紫外光交联无卤阻燃聚烯材料及其性能研究

发布时间：2018-01-19 15:23

本文关键词： 乙烯-醋酸乙烯共聚物氢氧化镁紫外光交联力学性能无卤阻燃　出处：《合肥工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前阻燃领域绿色环保的呼声日益高涨,无卤阻燃剂金属氢氧化物,如氢氧化镁(MH)受到了越来越多的重视。然而使用MH进行无卤阻燃聚烯烃材料时存在着阻燃效率低、填充量高等缺点,严重影响了该阻燃剂的使用。本论文通过对无卤阻燃聚烯烃材料进行增效和紫外光交联的方法来改善复合材料的力学、阻燃和热性能。主要研究内容有：1.研究了气相二氧化硅(SiO2)和甲基乙烯基硅橡胶(MVQ)分别与MH以及三聚氰胺聚磷酸盐(MPP)在乙烯-醋酸乙酯共聚物(EVA)材料中的协同阻燃和力学增强作用。通过垂直燃烧(UL-94)、氧指数(LOI)等阻燃性能测试和力学性能测试数据对比发现适量的Si02更能够起到阻燃协效和力学增强的作用。2.研究了三聚氰胺氰尿酸盐(MCA)在EVA/MH复合材料体系中的协效阻燃作用。加入不同的相容剂的对EVA/MH/MCA复合材料性能进行优化,通过阻燃性能和力学性能测试表明,适量的马来酸酐接枝乙烯-乙酸共聚物(EVA-MA)对复合材料的性能优化最佳。3.研究了EVA/MH无卤阻燃复合材料在光引发剂下的紫外光交联及其相关性能。采用凝胶含量测定、热延伸试验、UL-94垂直燃烧试验、极限氧指数(LOI)、扫描电镜(SEM)、热重分析、拉伸测试等表征了复合材料的交联度、阻燃性能、热性能和力学性能。凝胶含量和热延伸测试结果证明紫外光可以对复合材料快速交联。光照交联后,材料的拉伸强度得到明显提高,断裂伸长率略有下降。LOI、TGA、SEM测试表明光交联的复合材料试样比未交联的试样具有更好的阻燃性能和热稳定性。4.对乙烯辛稀共聚物POE/MH无卤阻燃复合材料进行了紫外光交联研究。采用凝胶含量测定手段研究了POE/MH复合材料的光交联反应速率,优化了光引发剂配方体系,并研究了紫外光交联对POE/MH复合材料力学性能和热老化性能的影响。
[Abstract]:At present, the field of flame retardant green environmental protection voice is growing, halogen-free flame retardant metal hydroxide. For example, magnesium hydroxide (MH) has attracted more and more attention. However, the use of MH in halogen-free flame retardant polyolefin materials has the disadvantages of low flame retardancy efficiency and high filling amount. The use of the flame retardant has been seriously affected. In this paper, the mechanical properties of the composites were improved by enhancing the properties of halogen-free flame retardant polyolefin materials and ultraviolet crosslinking. Flame retardancy and thermal properties. The main contents of this study are as follows: 1. Gas phase silica (SiO2) and methyl vinyl silicone rubber (MVQ), MH and melamine polyphosphate (MPP), respectively. Synergistic Flame retardancy and Mechanical reinforcement in Ethylene-Ethyl Acetate Copolymer EVA. by Vertical Combustion (UL-94). The comparison of flame retardancy test and mechanical property test data shows that proper amount of Si02 can play a synergistic role in flame retardancy and mechanical enhancement. 2. Melamine cyanuric acid salt (melamine cyanuric acid salt) was studied. The synergistic flame-retardant effect of MCA) in EVA/MH composites. The properties of EVA/MH/MCA composites were optimized by adding different compatibilizers. The flame retardancy and mechanical properties were tested. Proper amount of maleic anhydride grafted ethylene-acetic acid copolymer EVA-MA). The UV crosslinking of EVA/MH halogen-free flame retardant composites under photoinitiator and its related properties were studied. The gel content was used to determine the properties of the composites. Thermal extension test, UL-94 vertical combustion test, limiting oxygen index (Oi), scanning electron microscope (SEM), thermogravimetric analysis (TGA) and tensile test (TGA) were used to characterize the crosslinking degree and flame retardancy of the composites. The results of thermal and mechanical properties, gel content and thermal extension test show that ultraviolet light can quickly crosslink the composite, and the tensile strength of the composite is obviously improved after light crosslinking. Elongation at break decreased slightly. SEM test showed that the photocrosslinked composite had better flame retardancy and thermal stability than the uncrosslinked composite. (4) the ethylene octyl copolymer POE/MH halogen-free flame retardant composite was crosslinked with ultraviolet light. The photocrosslinking reaction rate of POE/MH composites was studied by gel content measurement. The formulation of photoinitiator was optimized and the effects of UV crosslinking on mechanical properties and thermal aging properties of POE/MH composites were studied.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB332

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