Exposure of hydrocarbon intumescent coatings to the UL1709 heating curve and furnace rheology: Effects of zinc borate on char properties

In the current study, promising glass composites based on vanadium pentoxide (V2O5)-doped zinc borate (ZnB) were investigated in terms of their nuclear-radiation-shielding dynamics. The mass and linear attenuation coefficient, half-value layer, mean free path, tenth-value layer, effective atomic number, exposure-buildup factor, and energy-absorption-buildup factor were deeply simulated by using MCNPX code, Phy-X PSD code, and WinXcom to study the validation of ZBV1, ZBV2, ZBV3, and ZBV4 based on (100−x)(0.6ZnO-0.4B2O3)(x)(V2O5) (x = 1, 2, 3, 4 mol%) samples against ionizing radiation. The results showed that attenuation competencies of the studied glasses slightly changed while increasing the V2O5 content from 1 mol% to 4 mol%. The domination of ZnO concentration in the composition compared to B2O3 makes ZnO substitution with V2O5 more dominant, leading to a decrease in density. Since density has a significant role in the attenuation of gamma rays, a negative effect was observed. It can be concluded that the aforementioned substitution can negatively affect the shielding competencies of studied glasses.

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An accelerated and effective synthesis of zinc borate from zinc sulfate using sonochemistry

Main Group Metal Chemistry ◽

10.1515/mgmc-2020-0002 ◽

2020 ◽

Vol 43 (1) ◽

pp. 7-14

Author(s):

Ali Can Ersan ◽

Azmi Seyhun Kipcak ◽

Meral Yildirim Ozen ◽

Nurcan Tugrul

Keyword(s):

Inorganic Compounds ◽

Zinc Borate ◽

High Yield ◽

X Ray Diffraction ◽

Ultrasonic Probe ◽

Minimum Particle Size ◽

Effective Synthesis ◽

Ft Ir ◽

Lower Temperature ◽

Borate Compound

AbstractRecently, sonochemistry has been used for the synthesis of inorganic compounds, such as zinc borates. In this study using zinc sulphate heptahydrate (ZnSO4·7H2O) and boric acid (H3BO3) as starting materials, a zinc borate compound in the form of Zn3B6O12·3.5H2O was synthesized using an ultrasonic probe. Product’s characterization was carried out with using X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR) and Raman spectroscopy. Zinc borate compound’s chemical bond structure was observed with Raman and FTIR. From the XRD results it was seen that Zn3B6O12·3.5H2O can be quickly synthesized upon heating at 80°C and 85°C (55 min) or 90°C (45 min) in very high yield (>90%). The minimum particle size obtained was ~143 μm from the SEM results. Zinc borate compound was synthesized at a lower temperature in less time than other synthesized zinc metal compound in literature.

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A simplified method for calculating non-uniform temperature distributions in thin-walled steel members protected by intumescent coatings under localized fires

Thin-Walled Structures ◽

10.1016/j.tws.2021.107580 ◽

2021 ◽

Vol 162 ◽

pp. 107580

Author(s):

Qing Xu ◽

Guo-Qiang Li ◽

Yong C. Wang

Keyword(s):

Uniform Temperature ◽

Temperature Distributions ◽

Intumescent Coatings ◽

Steel Members ◽

Simplified Method ◽

Thin Walled

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Flame Retardant Properties of a Guanidine Phosphate–Zinc Borate Composite Flame Retardant on Wood

ACS Omega ◽

10.1021/acsomega.1c00882 ◽

2021 ◽

Author(s):

Linyuan Wang ◽

Yabing Yang ◽

Hongbo Deng ◽

Wenyi Duan ◽

Jiajie Zhu ◽

...

Keyword(s):

Flame Retardant ◽

Zinc Borate ◽

Flame Retardant Properties ◽

Guanidine Phosphate

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Effect of Triaryl Phosphate, Zinc and Zinc Borate on Fire Properties of High Impact Polystyrene and High Impact Polystyrene-Polyphenylene Oxide Blend (Modified-Polyphenylene Oxide

Journal of Fire Sciences ◽

10.1177/073490419401200605 ◽

1994 ◽

Vol 12 (6) ◽

pp. 529-550 ◽

Cited By ~ 5

Author(s):

Ramazan Benrashid ◽

Gordon L. Nelson ◽

Donald J. Ferm

Keyword(s):

Flame Retardancy ◽

High Impact ◽

Zinc Borate ◽

Polyphenylene Oxide ◽

High Impact Polystyrene ◽

Smoke Generation ◽

Flame Retarded ◽

Rate Of Heat Release ◽

Fire Properties ◽

Phase Activity

Samples of m-PPO (virgin and flame retarded) and high impact polystyrene blended with zinc and zinc borate (2ZnO·3B2O3·3.5H 2O), were pre pared. The effect of triaryl phosphate on the flame retardancy of PPO-HIPS in conjunction with zinc and zinc borate was studied. For polystyrene zinc borate shows some reduction in smoke generation. Zinc, however does not show any effect on smoke generation for high impact polystyrene. Triphenyl phosphate shows minimal flame retardancy in HIPS which is not enhanced by zinc. Addition of zinc gives an increase in oxygen index for FR m-PPO, whereas zinc borate decreases the OI values. Zinc borate may sequester triaryl phos phate and thus eliminate its vapor phase activity. Zinc borate shows a signifi cant reduction in smoke generation and rate of heat release for m-PPO.

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Effect of Zinc, Zinc Oxide and Zinc Borate on the Flammability of Polycarbonate

Journal of Fire Sciences ◽

10.1177/073490419501300305 ◽

1995 ◽

Vol 13 (3) ◽

pp. 224-234 ◽

Cited By ~ 2

Author(s):

Ramazan Benrashid ◽

Gordon L. Nelson ◽

Donald J. Ferm ◽

Leland W. Chew

Keyword(s):

Zinc Oxide ◽

Heat Release ◽

Oxygen Index ◽

Ohio State University ◽

Zinc Borate ◽

State University ◽

Dsc Studies ◽

Release Studies ◽

Chamber Studies ◽

Smoke Chamber

Polycarbonate was blended with zinc, zinc borate (2ZnO·3B2O 3·3.5H2O) and zinc oxide. Blends made of zinc/polycarbonate and especially zinc borate/polycarbonate show major improvement in oxygen index values. Ohio State University (OSU) heat release studies show reduction in heat release only for zinc borate/polycarbonate blends compared to virgin polycarbonate. No improvement in smoke suppression was observed from NBS Smoke Chamber studies for these blends. From DSC studies there was a low ering of Tg's. Thermogravimetric analyses show the blends have lower tempera ture stability in nitrogen (50% weight loss) compared to a control.

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