Mechanical Properties and Flame Retardancy of Rigid Polyurethane Foams Containing SiO2 Nanospheres/Graphene Oxide Hybrid and Dimethyl Methylphosphonate
Mechanical Properties and Flame Retardancy of Rigid Polyurethane Foams Containing SiO2 Nanospheres/Graphene Oxide Hybrid and Dimethyl Methylphosphonate
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DOI：
10.1080/03602559.2017.1354251
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发表时间：
2018-01
影响因子：
--
通讯作者：
Zhengzhou Wang;Xiaoyan Li
中科院分区：
文献类型：
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作者：
Zhengzhou Wang;Xiaoyan Li
摘要采用SiO2纳米球/氧化石墨烯杂化材料与含磷阻燃剂甲基膦酸二甲酯复合制备了无卤阻燃硬质聚氨酯泡沫塑料。研究了含甲基膦酸二甲酯和SiO2纳米球/氧化石墨烯的阻燃硬质聚氨酯泡沫塑料的阻燃性能、力学性能和热性能。结果表明，与纯聚氨酯泡沫和甲基膦酸二甲酯改性泡沫相比，甲基膦酸二甲酯与SiO2纳米球/氧化石墨烯复合可显著提高聚氨酯泡沫的阻燃性能和力学性能。形态学研究表明，SiO2纳米球/氧化石墨烯部分取代甲基膦酸二甲酯可使甲基膦酸二甲酯改性硬质聚氨酯泡沫的泡孔尺寸变小，泡孔尺寸更加均匀。图形摘要
ABSTRACT Halogen-free flame-retardant rigid polyurethane foams were prepared using the combination of SiO2 nanospheres/graphene oxide hybrid and a phosphorus-containing flame retardant, dimethyl methylphosphonate. The flame retardancy, mechanical, and thermal properties of flame-retardant rigid polyurethane foams containing dimethyl methylphosphonate and SiO2 nanospheres/graphene oxide were investigated. The results demonstrated that the combination of dimethyl methylphosphonate and SiO2 nanospheres/graphene oxide enhanced flame retardant and mechanical properties of rigid polyurethane foam greatly compared with pure rigid polyurethane foam and dimethyl methylphosphonate-modified foam. Morphological study indicated that the partial substitution of dimethyl methylphosphonate with SiO2 nanospheres/graphene oxide led to smaller cell sizes and more uniform cell sizes of dimethyl methylphosphonate-modified rigid polyurethane foams. GRAPHICAL ABSTRACT