Flame retardant effect of phosphotungstic acid intercalated ZnAl layered double hydroxides and intumescent flame retardant on epoxy-polyamide resin

TANG Liandong; WU Yuanbo; YUAN Liping; HU Yunchu; LIU Yuejiao; FAN Youhua

doi:10.13801/j.cnki.fhclxb.20200512.001

Volume 37 Issue 9

Sep. 2020

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TANG Liandong, WU Yuanbo, YUAN Liping, et al. Flame retardant effect of phosphotungstic acid intercalated ZnAl layered double hydroxides and intumescent flame retardant on epoxy-polyamide resin[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2125-2136. doi: 10.13801/j.cnki.fhclxb.20200512.001

Citation:

TANG Liandong, WU Yuanbo, YUAN Liping, et al. Flame retardant effect of phosphotungstic acid intercalated ZnAl layered double hydroxides and intumescent flame retardant on epoxy-polyamide resin[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2125-2136. doi: 10.13801/j.cnki.fhclxb.20200512.001

Citation:

TANG Liandong, WU Yuanbo, YUAN Liping, et al. Flame retardant effect of phosphotungstic acid intercalated ZnAl layered double hydroxides and intumescent flame retardant on epoxy-polyamide resin[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2125-2136. doi: 10.13801/j.cnki.fhclxb.20200512.001

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Flame retardant effect of phosphotungstic acid intercalated ZnAl layered double hydroxides and intumescent flame retardant on epoxy-polyamide resin

doi: 10.13801/j.cnki.fhclxb.20200512.001

TANG Liandong^1
,,
WU Yuanbo^2
,,
YUAN Liping^{1
,
,},
HU Yunchu^1
,,
LIU Yuejiao^1
,,
FAN Youhua^3
,

1.
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
2.
School of Science, Central South University of Forestry and Technology, Changsha 410004, China
3.
Hunan Academy of Forestry, Changsha 410004, China

Received Date: 2019-11-06
Accepted Date: 2020-04-22

Available Online: 2020-05-12

Publish Date: 2020-09-15

Abstract

Abstract

The PW₁₂O₄₀-ZnAl layered double hydroxides(LDHs) was prepared by using [PW₁₂O₄₀]³⁻ ion pillared intercalation NO₃-ZnAl LDHs. The composition and structure were analyzed by XRD, FTIR, inductively coupled plasma(ICP) and SEM. The flame retardant epoxy-polyamide resin(EP-PA) were prepared by NO₃-ZnAl LDHs or PW₁₂O₄₀-ZnAl LDHs compound with intumescent flame retardants(IFRs) containing ammonium polyphosphate, melamine, pentaerythritol. The heat and smoke release rules of different ZnAl LDHs-IFRs flame retardant EP-PA were evaluated by back temperature experiment and cone calorimetry experiment. TGA result shows that the maximum degradation rate of PW₁₂O₄₀-ZnAl-IFRs/(EP-PA) composite is the lowest, and the carbon residue rate is the highest, which indicate that PW₁₂O₄₀-ZnAl LDHs improve the oxidation resistance of PW₁₂O₄₀-ZnAl-IFRs/(EP-PA) composite at high temperature. The back temperature experiment results show that under the same heat radiation intensity, the back temperature of PW₁₂O₄₀-ZnAl-IFRs/(EP-PA) composite reaches to 200℃ and 300℃ with the longest time and the lowest rate of back temperature rise. The results show that PW₁₂O₄₀-ZnAl LDHs can obviously enhance the fire resistance of EP-PA. From cone calorimetry experimental data, it can be seen that PW₁₂O₄₀-ZnAl-IFRs makes PW₁₂O₄₀-ZnAl-IFRs/(EP-PA) composite have the lowest peak of heat release rate(PHRR), mean heat release rate(MHRR), mean effective heat of combustion(MEHC) and total heat release(THR). Its fire growth index (FGI) is only 14.5% of IFRs/(EP-PA) composite, and the total smoke production (TSP) is 27.6% lower than NO₃-ZnAl-IFRs/(EP-PA) composite and 55.3% lower than IFRs/(EP-PA) composite. The results suggest that PW₁₂O₄₀-ZnAl-IFRs is more effective than NO₃-ZnAl-IFRs in reducing the heat release and inhibiting the generation of flue gas.
- ZnAl layered double hydroxides,
- intercalation modification,
- epoxy-polyamide resin,
- flame retardant,
- back temperature rate
Long Abstrsct
Innovation Points

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References(25)

References

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