高阻燃聚苯乙烯复合保温板阻燃体系研究

发布时间：2018-06-22 03:25

本文选题：可发性聚苯乙烯 + 可膨胀石墨　；参考：《长安大学》2015年硕士论文

【摘要】：聚苯乙烯板材目前被广泛的用于建筑外墙保温领域,但聚苯乙烯(EPS)板易燃烧。目前EPS阻燃剂主要为含卤阻燃剂,燃烧时会产生大量有毒烟雾和气体,因此EPS的无卤阻燃研究显得非常重要。可膨胀石墨(EG)是一种新型的膨胀型阻燃剂,其具有阻燃性能优异、无卤环保等特点。EG与不同无卤阻燃剂协同阻燃是一种有效的无卤阻燃方法,尤其对阻燃EPS具有很好的应用前景。本文通过使用极限氧指数作为EPS保温板阻燃性能的测试指标,研究了无卤阻燃剂EG、A、C、D、E、FA、EP和IFR等阻燃剂对EPS保温板阻燃性能的影响,并进一步研究了EG与不同无卤阻燃剂在不同添加量之比对EPS保温板的协同阻燃效果,并探究了EG/A/C阻燃体系对EPS保温板阻燃效果和力学性能的影响,使用TG和SEM研究EG和EG/A/C对EPS保温板阻燃和协效阻燃的机理。主要结论有:(1)不同无卤阻燃剂中EG、阻燃剂A和阻燃剂C对EPS板材的阻燃效果最为显著,氧指数分别为26.2%、24.9%和23.8%,其余几种无卤阻燃剂对EPS保温板的氧指数提升有限。(2)EG与阻燃剂A和C协同阻燃EPS保温板时阻燃效果很显著,氧指数可达到28.5%和27.5%,其他无卤阻燃剂与EG的协同阻燃效果并不明显。(3)添加阻燃体系EG/A/C分别为15%/40%/5%,EPS保温板氧指数为33.5%,抗拉强度为0.1724MPa。(4)阻燃体系EG/A/C可以延后阻燃EPS体系的热失重温度并降低热失重速率,增加燃烧后膨胀炭层的稳定性和致密度,显著提升燃烧后的残炭量,此阻燃体系具有优异的阻燃效果。
[Abstract]:Polystyrene sheet is widely used in the field of exterior wall insulation, but the polystyrene (EPS) board is flammable. At present, the main flame retardants of EPS are halogen-containing flame retardants, which will produce a large number of toxic smoke and gases during combustion, so it is very important to study the halogen-free flame retardancy of EPS. Expandable graphite (EG) is a new type of intumescent flame retardant. EG has excellent flame retardancy and halogen-free environmental protection. EG and different halogen-free flame retardants are an effective non-halogen flame-retardant method. Especially, it has a good application prospect for flame retardant EPS. In this paper, the flame retardancy of EPS insulation board was studied by using the limiting oxygen index (Oi) as the test index, and the effects of flame retardants, such as EPS flame retardant (EGN), EFAF / EP and IFR, on the flame retardancy of EPS insulation board were studied. The synergistic flame-retardant effect of EG with different ratio of non-halogen flame retardant on EPS insulation board was further studied, and the effect of EGR / A / C flame retardant system on the flame retardancy and mechanical properties of EPS insulation board was investigated. The flame retardancy and synergistic flame retardancy mechanism of EG and EGR / A / C on EPS insulation board were studied by TG and SEM. The main conclusions are as follows: (1) among different halogen free flame retardants, flame retardant A and flame retardant C are the most effective flame retardants for EPS sheets. The oxygen index of the other halogen-free flame retardants on the EPS insulation board is limited. (2) the flame retardant effect of EG combined with flame retardant A and C on the EPS insulation board is very significant. The oxygen index can reach 28.5% and 27.5% respectively. The synergistic flame retardant effect between other halogen-free flame retardants and EG is not obvious. (3) the flame retardant system EGR / A / C is 15 / 40 / 5 / 5, respectively. The oxygen index and tensile strength of EPS insulation board are 33.5 and 0.1724 MPA respectively. (4) the flame retardant system EGR / Ar / C can delay the flame retardant EPS system. Thermogravimetric temperature and reduce the rate of thermogravimetric loss, By increasing the stability and density of the intumescent carbon layer after combustion and increasing the amount of residual carbon after combustion, the flame retardant system has excellent flame retardant effect.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ325.2;TB332

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