Abstract: The present invention provides a method of evaluating the neutron scattering length density, capable of accurately determining the neutron scattering length density. The present invention relates to a method of evaluating the neutron scattering length density of scatterers in a material, including determining the neutron scattering length density based on a scattering intensity curve obtained by neutron scattering measurement, with use of a scattering intensity curve obtained by X-ray scattering measurement.

Abstract: The present invention provides a method for evaluating the rebound resilience, hardness, or energy loss of polymer materials, capable of sufficiently evaluating the difference in performance between samples with excellent measurement accuracy. The present invention relates to a method for evaluating the rebound resilience, hardness, or energy loss of a polymer material, including irradiating the polymer material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

Abstract: The present invention provides a method for evaluating energy loss in a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy; a method for evaluating chipping resistance of a polymeric material, wherein the method provides evaluation in a short period of time and at low cost with excellent measurement accuracy; and a method for evaluating abrasion resistance of a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy. The present invention relates to methods for evaluating energy loss, chipping resistance, and abrasion resistance of a polymeric material, and the methods include irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

Abstract: An object of the present invention is to improve the abrasion resistance of a golf ball that uses a polyurethane as a resin component for a cover. Another object of the present invention is to improve the shot feeling of a golf ball that uses a polyurethane as a resin component for a cover. The present invention provides a golf ball comprising a core; and a cover covering the core, wherein the cover contains a polyurethane elastomer as a resin component, and the polyurethane elastomer contains a polyol component and a polyisocyanate component and does not contain a chain extender.

Abstract: An object of the present invention is to improve the abrasion resistance of a golf ball that uses a polyurethane as a resin component for a cover. Another object of the present invention is to improve the shot feeling of a golf ball that uses a polyurethane as a resin component for a cover. The present invention provides a golf ball comprising a core; and a cover covering the core, wherein the cover contains a polyurethane elastomer as a resin component, and the polyurethane elastomer contains a polyol component and a polyisocyanate component and does not contain a chain extender.