The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform
Yang Jian-ming - One of the best experts on this subject based on the ideXlab platform.
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Flame-retardation characteristics and mechanisms of three inorganic magnesium compounds as fire-retardant for wood
Journal of Central South University of Forestry & Technology, 2012Co-Authors: Yang Jian-mingAbstract:In order to explore the flame-retardation effects and characteristics of inorganic magnesium compounds as wood fire-retardant,cone calorimeter(CONE) and thermal gravity—differential scanning calorimeter analyzer(TG-DSC) were used to analyze the combustion properties,smoke-release properties,and carbonization characteristics of wood powder treated by three important inorganic magnesium compounds——magnesium hydroxide,hydrated magnesium chloride,and basic magnesium carbonate.Results showed that: all of these three magnesium compounds could reduce the heat release rate(HRR) and total smoke production(TSP) of wood,showing good flame-retardation and smoke-suppression effects.Three magnesium compounds exert their flame-retardation effects by different mechanism: magnesium hydroxide could release moisture at a time when wood is going to drastically pyrolyze,and produce melts to protect wood;hydrated magnesium chloride could retard or put out fire at both the solid stage and the Gas stage;basic magnesium carbonate protects wood from fire by releasing Incombustible Gas;basic magnesium carbonate and hydrated magnesium chloride have synergistic flame-retardation and smoke-suppression effects.
Miwa Takashi - One of the best experts on this subject based on the ideXlab platform.
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Increase in flame retardance of glass-epoxy laminates without halogen or phosphorous compounds by simultaneous use of Incombustible-Gas generator and charring promoter
Journal of Applied Polymer Science, 2006Co-Authors: Yukihiro Kiuchi, Nagashima Hiroaki, Miwa TakashiAbstract:Highly flame-resistant glass-epoxy laminates without flame-retarding additives such as halogen and phosphorous compounds have been developed to overcome environmental problems caused by these additives. The laminates consist mainly of a self-extinguishing epoxy-resin compound (phenol aralkyl), an Incombustible-Gas generator (amino-triazine-novolac hardener: ATN hardener), and inorganic materials such as a charring promoter (zinc molybdate on talc: ZMT) and a limited amount of harmless metal hydroxide (aluminum trihydroxide: ATH). They are highly flame-resistant and have other beneficial characteristics, including soldering-heat resistance, humidity resistance, electronic properties, and processing advantages. These qualities make them applicable enough to replace the FR-4 type printed wiring boards (PWBs) that are widely used today. Simultaneously using the ATN hardener and ZMT in the laminates, including the epoxy-resin compound and ATH, greatly improved their flame retardance. We then reduced the amount of ATH to obtain even better flame retardance in the laminates. This reduction of the ATH, consequently, improved other practical characteristics such as soldering-heat resistance, humidity resistance, and electronic properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3367–3375, 2006
Yan Qing - One of the best experts on this subject based on the ideXlab platform.
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Comparative Performance of Three Magnesium Compounds on Thermal Degradation Behavior of Red Gum Wood.
Materials, 2014Co-Authors: Chunhua Yao, Hu Yunchu, Xiaodan Zhu, Yan QingAbstract:The effect of basic magnesium carbonate (BMC), magnesium hydroxide (MH), and magnesium chloride hydrate (MCH) on thermal degradation of red gum wood was studied using cone calorimetry, Thermogravimetric-differential scanning calorimetry (TG-DSC) analysis, and X-ray diffraction (XRD) characterization. The results showed common fire retardation actions of the three compounds by releasing Incombustible Gas and/or water vapor to dilute combustible Gas in the flaming zone, and by converting to MgO, which had a satisfactory protective wall effect on the wood. Individually, BMC absorbed heat from the wood at the pre-decomposition stage and, thus, slowed down wood pyrolysis process. It slightly increased the char yield by charring in both the charring stage and the char calcination stage. MH lost water at about 270 °C, close to the temperature at which wood thermally degraded. MH rendered wood char quickly, and the compact char layer impeded further carbonization and burning of inner wood. MCH promoted charring with Mg2+ as a Lewis acid, and increased wood char yield. MCH also released Cl· free radical and HCl at 167 °C, which easily coordinated with combustion reaction radical, and slowed down, even inhibited, the combustion chain reaction.
Yukihiro Kiuchi - One of the best experts on this subject based on the ideXlab platform.
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Increase in flame retardance of glass-epoxy laminates without halogen or phosphorous compounds by simultaneous use of Incombustible-Gas generator and charring promoter
Journal of Applied Polymer Science, 2006Co-Authors: Yukihiro Kiuchi, Nagashima Hiroaki, Miwa TakashiAbstract:Highly flame-resistant glass-epoxy laminates without flame-retarding additives such as halogen and phosphorous compounds have been developed to overcome environmental problems caused by these additives. The laminates consist mainly of a self-extinguishing epoxy-resin compound (phenol aralkyl), an Incombustible-Gas generator (amino-triazine-novolac hardener: ATN hardener), and inorganic materials such as a charring promoter (zinc molybdate on talc: ZMT) and a limited amount of harmless metal hydroxide (aluminum trihydroxide: ATH). They are highly flame-resistant and have other beneficial characteristics, including soldering-heat resistance, humidity resistance, electronic properties, and processing advantages. These qualities make them applicable enough to replace the FR-4 type printed wiring boards (PWBs) that are widely used today. Simultaneously using the ATN hardener and ZMT in the laminates, including the epoxy-resin compound and ATH, greatly improved their flame retardance. We then reduced the amount of ATH to obtain even better flame retardance in the laminates. This reduction of the ATH, consequently, improved other practical characteristics such as soldering-heat resistance, humidity resistance, and electronic properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3367–3375, 2006
Yu Bai-qiu - One of the best experts on this subject based on the ideXlab platform.
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Advancement in Preparation and Study on Flame Retardance Mechanism of Intumescent Flameproof Coatings
Chemistry and Adhesion, 2011Co-Authors: Yu Bai-qiuAbstract:The intumescent flameproof coating is a kind of popular flameproof coating at home and abroad,it has the ability that can rapidly expand to form a stable thicker sponginess carbonaceous layer when subject to flame or at high temperature,which can effectively retard external heat source,meanwhile,the Incombustible Gas is formed,so that it has the flameproof and flame retardance properties.In recent years,more and more attention has been attracted to the intumescent flameproof coating.The preparation and mechanism of intumescent flameproof coating is summarized in detail.
