Advances in Materials Science and Engineering / 2015 / Article / Tab 2

Research Article

Adhesion Strength of Cellulosic Varnish Coated Wood Species as Function of Their Surface Roughness

Table 2

Statistical analysis of the roughness and adhesion strength test results.

SourceSum of squaresdfMean square valueSignificance level

Surface roughness
Effect of species () 519.5763173.1927.814***
Effect of grain orientation ()313.3611313.36114.137***
Effect of sanding ()4197.22614197.226189.359***
340.6983113.5665.124**
867.983289.32313.053***
35.058135.0581.582NS
231.369377.1233.479*
Error8511.53338422.165
Total446911.543400

SourceSum of squaresdfMean square valueSignificance level

Adhesion strength
Effect of species ()5.65031.88330.206***
Effect of grain orientation ()0.89610.89614.367***
Effect of sanding ()0.74610.74611.965***
0.52030.1732.783*
0.06430.0210.343NS
0.18310.1832.933NS
0.08130.0270.431NS
Error18.953304
Total1374.395320

NS: nonsignificant; significant at the level; significant at the 0.01 level; significant at the level.

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