METHOD FOR EVALUATING ENERGY LOSS, CHIPPING RESISTANCE AND ABRASION RESISTANCE OF POLYMERIC MATERIAL

• US 20140140483A1
• Filed: 11/04/2013
• Published: 05/22/2014
• Est. Priority Date: 11/21/2012
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: KISHIMOTO, Hiroyuki, MASHITA, Ryo, MASUI, Tomomi
• Granted Patent: US 9,291,581 B2
• Time in Patent Office: Days
• US Class Current: 378/86
• CPC Class Codes: G01N 2223/1006 different radiations, e.g. X and alpha
• CPC Class Codes: G01N 2223/1016 X-ray
• CPC Class Codes: G01N 2223/106 neutrons
• CPC Class Codes: G01N 2223/623 plastics
• CPC Class Codes: G01N 23/201 by measuring small-angle scattering
• CPC Class Codes: G01N 23/2073 using neutron detectors neutron spectrometry G01T3/00

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.

Claims

1. A method for evaluating energy loss in a polymeric material, comprising:

irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

2. The method according to claim 1,

wherein the X-ray scattering measurement is small-angle X-ray scattering measurement, and the neutron scattering measurement is small-angle neutron scattering measurement.

3. The method according to claim 1,

wherein the polymeric material is a rubber material formed from at least one conjugated diene compound.

4. The method according to claim 3,

wherein the rubber material is a rubber material for tires.

5. The method according to claim 1,

wherein measurement is performed using the X-rays or neutrons under a condition where q defined by equation 1-1 is in a range of not more than 10 nm⁻

1;

6. The method according to claim 1,

wherein the energy loss is evaluated based on a correlation length ξ

in a range of 1 nm to 100 μ

m determined by curve fitting equations 1-2 and 1-3 to a scattering intensity curve I_(q) obtained by the X-ray scattering measurement or neutron scattering measurement;

7. A method for evaluating chipping resistance of a polymeric material, comprising:

irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

8. The method according to claim 7,

wherein the X-ray scattering measurement is small-angle X-ray scattering measurement, and the neutron scattering measurement is small-angle neutron scattering measurement.

9. The method according to claim 7,

wherein the polymeric material is a rubber material formed from at least one conjugated diene compound.

10. The method according to claim 9,

wherein the rubber material is a rubber material for tires.

11. The method according to claim 7,

wherein measurement is performed using the X-rays or neutrons under a condition where q defined by equation 2-1 is in a range of not more than 10 nm⁻

1;

12. The method according to claim 7,

wherein the chipping resistance is evaluated based on a correlation length Ξ

_c in a range of 1 nm to 100 μ

m determined by curve fitting equations 2-2 and 2-3 to a scattering intensity curve I_(q) obtained by the X-ray scattering measurement or neutron scattering measurement;

13. A method for evaluating abrasion resistance of a polymeric material, comprising:

irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

14. The method according to claim 13,

wherein the X-ray scattering measurement is small-angle X-ray scattering measurement, and the neutron scattering measurement is small-angle neutron scattering measurement.

15. The method according to claim 13,

wherein the polymeric material is a rubber material formed from at least one conjugated diene compound.

16. The method according to claim 15,

wherein the rubber material is a rubber material for tires.

17. The method according to claim 13,

wherein measurement is performed using the X-rays or neutrons under a condition where q defined by equation 3-1 is in a range of not more than 10 nm⁻

1;

18. The method according to claim 13,

wherein the abrasion resistance is evaluated based on a number N_c per unit volume of scatterers having a correlation length Ξ

_c in a range of 1 nm to 100 μ

m determined by curve fitting equations 3-2 to 3-6 to a scattering intensity curve I_(q) obtained by the X-ray scattering measurement or neutron scattering measurement;