Deterioration analysis method and chemical state measurement method
The present invention provides a deterioration analysis method capable of analyzing in detail deterioration of a polymer material, and in particular deterioration in the surface condition of a polymer material with low conductivity. The present invention relates to a deterioration analysis method including irradiating a polymer material with a metal coating having a thickness of 100 Å or less formed thereon, with high intensity X-rays, and measuring X-ray absorption while varying the energy of the X-rays, to analyze deterioration of the polymer.
1. A deterioration analysis method, comprising irradiating a tire rubber composition with a metal coating having a thickness of 100 Å or less formed thereon, with high intensity X-rays, and measuring X-ray absorption while varying the energy of the X-rays, to analyze deterioration of the tire rubber composition.
2. The deterioration analysis method according to claim 1 , wherein the metal coating is a vapor deposited metal film.
3. The deterioration analysis method according to claim 1 , wherein the tire rubber composition has a carbon black content of 50 parts by mass or less per 100 parts by mass of a rubber component of the tire rubber composition.
4. A deterioration measurement method, comprising removing blooms on a surface of a tire rubber composition and then applying an X-ray-based surface analysis method to measure deterioration on the surface of the tire rubber composition.
5. The deterioration measurement method according to claim 4 , examining a change in deterioration on the surface of the tire rubber composition.
6. The deterioration measurement method according to claim 4 , wherein the blooms on the surface of the tire rubber composition are removed using a solvent.
7. The deterioration measurement method according to claim 6 , wherein the solvent is an organic solvent.
8. The deterioration measurement method according to claim 4 , wherein the blooms on the surface of the tire rubber composition are removed using a solvent extraction method.