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【急】 【求中译英】【有效期2009年6月9号23点30之前】
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机器翻译的坚决不要 钢结构具有强度大、自重轻、延展性好等优点，广泛应用于国内外建筑行业。但其耐火性能差，当温度到达其临界温度(540 ℃)时，就会丧失承载能力而导致垮塌。然而采用钢结构膨胀型防火涂料是一种有效的防火保护方法。影响涂料防火性能的因素很多，树脂基质作为防火涂料中的粘结剂就是非常重要的因素之一。 论文通过改变合成条件与组成配方，合成聚丙烯酸酯乳液，再加入防火助剂，制得防火涂料。使用熔体流动速率仪测量基料树脂的表观粘度。应用垂直燃烧法测定涂料耐火极限并观察防火涂料燃烧后炭化层的形貌。利用DSC、TGA分析法对涂料防火性能进行结果表征。 研究结果显示，合成采用去离子水，反应温度控制在85 ℃，控制好乳液合成中每段反应的搅拌强度，添加缓冲剂水溶液，引发剂用量占单体质量百分比为0.55 wt%，使用阴离子乳化剂与非离子表面活性剂复配的方法，可以得到稳定性良好的聚丙烯酸酯乳液。通过增加硬单体与非离子表面活性剂的用量，控制引发剂用量占单体质量百分比为0.55 wt%，可以提高基料树脂的表观粘度，但仍不足以让树脂在发泡阶段有效地包覆发泡剂产生的气体从而形成良好的泡沫膨胀层。然而合成树脂的热分解温度能与脱水成炭催化剂、发泡剂的分解温度以及炭化剂的炭化温度之间有良好匹配，可以保证熔融体系的炭化，形成的炭化泡沫层比原涂层膨胀五倍以上，阻燃时间较长。 [ Last edited by 252304962 on 2009-6-9 at 09:58 ] |
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2楼2009-06-09 10:39:40
pingyamin
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zap65535(金币+25,VIP+0):久等！！ 12-23 15:45
zap65535(金币+25,VIP+0):补发金币！ 12-23 15:45
zap65535(金币+25,VIP+0):久等！！ 12-23 15:45
zap65535(金币+25,VIP+0):补发金币！ 12-23 15:45
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Steel has such advantages as great intensity, light weight, good ductility, etc, which are widely used in the construction industry both at home and abroad. However, poor performance against fire limits its use, when the temperature up to reach its critical temperature (540 ℃), it will lead to the loss of carrying capacity and collapse. However, it is an effective method of protection against fire when using intumescent fire-resistant coating of steel structure. Many factors impact the performance of fireproof coating , matrix resin ,which is the binder of fire retardant is very important. This Papers synthesize polyacrylate emulsion by changing the synthesis conditions and the composition , and then added the fire proof auxiliaries, so as to make fire-proof coating. Then we test the viscosity of the resin by Melt flow speed indicator. Test fire-resistant limit of the painting by Vertical combustion method and observe the burning layer morphology after the carbonization. Finally characterize the fire-proof ability of the painting through DSC, TGA analysis . The results showed that we can get polyacrylate emulsion with good stability using following conditions : deionized water, 85 ℃, good control of the stirring intensity of each reaction, add the buffer solution, initiator account for 0.55 wt% of the monomer, mix anionic emulsified agents with non-ionic surfactant . By increasing the amount of hard monomer and non-ionic surfactant , and make the amount of initiator take up 0.55 wt% of monomer, thus it can increase the apparent viscosity of the resin, However, the resin can’t rap the gas produced by foaming agent in foaming stage which will help to form a good a layer of intumescent foam. However , the thermal decomposition temperature of synthetic resin have a good match with the dehydration catalyst, the decomposition temperature of foaming agents, as well as carbonization temperature of the carbonization agents , which ensure the carbonization of the melting system. Thus the carbonized foam layer is five times thicker than original coating , so as to ensure long duration of fire resistance . |
3楼2009-06-09 14:22:36
jichongcml
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zap65535(金币+0,VIP+0):机器翻译 12-23 15:45
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Steel structure with intensity, light weight, good ductility, etc., are widely used in the construction industry at home and abroad. However, poor performance of its fire resistance, when the temperature to reach its critical temperature (540 ℃), it will lead to the loss of carrying capacity and collapse. However, the use of steel structure intumescent fire retardant coating is an effective method of fire protection. The impact of the fire performance of paint a number of factors, as a fire retardant coating resin matrix of the binder is one of the factors is very important. Papers by changing the synthesis conditions and the composition of formulations, synthetic polyacrylate emulsion, and then joined the auxiliary fire, a fire retardant coating system. The use of melt flow rate measured base material of apparent viscosity resin. Determination of the application of vertical burning fire-resistant paint coating limit and observe the fire burning layer morphology after the carbonization. The use of DSC, TGA analysis of the results of coating characterization of fire performance. The results showed that synthesis of the use of deionized water, the reaction temperature was controlled at 85 ℃, control the synthesis of emulsion the stirring intensity of each reaction, add the buffer solution, initiator monomer with the quality of the total percentage of 0.55 wt%, the use of anionic emulsified agents with non-ionic surfactant mixture of methods, can be a good stability of polyacrylate emulsion. By increasing the hard monomer and non-ionic surfactant the amount of initiator used to control the quality of the total percentage of monomer 0.55 wt%, can increase the resin-based material of apparent viscosity, But still not long enough for the resin in the foam blowing agent phase-coated to effectively produce the gas to form a good layer of bubble expansion. However, synthetic resin temperature of thermal decomposition into carbon with the dehydration catalyst, blowing agents, as well as the decomposition temperature of the carbonization carbonization agents have a good match between the temperature to ensure melting of the carbonization system, the formation of the carbonized foam layer coating than the original expansion of the five times, fire-retardant long time. |
4楼2009-06-09 16:32:54
幽雅百合
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钢结构具有强度大、自重轻、延展性好等优点，广泛应用于国内外建筑行业。但其耐火性能差，当温度到达其临界温度(540 ℃)时，就会丧失承载能力而导致垮塌。然而采用钢结构膨胀型防火涂料是一种有效的防火保护方法。影响涂料防火性能的因素很多，树脂基质作为防火涂料中的粘结剂就是非常重要的因素之一。 The steel structure has such advantages as great strength，light deadweight and good ductibility, etc，due to these advantages，it is extensively used in construction industry both at home and abroad. But it has a weak refractory performance，when the temperature gets to its critical point（540°C），the steel structure will collapse。However，applying expansible fire-retardant coating to steel structure is an effective way to protect it。The performance of fire-retardant coating can be affected by Many factors ，using resin matrix as binder is one of them。 |
5楼2009-06-09 16:33:20
dfq0730
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6楼2009-06-10 19:41:24
