxysilane, and (3‐aminopropyl) triethoxysilane. DHCP‐PA with high phosphorus content was prepared by reaction between DHCP and phytic acid (PA). It was then compounded with oxidized multi‐walled carbon nanotubes (OMWCNTs) to prepare silicone rubber (SR) flame retardant composites. The results showed that the SR with a small amount of DHCP‐PA owned good flame retardant effect. The heat release rate (HRR) was decreased from 436 kW/m2 for pure SR to 288 kW/m2 for the SR with 5 phr DHCP‐PA, and the decreasing degree was 33.9%. After mixing 5 phr DHCP‐PA with 1 phr OMWCNTs, the HRR of SR composite was decreased from 436 to 251 kW/m2, the smoke production rate was decreased from 0.161 to 0.087 m2/s, the limited oxygen index value was increased from 20.4% to 28.4%, and the flame retardant grade can reach UL94 V‐0. In addition, the synergistic flame retardant mechanism was researched and analyzed.

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An efficient flame retardant for silicone rubber: Preparation and application

Cited by 48 publications

References 37 publications

Effect of expandable Graphite/Hexaphenoxycyclotriphosphazene beads on the flame retardancy of silicone rubber foam

Effect of expandable Graphite/Hexaphenoxycyclotriphosphazene beads on the flame retardancy of silicone rubber foam

Effect of benzotriazole‐protected platinum catalyst on flame retardancy and ceramic‐forming property of ceramifiable silicone rubber

Preparation of a novel synergistic flame retardant and its application in silicone rubber composites

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