Alternative instruments and accessories leading to similar results:
- SALD -2300 with BC-23
Background
Coatings are an ideal protection for different kind of materials. They protect against moisture, UV radiation, rust and other influences. Additives can enhance the properties of the coating, e.g. the scratch resistance. Like in this application note these additives can be made out of non-polar surface modified silicon dioxide nanoparticles.
Measurement
The tests have been conducted following the guidelines of the ISO 527 (JIS K 7161) regulation. The shape and size of the specimens are shown in Fig. 1. The tests speed has been set to 1 mm/min for a strain below 0.3% and 50 mm/min when the strain reached the value of 0.3%. The strain interval for the calculation of the Elastic modulus E was 0.05%~0.25% (Fig. 2).
The tensile strength Om is defined as the highest stress recorded during the test. Accordingly, in the case that the tested material exhibits a clear yielding point, the tensile strength σm becomes the stress in correspondence of the yielding strain, Oy.
Discussion
The SALD-7101 in combination with BC-71 can successfully be used to measure nanoparticles respectively additives for coatings.
Results
Above graph shows a volume based particle size distribution of two different samples. The table contains the corresponding measurement results. Sample 1-5 and sample 6-10 are two independent samples. The mean diameter of the first sample is 22nm the mean diameter of the second 52nm.
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