Method for measuring dynamic viscoelasticity of particulate material

Patent metadata

Field	Value
Publication number	US-9459197-B2
Application number	US-201214124492-A
Country	US
Kind code	B2
Filing date	Jul 18, 2012
Priority date	Jul 25, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A method for measuring a dynamic viscoelasticity of a particulate material uses, as a sample to be subjected to the dynamic viscoelasticity measurement, a sheet-shaped test piece in which the particulate material to be measured is attached to an adhesion layer formed on a heat-resistant sheet base material. With regard to the measurement conditions of the dynamic viscoelasticity measurement, the measurement temperature is within a predetermined temperature range of from −150 to 300° C., the heating rate is a constant rate ranging from 0.01 to 100° C./minute, the measurement frequency is a constant frequency ranging from 0.01 to 100 Hz, and a sine wave control tensile mode is employed. When the particulate material is attached to the adhesion layer, the particulate material crushed in advance is sprinkled on one side of the adhesion layer and then the particulate material-sprinkled surface is squeegeed and/or air-blown.

First claim

The invention claimed is:

1. A method for measuring a dynamic viscoelasticity of a particulate material, the method comprising:
subjecting a sheet-shaped test piece as a sample to dynamic viscoelasticity measurement,
the sheet-shaped test piece comprising a heat-resistant sheet base material, an adhesion layer, and a particulate material to be measured, and
the adhesion layer being formed on the heat-resistant sheet base material, and the particulate material being attached to the adhesion layer;
performing the dynamic viscoelasticity measurement, which is a temperature dependent measurement, under the following measurement conditions:
a measurement temperature is within a predetermined temperature range of from −150 to 300° C.;
a heating rate is a constant rate ranging from 0.01 to 100° C./minute;
a measurement frequency is a constant frequency ranging from 0.01 to 100 Hz; and
using a sine wave control tensile mode; and

forming each of the adhesion layer and the heat-resistant sheet base material each from a material having a maximum peak top of loss tangent tan δ that does not overlap with a maximum peak top of loss tangent tan δ of the particulate material to be measured in the measurement temperature range of the dynamic viscoelasticity measurement.

2. The method for measuring a dynamic viscoelasticity according to claim 1 , further comprising:
attaching the particulate material crushed in advance to the adhesion layer.

3. The method for measuring a dynamic viscoelasticity according to claim 1 , further comprising:
sprinkling the particulate material on one side of the adhesion layer; and
then squeegeeing and/or the air-blowing particulate material-sprinkled surface when the particulate material is attached to the adhesion layer.

4. The method for measuring a dynamic viscoelasticity according to claim 1 , further comprising:
measuring loss tangent tan δ as the dynamic viscoelasticity measurement.

5. The method for measuring a dynamic viscoelasticity according to claim 1 wherein the adhesion layer to be used is formed from a silicone adhesive using peroxide as a curing agent and the heat-resistant sheet base material to be used is formed from a polyimide resin when the measurement temperature range of the dynamic viscoelasticity measurement is from −50 to 250° C.

6. The method for measuring a dynamic viscoelasticity according to claim 1 , wherein resin particles having a coefficient of variance (CV value) of particle size distribution of 5% to 70% are used as the particulate material.

7. The method for measuring a dynamic viscoelasticity according to claim 6 , wherein the particulate material is a particulate material in which an aluminum chelating agent is carried by porous resin particles obtained by interfacially polymerizing a polyfunctional isocyanate.

8. A method for measuring a dynamic viscoelasticity of a particulate material, the method comprising:
subjecting a sheet-shaped test piece as a sample to dynamic viscoelasticity measurement,
the sheet-shaped test piece comprising a heat-resistant sheet base material, an adhesion layer, and a particulate material to be measured, and
the adhesion layer being formed on the heat-resistant sheet base material, and the particulate material being attached to the adhesion layer;
wherein resin particles having a coefficient of variance (CV value) of particle size distribution of 5% to 70% are used as the particulate material, and
wherein the particulate material is a particulate material in which an aluminum chelating agent is carried by porous resin particles obtained by interfacially polymerizing a polyfunctional isocyanate.

Assignees

• Kamiya Kazunobu
• Dexerials Corp

Inventors

• Kamiya Kazunobu

Classifications

• G01N3/32

  by applying repeated or pulsating forces · CPC title

• G01N19/04 Primary

  Measuring adhesive force between materials, e.g. of sealing tape, of coating · CPC title

• G01N2203/0094

  Visco-elasticity · CPC title

• G01N19/00 Primary

  Investigating materials by mechanical methods (G01N3/00 - G01N17/00 take precedence) · CPC title

• G01N2203/0224

  Thermal cycling · CPC title