Influence of zinc borate on flame retardant and thermal properties of polyurethane elastomer composites containing huntite‐hydromagnesite mineral

Dike, Ali Sinan; Tayfun, Ümit; Doğan, Mehmet

doi:10.1002/fam.2428

Cited by 31 publications

(27 citation statements)

References 47 publications

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“…For TPhP, it may be due to the fact that the thermal decomposition of TPhP produces phosphoric acid, leading to help the degradation of PU to form the compact char layer . The observed decrease of ZnB composites was due to the diluting effect of ZnB …”

Section: Resultsmentioning

confidence: 99%

Rigid polyurethane foams with halogen‐free flame retardants: Thermal insulation, mechanical, and flame retardant properties

Akdoğan

Erdem

Üreyen

et al. 2019

J of Applied Polymer Sci

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Rigid polyurethane foam (RPUF) composites with triphenyl phosphate (TPhP), aluminum trihydrate (ATH), and zinc borate (ZnB) alone, as well as their binary blends, were prepared via a one-shot process. The amount of flame retardant (FR) or FR blend was varied from 10 to 50% by polyol weight percentage, and the weight fraction of the blends was also fixed at 40%. The effects of additives on thermal insulation, mechanical, and flame retardancy properties of the composites were investigated. Thermal conductivity of the neat foam (RPUF) decreased from 22.53 to 21.04-21.58 mW m −1 K −1 . The compressive strength of foams displayed an increase with increasing the amount of TPhP, ATH, and ZnB till 40% by weight. The limited oxygen index values of all foams increased and the flame spread rates of all foams significantly decreased. It was also observed that the flame was self-extinguished in some cases. The cone calorimeter test results indicated that the FR additives improved the flame retardancy of the RPUF. INDTRODUCTIONRigid polyurethane foams (RPUFs) are one of the most consumed polymeric materials to a great extent. They have wide range applications in insulation, transportation, building construction, domestic appliance, automobile industry, and many others because of their high closed-cell content, low thermal conductivity, high strength with low weight, good shock absorption, and so on. 1-3 Nowadays, humanity is under threat because of limited energy resources in the world. In that case, RPUFs possessing low thermal conductivity values come into prominence because RPUFs are one of the unique materials for thermal insulation. RPUFs predominantly contain closed-cell structures, and in the closed-cell structures of foams, a blowing agent constituting the gas is trapped during production. The thermal conductivity of an RPUF is strongly affected by this blowing agent. The lower thermal conductivity of the blowing agent causes the lower thermal conductivity of RPUF. 4,5 When RPUFs compare with the conventional thermal insulating materials such as brick, concrete, wood, glass fiber, and so on, the conventional materials need to be used at much higher thickness in an attempt to match the insulation performance of 50 mm RPUF, for instance, ranging from 1720 mm for brick, 200 mm for wood, and 80 mm for polystyrene. The excellent thermal insulation property of RPUFs is not the only parameter making RPUFs one of the most used engineering materials but also their high mechanical strength with low weight and their easy processability make it as an interesting material. 6,7 For example, RPUF is one of the most important structural element of the refrigerators' skeleton besides providing high insulation for home refrigerators.However, as in the case of a majority of polymeric materials, RPUF is also easily combustible. As a matter of fact that, it is more combustible than other materials because of its rigid cellular and organic structure, additionally, it contains flammable, explosive gases in its closed cells. During the burnin...

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Section: Resultsmentioning

confidence: 99%

Rigid polyurethane foams with halogen‐free flame retardants: Thermal insulation, mechanical, and flame retardant properties

Akdoğan

Erdem

Üreyen

et al. 2019

J of Applied Polymer Sci

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“…It disrupted the crystallization of hard segment and restricted the inter-reaction of polyurethane chains. 17…”

Section: Characteristics Of Dopo-dammentioning

confidence: 99%

“…In recent years, halogen-free ame retardants containing phosphorus, nitrogen, silicon, boron and other ame-retarded elements have been widely developed and applied in polyurethane fabrication. [11][12][13][14][15][16][17] Among them, phosphorus-containing ame retardants, especially 9,10-dihydro-9-oxa-10phosphaphenanthrene-10-oxide (DOPO) and its derivatives, have attracted much attention. Compared with other linear lowmolecular-weight phosphonates, phosphorous compounds, DOPO and its derivatives display high thermal stability, excellent ame retardancy and low toxicity due to the presence of cyclic phosphate groups with a diphenyl structure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a novel flame retardant based on DOPO derivatives and its application in waterborne polyurethane

Hui

Wang

et al. 2019

RSC Adv.

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“…On the other hand, Zinc borate (ZnB) that is an effective inorgan-Submission date: 11-01-2020 | Review date: 02-04-2020 ic flame retardant additive is widely used both solely and in combination with other materials. Its influence as corrosion inhibitor, smoke suppressant, afterglow suppresant, synergistic agent improves elongation properties of polyoefins reported and emphasized by many authors [18][19][20].…”

Section: Introductionmentioning

confidence: 89%

Investigations of Flame Retardant Properties of Zinc Borate Accompanying with Huntite and Hydromagnesite in Polymer Composites

Atay

İçin

Kuru

2020

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Fires have been a danger to human beings for the centuries. As people lost their lives and property in fires, they tried to fight the fire and their efforts in this area continued increasingly. Unfortunately, it is still not possible to completely reset the risk of starting the fire. But it seems likely to extinguish immediately after the fire has started, and this is very important to save people’s lives. Scientists have been working in this field in recent years; they are concentrated on producing fire-resistant materials using different materials. This can be provided by different ways; either fire-resistant material can be produced new, or the fire resistivity can be provided by incorporating the additive material into a flammable material. In our previous studies, we used huntite and hydromagnesite minerals to give fire resistance property to polymer materials, very successful results were obtained. In this study, huntite and hydromagnesite minerals were used for accompanying with zinc borate in polypropylene composites in order to increase the flame retardant property of a polymeric materials. Different content of minerals were blended with polypropylene, and composites were produced by twin-screw extruder for observing synergistic effect. Scanning electron microscopy (SEM) analyses were conducted to determine the structural and morphological properties of the composites. Thermal properties were determined according to thermogravimetric analysis (TGA). Tensile and three point bending tests were carried out to obtain mechanical properties. Flame retardant performance was evaluated according to UL 94 vertically flammability test. It was concluded that very good synergistic effects were obtained that zinc borate was significantly influential with huntite/hydromagnesite in the flammability characteristics of composites because higher char formation is observed with zinc borate addtion. Moreover, the zinc borate reduced the smoke generated during combustion.

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Influence of zinc borate on flame retardant and thermal properties of polyurethane elastomer composites containing huntite‐hydromagnesite mineral

Cited by 31 publications

References 47 publications

Rigid polyurethane foams with halogen‐free flame retardants: Thermal insulation, mechanical, and flame retardant properties

Rigid polyurethane foams with halogen‐free flame retardants: Thermal insulation, mechanical, and flame retardant properties

Synthesis of a novel flame retardant based on DOPO derivatives and its application in waterborne polyurethane

Investigations of Flame Retardant Properties of Zinc Borate Accompanying with Huntite and Hydromagnesite in Polymer Composites

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