Properties of Flame Retardancy and Low Toxicity of Siloxane Modified Vinyl Ester Resin Composites
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摘要: 对玻璃纤维增强的硅氧烷改性乙烯基树脂复合材料的成型工艺及力学、阻燃低毒性进行研究。研究发现,对厚度小于40 mm的层合板,使用一次成型的真空辅助成型工艺即可获得较好的形态,而厚度大于40 mm的层合板需使用二次成型方法。改性后的复合材料力学性能下降幅度在10%左右。从氧指数、低播焰、烟毒性、常温毒性、高温毒性等方面,对硅氧烷改性的乙烯基树脂复合材料的阻燃性和毒性进行研究,结果表明,磷、硅协同阻燃作用显著提高了该复合材料的阻燃性能,其氧指数从24.5%提高到38.0%,其低播焰性能够满足墙壁和天花板衬板的使用条件;硅氧烷化合物的低毒、低烟特性显著降低了该复合材料的烟毒性,其最大烟密度为189,毒性为低等毒性,满足密闭环境的使用要求。
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关键词:
- 硅氧烷改性乙烯基树脂 /
- 真空辅助成型 /
- 力学性能 /
- 阻燃性能 /
- 低毒性能
Abstract: The forming process, mechanical property, flame retardancy and low toxicity of the glass fiber reinforced siloxane modified vinyl resin composites are studied. It is found that when the thickness of the laminate is less than 40 mm, the composite material can be formed by vacuum assisted resin infusion(VARI) in the primary forming, and the formation is fine. When the thickness of the laminate is more than 40 mm, the composite material can be formed by VARI in the secondary forming. The mechanical properties of the modified composites decrease by less than 10%. The properties of flame retardancy and low toxicity of the siloxane modified vinyl resin composites are studied by oxygen index, low flame seeding, smoke toxicity, normal temperature toxicity and high temperature toxicity tests. The results show that the synergistic flame retardancy of the phosphorus and silicon significantly improves the flame retardancy of the composite, and that the oxygen index increases from 24.5% to 38.0%. The low flame retardancy can meet the service conditions of the wall and ceiling lining. The low toxicity and low smoke properties of the siloxane compounds significantly reduce the smoke and toxicity of the composites. The smoke density of the siloxane modified vinyl resin composites is 189, and its toxicity is low, which can be used in a closed environment. -
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