木质素基聚氨酯预聚体的合成与性能表征  

Preparation and Characterization of Lignin-based Polyurethane Prepolymer

作　　者：王勃[1,2] 刘文仓[1] 刘士琦[1] 孔宪志[1,2] 邸明伟[3] 

机构地区：[1]黑龙江省科学院高新技术研究院,黑龙江哈尔滨150040 [2]黑龙江省科学院石油化学研究院,黑龙江哈尔滨150040 [3]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《化学与粘合》2017年第3期185-188,共4页Chemistry and Adhesion

摘　　要：采用木质素与聚醚二元醇、异氰酸酯,制备出木质素基聚氨酯预聚体。对合成木质素基聚氨酯预聚体的温度和时间进行研究,并探讨木质素基聚氨酯预聚体的剪切强度、耐水性能及耐热性能,采用TG(热重分析)对木质素基聚氨酯预聚体进行了分析。结果表明:预聚体合成适宜的反应条件是温度80℃、反应时间为4h;预聚体在浸水7d后,木质素基聚氨酯预聚体(木质素与二元醇羟基物质的量比2∶1)增重为2.35%,在100℃热氧老化15d,断裂伸长率从576%下降到524%,拉伸强度从2.38MPa增至3.15MPa,经TG分析,木质素预聚体(木质素与二元醇羟基物质的量比2∶1)在500℃失重为85%,无木质素预聚体失重为97.9%。The lignin-based polyurethane prepolymer was prepared with lignin, isocyanate and polyether diols. The temperature and time for synthesizing lignin-based polyurethane prepolymer was studied and the shear strength, water resistance and heat resistance of the lignin-based polyurethane prepolymer were investigated. The polyurethane prepolymer was analyzed by TG. The results showed that the appropriate temperature and time for preparing prepolymer was 80℃ and 4h respectively. When the hydroxyl molar ratio of lignin to polyether diol was 2：1, the weight gain of lignin-based polyurethane prepolymer was 2.35% after immersion in water for 7 days, and the elongation at break decreased from 576% to 524%, and the tensile strength increased from 2.38MPa to 3.15MPa after the lignin-based polyurethane prepolymer was thermally oxidized at 100℃ for 15 days. The weight loss of lignin based prepolymer and lignin-free prepolymer was 85% and 97.9% respectively at 500℃ determined by TG.

关 键 词：聚氨酯 木质素 预聚体 性能 

分 类 号：TQ433.432[化学工程]