The activity of waterborne polyurethane and its effect on the properties of composite materials
XIAO Fang 1， 2， 3， WANG Lei1， 3， SUN Jianming1， 2， HU Qinglan1， 2， WU Qiangxian3， WENG Fangqing1， 2， 3
(1.College of Chemistry and Life Sciences， Hubei University of Education， Wuhan 430205， China； 2.Hubei Key Laboratory of Purification and Application of Plant Anti-cancer Active Ingredients， Hubei University of Education， Wuhan 430205， China； 3.College of Chemistry， Central China Normal University， Wuhan 430079， China)
Abstract：In this paper， unblocked water-based polyurethane (WPU) was synthesized and its preservation time was controlled for its activity. Then， WPU and starch were mixed to prepare a series of water-based polyurethane-starch composite materials (WCS). Finally， the basic properties of the WCS were characterized to explore the feasibility of unblocked WPU as a reactive compatibilizer. Firstly， the variation tendency of the activity of the waterborne polyurethane over time was explored. It's found that the unblocked WPU remained reactive within 3 days but showed inactivation after 3 days. Then， by exploring the basic properties of WCS composites prepared from WPU with different activities， it is revealed that only active WPU have －NCO reactive group， indicationg that the interface of the prepared composite system has good compatibility. This is due to the formation of urethane bonds and partial hydrogen bonds between the －NCO of WPU and the －OH of starch. The use of WPU as a reactive compatibilizer for composite materials is a new attempt， and the operation process is simple. In addition， it is environmentally friendly and overcomes the shortcomings of traditional polyurethanes that require the addition of organic solvents. This work also lays a foundation for the application of reactive WPU in composite materials.
肖 芳,王 磊,孙建明,胡庆兰,伍强贤,翁方青,. 水性聚氨酯活性及其对复合材料性能影响的探究[J]. 华中师范大学学报(自然科学版), 2022, 56(4): 656-661.
XIAO Fang,WANG Lei,SUN Jianming,HU Qinglan,WU Qiangxian,WENG Fangqing,. The activity of waterborne polyurethane and its effect on the properties of composite materials. journal1, 2022, 56(4): 656-661.
2022, Vol. 56 
