论文部分内容阅读
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0.189 MPa,压缩强度达0.108 MPa,极限氧指数(LOI)为38.0%,垂直燃烧等级为V0,满足建筑保温材料的性能要求.
Polyethylene glycol (PEG), a polymer toughener, was reacted with boric acid (BA) containing flame retardants to prepare polyethylene glycol borate (PEGB) as flame retardant toughening agent. The reaction temperature The optimum reaction conditions were determined by the amount of the initiator and the molar ratio of the material to the synthesis process.The molecular structure of PEGB was characterized by FTIR.The modified phenolic foam (PF / PEGB) was prepared by introducing PEGB into phenolic resin. The test results of phenolic foam showed that the mechanical strength of PEGB modified phenolic foam was higher than that of pure phenolic foam, and the flame retardance was better than that of PEG modified phenolic foam. The modification effect of PEGB400 was the best, the modified phenolic foam Flexural strength of 0.189 MPa, compressive strength of 0.108 MPa, limit oxygen index (LOI) of 38.0%, and vertical burn rating of V0, meeting the performance requirements of building insulation materials.