Synthesis of a boron/nitrogen-containing compound based on triazine and boronic acid and its flame retardant effect on epoxy resin

Zhang, Tie; Liu, Weishi; Wang, Meixiao; Liu, Ping; Pan, Yonghong; Liu, Dongfa

doi:10.1177/0954008316650929

Cited by 41 publications

(26 citation statements)

References 31 publications

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“…The absorption peak appears at 980 and 910 cm −1 corresponding to OH bending variation in POH and BOH groups, respectively. The peak appears at 1107 cm −1 is attributed to the stretching variation of POP and the peak at 1467 cm −1 is contributed to BO stretching variation . The peak appears at 1629 cm −1 is assigned to NH variable angle vibration of

{NH}_{2}^{+}

and the peaks at 3016, 2769, 2598, and 2234 cm −1 are attributed to the NH stretching variation of the

{NH}_{2}^{+}

.…”

Section: Resultsmentioning

confidence: 96%

Synthesis of the poly(phosphoric‐boric acid) piperazine and its application as an effective flame retardant for epoxy resins

Liu

et al. 2017

Polymer Engineering & Sci

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A novel phosphorus‐nitrogen‐boron containing flame retardant additive of poly(phosphoric‐boric acid) piperazine, defined as PPBAP was synthesized by the salt‐forming reaction between anhydrous piperazine and phosphoric/boric acid, and the dehydration polycondensation under heating in nitrogen atmosphere. The synthesized PPBAP and curing agent m‐phenylenediamine were blended into epoxy resins (EP) to prepare flame retardant EP thermosets. The results demonstrated that the flame retardant EP thermosets successfully passed UL‐94 V‐0 rating during vertical burning tests and the limited oxygen index value was as high as 31.9% by incorporating 4 wt% PPBAP. The prepared PPBAP possessed excellent charring capability, meanwhile, PPBAP stimulated epoxy resins matrix decomposed and charring ahead of time due to its catalytic decomposition effect, which led to a higher char yield at high temperature. The incorporation of small amount of PPBAP almost not affected the glass transition temperature of EP thermosets. There are good compatibility between PPBAP and EP matrix, and the EP/PPABP thermosets remained excellent mechanical performance. The introduction of PPBAP benefited to the formation of a sufficient, more compact, homogeneous char layer with high strength on materials surface during combustion. The formed char layer effectively suppressed the heat transmission and diffusion, limited the production of combustible gases and inhibited the emission of smoke, which led to the reduction of the heat and smoke release. Moreover, the av‐EHC value was obviously declined with the addition of PPBAP into EP thermosets. POLYM. ENG. SCI., 58:1858–1867, 2018. © 2017 Society of Plastics Engineers

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{NH}_{2}^{+}

and the peaks at 3016, 2769, 2598, and 2234 cm −1 are attributed to the NH stretching variation of the

{NH}_{2}^{+}

.…”

Section: Resultsmentioning

confidence: 96%

Synthesis of the poly(phosphoric‐boric acid) piperazine and its application as an effective flame retardant for epoxy resins

Liu

et al. 2017

Polymer Engineering & Sci

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“…최근에, 붕소를 함유한 실리카 졸을 사용하여 절연층, 증 가된 숯 잔류물 및 우수한 연기 억제성을 가진 난연성 원 단을 제조하였다 (14) . 이전의 일부 연구에서는 단일 난연 시 스템에 인/질소 (15)(16)(17) , 인/붕소 (18,19) 및 붕소/질소 (20) 와 같은 다 중 방염재의 혼입이 방염 효율을 더 많이 향상시킬 수 있 다는 것을 제안하였으며, 단일 시스템에서 실리카, 인 및 질소의 존재는 직물의 열 산화 안정성 및 난연 특성 모두 를 증가시킨다는 것을 발견했다 (21) . (22) .…”

Section: 서 론unclassified

Smoke Hazard Assessment of Cypress Wood Coated with Boron/Silicon Sol Compounds

Jin¹,

Chung²

2020

Fire Sci. Eng.

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In this study, boron/silicon sol compounds were applied to wood for construction and durable materials, and fire risks were investigated in terms of smoke performance index (SPI), smoke growth index (SGI), and smoke intensity (SI). The compound was synthesized by reacting tetraethoxyorthosilicate with boric acid and boronic acid derivatives. Smoke characteristics were investigated using a cone calorimeter (ISO 5660-1) equipment for cypress wood. The fire intensity fixed the external heat flux at 50 kW/m<sup>2</sup>. The smoke performance index measured after the combustion reaction increased between 13.4% and 126.7% compared with cypress wood. The fire risk due to the smoke performance index decreased in the order of cypress, phenylboronic acid/silicon sol (PBA/Si), (2-methylpropyl) boronic acid/silicon sol (IBBA/Si), boric acid/silicon sol (BA/Si). The smoke growth index decreased between 12.0% and 57.5% compared to the base specimen. The risk of fire caused by the smoke growth index decreased in the order of cypress, PBA/Si, IBBA/Si, BA/Si. The fire risk due to smoke intensity decreased between 3.2% and 57.8%, and in the order of cypress, PBA/Si, IBBA/Si, BA/Si. CO<sub>peak</sub> concentrations ranged between 85 and 93 ppm, and decreased between 37% and 43% compared to the base specimen. A comprehensive assessment of the fire risk on smoke hazards decreased in the order of cypress, PBA/Si, IBBA/Si, BA/Si.

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“…최 근에 실리콘붕소 졸이 모섬유 난연제로 사용될 경우 열 절 연 장벽으로 작용하며 탄소 잔여물을 증가시키고 좋은 연 기 억제성을 가지고 있음이 밝혀졌다 (2) . 또한, 인/질소 (7)(8)(9)(10) , 인/붕소 (11,12) 와 붕소/질소 (13) 와 같은 여러 원소의 혼입은 난 연 효율성을 높이는 결과를 가져왔다. 그러나 실리카졸에 무기 붕소를 혼입시킨 연구는 거의 없으므로 친환경적인 붕소를 포함하는 난연재의 응용은 연구를 확대할 필요성이 있다.…”

unclassified

Heat Risk Assessment of Wood Coated with Boron/Silicone Sol

Jin¹,

Chung²

2019

Fire Sci Eng

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This study was examined fire risk properties of wood specimen for the constructional interiors, especially focusing on the fire performance index (FPI) and the fire growth index (FGI) as heat hazard characteristics. Flame retardants were synthesized using boric acid, boronic acid and tetraethoxyorthosilicate. Heat release characteristics were measured by using a cone calorimeter (ISO 5660-1) and cypress was used. The external heat flux as fire intensity was maintained at 50 kW/m 2. The measured fire performance index (FPI) after burning was increased by 1.6 times for boric acid/silicone (BA/Si) sol, each 1.1 times for isobutylboronic acid/silicone (IBBA/Si) sol and phenylboronic acid/silicone (PBA/Si) sol compared with cypress. Fire risk by the fire performance index was increased BA/Si, IBBA/Si ≈ PBA/Si order. The fire growth index was decreased 94% for the BA/Si and 8% for the IBBA/Si sol, and was increased by 17% for the PBA/Si sol. Fire risk by the fire growth index was increased BA/Si, IBBA/Si, PBA/Si order. Overall fire risk was higher in the order of BA/Si < IBBA/Si < PBA/Si.

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Synthesis of a boron/nitrogen-containing compound based on triazine and boronic acid and its flame retardant effect on epoxy resin

Cited by 41 publications

References 31 publications

Synthesis of the poly(phosphoric‐boric acid) piperazine and its application as an effective flame retardant for epoxy resins

Synthesis of the poly(phosphoric‐boric acid) piperazine and its application as an effective flame retardant for epoxy resins

Smoke Hazard Assessment of Cypress Wood Coated with Boron/Silicon Sol Compounds

Heat Risk Assessment of Wood Coated with Boron/Silicone Sol

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