电火花引发丙烯酰胺接枝BOPP薄膜的研究

采用FT-IR,ESCA,试样与水接触角和接枝率的测定探索了电火花用于引发丙烯酰胺(AAM)在BOPP薄膜表面接枝聚合反应的方法,研究了接枝BOPP薄膜的表面结构和亲水性能。结果表明,电火花能有效地引发AAM在BOPP薄膜表面的接枝聚合反应,随着电火花处理时间和接枝反应时间的延长,AAM在BOPP薄膜表面的接枝率增大。电火花处理10min,BOPP薄膜在70℃,20%(质量分数)的AAM水溶液中反应1h,接枝率高达2.06%。接枝后BOPP薄膜与水的接触角显著下降,亲水性能得到明显改善。

Surface graft copolymerization of acrylic amide onto BOPP film through corona discharge

The corona discharge technique was explored as a means of forming chemically active sites onto the BOPP film surface, the active species thus prepared at atmospheric pressure in air was exploited to induce subsequently copolymerization of acrylic amide (AAM) onto BOPP film in aqueous solution. The surface structure and the hydrophilic property of the grafted BOPP film were studied through FT-IR, ESCA and contact angle measurement. The results show that with corona discharge and copolymerization time, the grafting degree of AAM onto BOPP film increases. The grafting degree could reach a pretty high value of 2.06% by weight under the conditions of corona discharge 10 min and copolymerization reaction time 1h in 20% AAM aqueous solution at 70℃. The contact angle of the grafted BOPP film with water is much lower, and the hydrophilic property can be improved quite a lot as compared with that of ungrafted BOPP film.