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首页> 外文期刊>Journal of Applied Polymer Science >Adhesion properties of poly(methylmethacrylate-co-n-butylmethacrylate) copolymers in stent coatings
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Adhesion properties of poly(methylmethacrylate-co-n-butylmethacrylate) copolymers in stent coatings

机译：聚（甲基丙烯酸甲酯 - 二丁基丙烯酸甲酯）共聚物在支架涂层中的粘附性能

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This work explores the adhesion properties of polymer solutions and thin coatings obtained by different-composition poly(methylmethacrylate-co-n-butylmethacrylate) copolymers. Surface wettability, work of adhesion, and work of spreading are calculated for solutions. Increasing amounts of n-butylmethacrylate lead to higher values of work of adhesion, measured over two stent-like flat surfaces (AISI 316L and pyrolytic carbon). The same moiety induces the solution viscosity increase and the decrease of the work of spreading and allows obtaining more homogeneous coatings. Adhesion of thin coatings is tested in dry (cross-cut test) and wet (immersion) conditions. Adhesion tests of coatings obtained by solvent casting reflect thermodynamic parameters evaluated for solutions. Coatings show better strength in cross-cut tests and a prolonged adhesion in wet conditions by raising the n-butylmethacrylate fraction. The same trends are confirmed in commercial devices. In conclusion, the study of thermodynamic solution/substrate interactions can explain coating properties. The proposed approach is worthwhile to improve deposition procedures based on polymer solutions. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47814.
机译：该工作探讨了通过不同组合物聚（甲基丙烯酸甲酯 - 二丁基丙烯酸甲酯）共聚物获得的聚合物溶液和薄涂层的粘附性。对溶液计算表面润湿性，粘合性和展开的工作。增加数量的正丁基丙烯酸丁酯导致粘合性的更高值，在两个支架平坦的平坦表面（AISI 316L和热解）上测量。相同的部分诱导溶液粘度增加和散布工作的减少，并允许获得更均匀的涂层。在干燥（交叉试验）和湿（浸渍）条件下测试薄涂层的粘附性。通过溶剂铸造获得的涂层的粘附试验反射溶液评价的热力学参数。通过提高正丁基丙烯酸正甲基丙烯酸甲酯级分，涂层在横切试验中显示出更好的横切试验和延长的粘附性。在商业设备中确认了相同的趋势。总之，热力学溶液/底物相互作用的研究可以解释涂层性质。所提出的方法是值得改善基于聚合物溶液的沉积程序。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47814。

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