Scratch behavior of nano-alumina/polyurethane coatings

被引：36

作者：

Sung, Li-Piin ^{[1
]}

Comer, Jeffrey ^{[1
,2
]}

Forster, Aaron M. ^{[1
]}

Hu, Haiqing ^{[1
]}

Floryancic, Bryce ^{[2
]}

Brickweg, Lukas ^{[2
]}

Fernando, Raymond H. ^{[2
]}

机构：

[1] Natl Inst Stand & Technol, Polymer Mat Grp, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USA

[2] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA

来源：

JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH | 2008年 / 5卷 / 04期

关键词：

Glass transition temperature; Laser scanning confocal microscopy; Mechanical properties; Nanoindentation; Nanoparticles; Scratch behavior; Surface morphology;

D O I：

10.1007/s11998-008-9110-z

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Incorporating metal-oxide nanoparticles such as nano-alumina and nano-silica into polymer coatings to enhance mechanical durability is widely utilized in the current antiscratch and mar technologies. In this article, a quantitative study of the effect of a nano-alumina additive on the surface mechanical properties and scratch behavior of a two-part polyurethane coating is reported. An instrumented indenter with a conical diamond tip is used to measure surface mechanical properties (modulus and hardness) and to perform scratch tests, over a wide range of scratch loads. The scratch behavior in terms of the onset of elastic-plastic transition and scratch morphology were characterized by laser scanning confocal microscopy. The scratch results were correlated to the surface mechanical properties and relevant bulk material properties to understand the overall scratch behavior of the coatings. The results show that the scratch behavior of the coatings depends strongly on the concentration of nano-alumina.

引用

页码：419 / 430

页数：12

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