丙酮含量对氨酯基粘接体系性能影响的研究

The influence of acetone ratio on the properties of the polyurethane adhesive system

目的:以氨基甲酸乙酯二甲基丙烯酸酯(UDMA)作为氨酯基粘接体系基质,以丙酮为溶剂,研究丙酮添加比例对UDMA性质的影响。方法:用UDMA与除水丙酮按照质量分数为100∶0(对照组);80∶20(A组);50∶50(B组);20∶80(C组)进行配置,采用傅里叶红外光谱法检测各组红外光谱,研究其中的氢键变化,并测定碳碳双键转化率;采用LVDV-1粘度计对各组进行粘度测定。结果:随着丙酮含量的增加,氢键含量降低;对照组、A、B、C组粘度分别为22.975 Pa·s、16.675 Pa·s、1.7Pa·s和0.017 Pa·s(P<0.05);双健转化率分别为68.875%、68.1%和53.3%和0%。对照组与A组间无统计学差异(P>0.05),对照组与B组,A组与B组间转化率均具有统计学差异(P<0.05)。结论:丙酮含量对氨酯基粘接体系的氢键含量、粘度、双键转化率都有影响。在配制氨酯基粘接体系时,丙酮含量应控制在50%以下。

Objective： To study the relationship between the acetone ratio and the property of the UDMA adhesive system with Di-urethane di-methaerylate （UDMA） as the matrix of the urethane based adhesive system and with acetone as solvent. Methods： UDMA and purified acetone were mixed in accordance with the mass fraction of 100 ： 0 （control group） ; 80 ： 20 （group A） ; 50 ： 50（ group B） and 20 ： 80 （ group C） respectively, Fourier transform infrared spectroscopy was used to detect the hydrogen bond, LVDV- 1 viscometer was used to detect the viscosity of the samples. Double bond conversion（DC） was also tested by FTIR. Results： With the increase of acetone content, the hydrogen bond decreased. The viscosity of the control group, group A, B and C was 22. 975 Pa · s, 16. 675 Pa · s, 1.7 Pa · s and 0. 017 Pa · s respectively（P 〈 0.05） ; the double bond conversion rate was 68. 875% , 68.1% , 53.3% and 0% , respectively（ between control group and group A, P 〉 0.05 ）. Furthermore, the conversion rate between the A group and the B group, control group and the B group had statistical difference （ P 〈 0.05 ; between group B and A or control, P 〈 0.05 ）. Conclusion ： The content of acetone has an effect on the hydrogen bond content, viscosity and double bond conversion rate of the urethane bonding system. Acetone content should be controlled below 50% when preparing urethane bonding system.