| 摘要: |
| 采用高分子增韧剂聚乙二醇（PEG）与含阻燃元素的硼酸（BA）进行反应，制得阻燃增韧剂聚乙二醇硼酸酯（PEGB）.研究了反应温度、共沸剂用量和物料摩尔比对合成工艺的影响，确定了最佳反应条件.以红外光谱（FTIR）表征了PEGB的分子结构.将PEGB引入酚醛树脂制得了改性酚醛泡沫（PF/PEGB）.酚醛泡沫的性能测试结果表明：PEGB改性酚醛泡沫的机械强度要高于纯酚醛泡沫，且阻燃性能优于PEG改性酚醛泡沫；其中PEGB400的改性效果最好，其改性酚醛泡沫的弯曲强度达0189MPa，压缩强度达0108MPa，极限氧指数（LOI）为380%，垂直燃烧等级为V0，满足建筑保温材料的性能要求. |
| 关键词: 聚乙二醇硼酸酯 阻燃增韧剂 酚醛泡沫 建筑保温材料 |
| DOI：103969/j.issn1007 9629201603016 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（21174106，U1205114/L11） |
|
| Synthesis and Characterization of a Flame Retardant Toughening Agent Containing Boron for Phenolic Foams |
|
LIU Lin1, FU Mingtao2
|
|
1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804,China;2.School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
|
| Abstract: |
| A flame retardant toughening agent, polyethylene glycol borate(PEGB), was synthesized from the esterification reaction between polymer toughening agent of polyethylene glycol(PEG) and flame retardant boric acid. Effects of reaction temperature, entrainer amount and PEG/BA molar ratio were studied, and the optimum reaction conditions were determined. The structure of PEGB was characterized by Fourier transform infrared spectroscopy(FTIR). Phenolic foams(PF) modified by PEGB with different relative molecular masses were prepared. The results of foam property tests show that the mechanical strengths of PF/PEGB are higher than those of pure PF, and the flame retardancy of PF/PEGB is also improved compared with PF/PEG. Particularly, PEGB400 performs best for increasing flexural strength and compressive strength to 0189，0108MPa respectively, keeping the limited oxygen index(LOI) to 380%, and achieving UL 94 rating of V0. Such performance is qualified for thermal insulation building materials. |
| Key words: polyethylene glycol borate(PEGB) flame retardant toughening agent phenolic foam thermal insulation building material |
