Synergistic effects between silicon-containing flame retardant and DOPO on flame retardancy of epoxy resins

Zhang, Le; Wang, Youchuan; Liu, Qiang; Cai, Xufu

doi:10.1007/s10973-015-5046-6

Cited by 55 publications

(34 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, the peak value of tan δ is taken as the characteristic temperature of the glass transition temperature ( T g ). All the samples have a single peak of T g , which maybe conjecture that the epoxy resin mixtures exhibit a completely homogeneous morphology . Besides, we can also find in Table that the T g values (measured by DMA and DSC) show the same trend of changes.…”

Section: Resultssupporting

confidence: 54%

Highly efficient multielement flame retardant for multifunctional epoxy resin with satisfactory thermal, flame‐retardant, and mechanical properties

Chen

Lin

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

Multifunctional epoxy resins with excellent, thermal, flame‐retardant, and mechanical properties are extremely important for various applications. To solve this challenging problem, a novel highly efficient multielement flame retardant (PMSBA) is synthesized and the flame‐retardant and mechanical properties of modified epoxy resins are greatly enhanced without significantly altering their and thermal properties by applying the as‐synthesized PMSBA. The limiting oxygen index value reaches up to 29.6% and could pass the V‐0 rating in the UL‐94 test with even low P content (0.13%). Furthermore, cone calorimetry results demonstrate that 30.3% reduction in the peak heat release rate for the sample with 10.0 wt% PMSBA is achieved. X‐ray photoelectron spectroscopy and scanning electron microscopy indicate that Si‐C, Si‐N, and phosphoric acid derivative can be transformed into a multihole and intumescent char layer as an effective barrier, preserving the epoxy resin structure from fire. More importantly, mechanical properties such as impact strength, tensile strength, and flexural strength are also increased by 63.86%, 33.54%, and 15.65%, respectively, which show the incorporation of PMSBA do not deteriorate the mechanical properties of modified epoxy resins. All the results show that PMSBA is a promising strategy for epoxy resin with satisfactory, thermal, flame‐retardant, and mechanical properties.

show abstract

Section: Resultssupporting

confidence: 54%

Highly efficient multielement flame retardant for multifunctional epoxy resin with satisfactory thermal, flame‐retardant, and mechanical properties

Chen

Lin

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…One is related to the application method. Generally, DOPO is used by pre‐reaction with epoxy, which will reduce the functionality of the resin and ultimately affect the property of the modified epoxy resin . The other is related to the chemical structure of DOPO.…”

Section: Introductionmentioning

confidence: 99%

“…The use of DOPO as the reactive flame retardant for epoxy resins has been studied by many research groups. However, the reported performance data such as the T g value, the decomposition temperature, the limiting oxygen index (LOI) value, and UL‐94 test results of the epoxy resins have been fairly varied . The discrepancies may be attributed to the different types of epoxy resins used to conduct those works, under various experimental conditions, with various phosphorus content calculation methods and using different instruments for testing.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, DOPO is used by pre-reaction with epoxy, which will reduce the functionality of the resin and ultimately affect the property of the modified epoxy resin. [16][17][18] The other is related to the chemical structure of DOPO. Its rigid cyclic structure influences the crosslink density of the epoxy resins, the P─O bond in phosphaphenanthrene is unstable when heated, and the oxygen element in phosphaphenanthrene readily forms hydrogen bond with hydrone.…”

Section: Introductionmentioning

confidence: 99%

“…However, the reported performance data such as the T g value, the decomposition temperature, the limiting oxygen index (LOI) value, and UL-94 test results of the epoxy resins have been fairly varied. 12,[14][15][16][17][18] The discrepancies may be attributed to the different types of epoxy resins used to conduct those works, under various experimental conditions, with various phosphorus content calculation methods and using different instruments for testing. In this work, in order to make the results comparable, DOPO-and DPO-modified DGEBA epoxy resins were prepared and tested under the exact same conditions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance comparison of epoxy resins modified with diphenylphosphine oxide and DOPO

Wei

et al. 2019

Fire and Materials

View full text Add to dashboard Cite

Summary By curing the reaction mixture of diphenylphosphine oxide (DPO) and diglycidyl ether of bisphenol A with 4,4′‐diaminodiphenylsulfone, flame‐retardant epoxy resins (EP/DPO) were prepared. Flame‐retardant epoxy resins modified with 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) were similarly prepared (denoted as EP/DOPO). The limiting oxygen index value of pure epoxy resin, EP/DPO–P‐0.9 (with a phosphorus content of 0.9 wt%), and EP/DOPO–P‐0.9 are 23.0, 30.5, and 29.4%, respectively. EP/DPO–P‐0.9 reached a UL‐94 vertical burning test V‐0 rating, while EP/DOPO–P‐0.9 failed. The results of the cone calorimetry test, thermo‐oxidative degradation behavior study, and pyrolysis‐gas chromatography/mass spectrometry analysis indicated that both flame retardants mainly act through the gas‐phase activity mechanism. Together, the results of this study suggest that EP/DPO are high performance resins with good thermal stability, high glass transition temperature, and low water absorptivity for practical applications.

show abstract

Flame‐retardant behavior of a phosphorus/silicon compound on polycarbonate

Fang

Qian

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

A phosphorus/silicon flame retardant, MVC-DOPO, was synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 2,4,6,4,6, via addition reaction. Its flame-retardant effect on polycarbonate (PC) was investigated. The phosphorus/silicon flame retardant increased the limited oxygen index and UL-94 rating and reduced the heat release rate and total heat release of DOPO-MVC/PC composites during combustion, indicating the excellent flame-retardant effect of MVC-DOPO on PC. MVC-DOPO inhibited the burning intensity of PC material in the gaseous phase and promoted the formation of a more viscous residue in the condensed phase. Through releasing phosphorus-containing pieces and phenoxy radicals from the phosphaphenanthrene group, MVC-DOPO quenched the combustion chain reaction in the gaseous phase; through promoting formation of a more viscous residue and a dense char layer from the main actions of the cyclotetrasiloxane group, MVC-DOPO reduced fuel release and generated a barrier effect in the condensed phase. Hence, MVC-DOPO effectively exerted a flame-retardant effect on PC material in both the gaseous and condensed phases during combustion. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45815.

show abstract

Synergistic effects between silicon-containing flame retardant and DOPO on flame retardancy of epoxy resins

Cited by 55 publications

References 31 publications

Highly efficient multielement flame retardant for multifunctional epoxy resin with satisfactory thermal, flame‐retardant, and mechanical properties

Highly efficient multielement flame retardant for multifunctional epoxy resin with satisfactory thermal, flame‐retardant, and mechanical properties

Performance comparison of epoxy resins modified with diphenylphosphine oxide and DOPO

Flame‐retardant behavior of a phosphorus/silicon compound on polycarbonate

Contact Info

Product

Resources

About