SIPM对高折射率聚酯树脂物理性能和乳化性能的影响

Effect of SIPM on Physical and Emulsifying Properties of High Refractive Polyester

以间苯二甲酸二甲酯-5-磺酸钠(SIPM)、自制聚醚多元醇、2,6-萘二甲酸二甲酯(NDC)和乙二醇为原料,通过熔融缩聚的方法制得了系列聚酯树脂。通过改变SIPM的用量,研究了SIPM含量变化对树脂性能的影响。用核磁共振仪、红外光谱分析仪、凝胶渗透色谱仪、差示扫描量热仪、热重分析仪、阿贝折光仪和粒度分析仪对产物结构、性能及乳化特性进行了表征。结果表明,随着聚酯树脂中SIPM含量的增加,聚酯的玻璃化转变温度明显升高,热稳定性良好,但折射率略有降低,从1.606 3降低到1.600 4;聚酯树脂具有易乳化特性,SIPM用量越少,乳液透明性越好,水乳液放置100 d后仍具有优异的分散性和稳定性。

A series of polyester resins were prepared by a melt polycondensation method using dimethyl5sodium sulfoisophthalate(SIPM),selfmade polyether polyol,dimethyl 2,6naphthalene dicarboxylate(NDC)and ethylene glycol as raw materials.The effect of SIPM content on the properties of resultant polyester resins was investigated,and the structure and physical and emulsifying properties of polyester resins were characterized by nuclear magnetic resonance,Fouriertransform infrared spectroscopy,gel permeation chromatography,differential scanning calorimetry,thermogravimetric analysis,Abbe refractometer and particle size analyzer.The results indicated that the glass transition temperature of the polyester resins increases with the increase of SIPM content.The polyester resins exhibited a high thermal stability,but their refractive index was reduced slightly from 1.606 3 to 1.600 4.The polyester resins could be easily emulsified by Tween80,and the lower the concentration of the emulsifier,the better the transmittance of the emulsions.The polyester aqueous emulsions showed excellent dispersion and stability after being stored for 100 days.