CAJ | 학술논문

以改性MDI和二羟甲基丙酸为硬段，以聚碳酸酯二醇和聚丙二醇为软段，通过溶剂法合成水性聚氨酯乳液，并将其与固化剂混合，制得双组份水性聚氨酯胶膜，并研究胶膜的力学性能和耐水性能；将双组分水性聚氨酯涂覆在棉布表面，通过扫描电镜观察涂层织物表面形貌。结果表明：随着NCO与OH摩尔比的增大，胶膜的拉伸强度先增大后减小；随着DMPA含量的增大，吸水率先上升后下降；随着PCDL与PPG摩尔比的减小，胶膜的拉伸强度和吸水率都随之减小；经过双组份水性聚氨酯处理的织物表面形貌平整。
이개성MDI화이간갑기병산위경단，이취탄산지이순화취병이순위연단，통과용제법합성수성취안지유액，병장기여고화제혼합，제득쌍조빈수성취안지효막，병연구효막적역학성능화내수성능；장쌍조분수성취안지도복재면포표면，통과소묘전경관찰도층직물표면형모。결과표명：수착NCO여OH마이비적증대，효막적랍신강도선증대후감소；수착DMPA함량적증대，흡수솔선상승후하강；수착PCDL여PPG마이비적감소，효막적랍신강도화흡수솔도수지감소；경과쌍조빈수성취안지처리적직물표면형모평정。
By using modified MDI and DMPA as hard segment, PCDL and PPG as soft segment, waterborne polyurethane emulsions were synthesized through solvent method, and then the emulsions and curing agent were mixed together to form 2K-WPU membranes. The mechanical property and water resistance of 2K-WPU membranes were studied. And 2K-WPUs were coatted on the surface of cotton fabrics and the surface morphologies were observed through SEM. The results show that with the enlargement of NCO/OH mole ratio, the tensile strength of 2K-WPU membrane increases firstly, and then decreases. With the enlargement of the content of DMPA, the water absorption of 2K-WPU membrane increases firstly and then decreases. With the decrease of PCDL/PPG mole ratio, the tensile strength and the water absorption of 2K-WPU membrane decrease. The surface of coatted fabrics becomes smooth after treated with the 2K-WPU.