In order to improve the adhesion of the middle frequency magnetic sputtered zirconium coating on a polyurethane film,an anode layer source was used to pretreat the polyurethane film with nitrogen and oxygen ions.SEMs ...In order to improve the adhesion of the middle frequency magnetic sputtered zirconium coating on a polyurethane film,an anode layer source was used to pretreat the polyurethane film with nitrogen and oxygen ions.SEMs and AFM roughness profiles of treated samples and the contrast groups were obtained.Besides,XPS survey spectrums and high resolution spectrums were also investigated.The adhesion test revealed that ion bombardment could improve the adhesion to the polyurethane coating substrate.A better etching result of oxygen ions versus nitrogen predicts a higher bonding strength of zirconium coating on polyurethane and,indeed,the highest bonding strengths are for oxygen ion bombardment upto 13.3 MPa.As demonstrated in X-ray photoelectron spectroscopy,the oxygen ion also helps to introduce more active groups,and,therefore,it achieves a high value of adhesion strength.展开更多
以TDI(甲苯二异氰酸酯)和PPG(聚氧化丙烯二醇)为基本原料、无水甲醇和无水乙醇为复配溶剂和BDO(1,4-丁二醇)为交联剂,制备出绿色环保型PU(聚氨酯)胶粘剂,并着重探讨了PU的结构,反应温度和反应时间等对胶粘剂性能的影响。研究结果表明:...以TDI(甲苯二异氰酸酯)和PPG(聚氧化丙烯二醇)为基本原料、无水甲醇和无水乙醇为复配溶剂和BDO(1,4-丁二醇)为交联剂,制备出绿色环保型PU(聚氨酯)胶粘剂,并着重探讨了PU的结构,反应温度和反应时间等对胶粘剂性能的影响。研究结果表明:当PU中硬段质量分数为45%、反应温度为80℃、反应时间约3 h、加入扩链剂后的反应温度和反应时间分别为60℃和2 h左右时,制得的胶粘剂具有相对最好的综合性能(剥离强度为0.88 k N/m、剪切强度为0.19 k N/m,并且胶液均匀透明、稳定不分层);此外,该PU胶粘剂以混合醇为溶剂,故不含对人体有害的游离—NCO,是一种环保型的胶粘剂。展开更多
文摘In order to improve the adhesion of the middle frequency magnetic sputtered zirconium coating on a polyurethane film,an anode layer source was used to pretreat the polyurethane film with nitrogen and oxygen ions.SEMs and AFM roughness profiles of treated samples and the contrast groups were obtained.Besides,XPS survey spectrums and high resolution spectrums were also investigated.The adhesion test revealed that ion bombardment could improve the adhesion to the polyurethane coating substrate.A better etching result of oxygen ions versus nitrogen predicts a higher bonding strength of zirconium coating on polyurethane and,indeed,the highest bonding strengths are for oxygen ion bombardment upto 13.3 MPa.As demonstrated in X-ray photoelectron spectroscopy,the oxygen ion also helps to introduce more active groups,and,therefore,it achieves a high value of adhesion strength.
文摘以TDI(甲苯二异氰酸酯)和PPG(聚氧化丙烯二醇)为基本原料、无水甲醇和无水乙醇为复配溶剂和BDO(1,4-丁二醇)为交联剂,制备出绿色环保型PU(聚氨酯)胶粘剂,并着重探讨了PU的结构,反应温度和反应时间等对胶粘剂性能的影响。研究结果表明:当PU中硬段质量分数为45%、反应温度为80℃、反应时间约3 h、加入扩链剂后的反应温度和反应时间分别为60℃和2 h左右时,制得的胶粘剂具有相对最好的综合性能(剥离强度为0.88 k N/m、剪切强度为0.19 k N/m,并且胶液均匀透明、稳定不分层);此外,该PU胶粘剂以混合醇为溶剂,故不含对人体有害的游离—NCO,是一种环保型的胶粘剂。