Evaluation of Thickness of Degraded Layer of Polymer Surface


Nanoindentation method

It is possible to use the nanoindentation method to obtain information on dynamic viscoelasticity in the depth direction (nm) at various temperature levels to determine to what extent the degradation of various polymer materials has proceeded owing to the effects of heat, light, etc.

Determination of dynamic viscoelasticity by the nanoindentation method

Determination of dynamic viscoelasticity is carried out by checking the phase difference (responsiveness) by adding a dynamic signal to the indentor. This technique can also be applied to thin films of thickness of nm order which has been impossible with the conventional solid viscoelasticity determination method.

Evaluation of thickness of a degraded layer of the polyolefin sheet surface layer

Dynamic viscoelasticity was measured at temperatures of 40, 80 and 120°C by irradiating vacuum-ultraviolet light onto PP press-molded sheet to determine to what depth from the surface layer the dynamic viscoelasticity had been affected.

It was estimated that degradation had proceeded to 100 nm at which Tanδ had changed abruptly.

Search Number 6O002

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