低分子量双端羟基聚苯醚的合成研究

通过2,6-二甲基苯酚和四甲基双酚A氧化共聚合成低分子量聚苯醚,研究了单体配比、催化剂添加比例对聚合反应的影响,对反应产物进行了红外光谱、比浓黏度、分子量、产率、热失重、差示扫描量热法(DSC)、羟值等性能的表征与测试,成功制备出了分子量范围在1 500～3 000具有双端羟基的聚苯醚并确定了最佳合成工艺,产率均在70...

Study on Synthesis of Low Molecular Weight Double Terminal Hydroxyl Polyphenylene Ether

Through the oxidative copolymerization of 2,6-dimethylphenol and tetramethyl bisphenol A into low molecular weight polyphenylene ether,the effect of monomer ratio and catalyst addition ratio on the polymerization reaction was studied.The properties of reaction products were characterized and tested by infrared spectroscopy,specific viscosity,molecular weight,yield,thermal weight loss,differential scanning calorimetry(DSC),hydroxyl value and so on.The polyphenylene ether with the molecular weight from 1500~3000 is successfully prepared and the optimal synthesis technology is determined with the yield of 70%.The results show that the monomer ratio has the greatest impact on the molecular weight of the polyphenylene ether product,and the molecular weight of the polyphenylene ether product increases with the increase of n DMP∶n TMBPA.The catalyst addition ratio has the greatest impact on the thermal weight loss of the polyphenylene ether product,and the thermal weight loss decreases with n Cu∶n DMP decreasing.When n Cu∶n DMP=0.004,the thermal weight loss performance of polyphenylene ether product is the best,which is 0.83%.