在以氢氧化钠为催化剂的条件下,改性剂对苯二甲醇先与苯酚高温条件下反应,后与多聚甲醛进行加成缩聚,再经过发泡固化后得到改性酚醛泡沫。通过傅里叶变换红外光谱、核磁共振波谱的氢谱对改性酚醛树脂表征,并对改性酚醛泡沫进行了表观密度、吸水率、粉化度、热重和氧指数等测试,结果表明:成功合成了改性酚醛树脂,且改性酚醛泡沫较普通酚醛泡沫相比吸水率及粉化度下降,迅速失重温度、残炭率及泡沫的极限氧指数提高,耐热性能得到了改善。
The p-phenylenediethanol was used as a modifier.Under the condition of sodium hydroxide as a catalyst,it was first reacted with phenol under high temperature conditions,then added to polycondensation,and then modified to form a modified phenolic resin foam.The characteristics of the foam were characterized by fourier transform infrared spectroscopy,nuclear magnetic resonance spectroscopy hydrogen spectroscopy,apparent density,water absorption,pulverization degree,thermogravimetry and oxygen index.The foam was successfully synthesized,and the modified foam decreased water absorption and chalking degree compared with the common phenolic foam.The rapid weight loss temperature,the residual carbon ratio and the limiting oxygen index of the foam were improved,and the heat resistance was improved.
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基金资助
辽宁省重点研发计划指导计划项目(2017304004);沈阳市科技计划项目(17-206-8-00)
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