Effect and mechanism of hepta-phenyl vinyl polyhedral oligomeric silsesquioxane on the flame retardancy of silicone rubber

Wu, Tongyi; Qiu, Jiedong; Lai, Xuejun; Li, Hongqiang

doi:10.1016/j.polymdegradstab.2018.11.026

Cited by 31 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CCT, one of the most effective bench‐scale methods, is used to simulate real fire scenarios for evaluating the flammability of materials. With using this method, the important fire hazard parameters, including heat release rate (HRR) and THR can be conveniently obtained 1,2,39 . The curves and detailed data for the unaged and aged FRSR were depicted in Figure 8.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Thermal aging properties of flame retardant silicone rubber based on melamine cyanurate

Zhou

Wang

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this work, an efficient preparation method for flame retardant silicon rubbers (FRSR) was established with using melamine cyanurate (MCA) as flame retardants. In order to analyze the thermal aging mechanisms and flame retardancy of FRSR, cone calorimetric test (CCT), Fourier transform infrared (FTIR) spectra, scanning electronic microscopy (SEM), and energy dispersive X-ray spectra were performed. Results indicated that the aging time significantly decreases the tensile strength and the elongation at break. SEM images revealed that the porous surface of the aged FRSR provide diffusion path for heat and oxygen, which resulted in a continuously increase in Shore A hardness due to the increase of cross-linking density during the aging process. FTIR spectra further proved that the MCA is well-embedded into samples and crosslinking reaction between free radicals of silicone rubber (SR) and oxygen was occurring during the aging process. Besides, CCT results showed that all FRSR samples before and after thermal aging exhibit excellent flame retardancy with compact and stable char residue layers, effectively hindering the heat transfer and oxygen diffusion. It was expected that our findings could provide important information to fabricate SR with flame retardancy and outstanding longterm thermal-aging resistance. K E Y W O R D S ageing, degradation, mechanical properties, thermal properties 1 | INTRODUCTION Compared with general organic rubbers, silicone rubber (SR) shows excellent temperature resistance, electrical insulation, high breathability, dielectric properties, and weather resistance due to its Si-O bond on main chain with side groups including methyl, vinyl, and phenyl. 1-5 Over the past decades, SR materials have been widely used in various areas, such as medical and health, aerospace, wire and cable, automotive industry, architecture, and so on. 6-8 However, SR is flammable and can keep burning when exposed to open flames, which limits its application in the field of electronic appliances.

show abstract

Section: Resultsmentioning

confidence: 99%

“…With using this method, the important fire hazard parameters, including heat release rate (HRR) and THR can be conveniently obtained. 1,2,39 The curves and detailed data for the unaged and aged FRSR were depicted in Figure 8. In general, the value of HRR was relatively low for a highly flame retardant system.…”

Section: Cone Calorimetry Analysismentioning

confidence: 99%

Thermal aging properties of flame retardant silicone rubber based on melamine cyanurate

Zhou

Wang

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…However, because of the disadvantages of its large addition amount and poor compatibility with the substrate, it greatly reduces the mechanical properties of the composite. 6 IFR are a class of halogen-free compound flame retardants. 7 The flame retardant mechanism can be simply explained as follows: The polymer burns in the air and releases ammonia at a certain temperature and pressure, diluting the flammable gas and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Effect of sepiolite on properties of silicone rubber/melamine/starch/sepiolite flame retardant composites

Liu

Xin

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this work, a novel silicone rubber composite with low smoke, good mechanical property, and excellent flame retardant was prepared by introducing melamine (MEL), starch (St), and sepiolite (SEP) into SR. The effect of the amount of SEP on the mechanical properties of SR composites was investigated. The results showed that the mechanical properties were optimal when the amount of SEP was 30 phr. The tensile sections of the composites were characterized by SEM. The flame retardant properties of the composites were evaluated by oxygen index, vertical combustion, and cone calorimetry test (CCT). The thermal stability of the composites was tested by TGA. The flame retardant mechanism of the composites was also discussed. It was found that the strength and stability of the carbon layer of the composite were remarkably enhanced, and the flame retardant properties of the materials were improved with the addition of SEP. The SEM images of CCT carbon residues revealed that the carbon layer of the composite with SEP was more stable and had fewer cracks than that without SEP. This work provides new insights for the preparation of high‐performance SR composite.

show abstract

“…On the one hand, Si can provide a nanoscale Si-O-Si intramolecular hybridization structure, which is thermally stable and prevents matrix decomposition. 17 On the other hand, N generation reduces O concentration, which further reduces the release of toxic gases and smoke during combustion. 18 Zhang et al 19 constructed a cross-linked network based on cyanate ester (CE) and hybridized GO with Si and N. CE composites not only had higher thermal stability but also achieved outstanding ame retardancy, producing more residual chars with graphitization, than with pure CE resin.…”

Section: Introductionmentioning

confidence: 99%

Covalently functionalized graphene oxide wrapped by silicon–nitrogen-containing molecules: preparation and simultaneous enhancement of the thermal stability, flame retardancy and mechanical properties of epoxy resin nanocomposites

Sui

et al. 2020

RSC Adv.

View full text Add to dashboard Cite

show abstract

Effect and mechanism of hepta-phenyl vinyl polyhedral oligomeric silsesquioxane on the flame retardancy of silicone rubber

Cited by 31 publications

References 31 publications

Thermal aging properties of flame retardant silicone rubber based on melamine cyanurate

Thermal aging properties of flame retardant silicone rubber based on melamine cyanurate

Effect of sepiolite on properties of silicone rubber/melamine/starch/sepiolite flame retardant composites

Covalently functionalized graphene oxide wrapped by silicon–nitrogen-containing molecules: preparation and simultaneous enhancement of the thermal stability, flame retardancy and mechanical properties of epoxy resin nanocomposites

Contact Info

Product

Resources

About