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GB/T 11205-2009: Determination of thermal conductivity of rubber wire method
Status: Valid GB/T 11205: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 11205-2009 | English | 189 |
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Determination of thermal conductivity of rubber wire method
| Valid |
GB/T 11205-2009
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| GB/T 11205-1989 | English | 199 |
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Rubber--Determination of thermal conductivity by means of transient hot-wire method
| Obsolete |
GB/T 11205-1989
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PDF similar to GB/T 11205-2009
Basic data | Standard ID | GB/T 11205-2009 (GB/T11205-2009) | | Description (Translated English) | Determination of thermal conductivity of rubber wire method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G40 | | Classification of International Standard | 83.060 | | Word Count Estimation | 8,866 | | Date of Issue | 2009-04-24 | | Date of Implementation | 2009-12-01 | | Older Standard (superseded by this standard) | GB/T 11205-1989 | | Regulation (derived from) | PRC National Standard Approval Announcement 2009 No.6 (Total No.146) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the method for measuring the thermal conductivity of rubber material with hot method. This standard applies to the determination of uncured rubber vulcanized rubber and thermal conductivity. This standard does not apply to water swelling rubber rubber and metal powders. | GB/T 11205-2009: Determination of thermal conductivity of rubber wire method---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of thermal conductivity of rubber wire method
ICS 83.060
G40
National Standards of People's Republic of China
Replacing GB/T 11205-1989
Determination of the thermal conductivity of rubber wire method
Posted 2009-04-24
2009-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 11205-1989 "rubber thermal conductivity measurement of transient hot wire method."
The main technical differences between standard compared with GB/T 11205-1989 as follows.
--- Modify the standard name;
--- Increased warnings;
--- Deleted provisions thermal conductivity test range (see Chapter 1);
--- The definition of thermal conductivity supplemented (see Chapter 3);
--- Added a sample size of 50mm × 6.3mm (1989 Edition 6.3; 6.4 edition);
--- Adjust the sample has been modified (see 7.2);
--- Remove the formula test error (1989 edition 8.6);
--- Added "test results to three significant figures" (edition 9.2).
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standards Commission Oak Common test methods for Standardization Technical Committee (SAC/TC35/SC2) centralized.
This standard was drafted. Northwest Rubber Plastic Research and Design Institute.
The main drafters of this standard. Gao Yun, Zhu Wei.
This standard replaces the standards previously issued as follows.
--- GB/T 11205-1989.
Determination of the thermal conductivity of rubber wire method
Warning. Use of this standard laboratory staff should have regular experience. This standard does not point out all possible security issue, use
Those who have the responsibility to take appropriate safety and health practices and to ensure compliance with the relevant provisions of state laws and regulations.
1 Scope
This standard specifies the method for determining the thermal conductivity of the rubber material with a hot wire method.
This standard applies to the determination of vulcanized rubber and unvulcanized rubber thermal conductivity.
This standard does not apply to water-swellable rubber, rubber and metal powder.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 2941 rubber physical test method for preparing and conditioning General Procedure (GB/T 2941-2006, ISO 23529.2004, IDT)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Under heat transfer conditions represent two plane temperature difference per unit length apart as one unit (K) when, in unit time through unit area
Product heat transfer. Units of W/(m · K).
4 Test principle
The use of thermal resistance material made of a plane probe, making it as a heat source and a temperature sensor. Thermal coefficient resistance temperature of the material ---
And a linear relationship between the degree of resistance that by understanding the change in resistance can know the heat loss, reflecting the thermal properties of the samples. In the test
Process, the probe is placed in the middle of two samples tested, the current through the resistance of the material to produce a certain amount of heat, the temperature rises,
The heat generated at the same time to the two sample diffusion, diffusion rate depends on the heat transfer characteristics of the material. By responding to and recording temperature probe
Time, the properties of the material can be calculated.
A constant current I, will be produced per unit length q = I
2R
(R being the wire resistance, L is the length of the wire) of Joule heat. Heat will lead week
It conforms to the following mathematical relationship between.
4πλ
- [] C (1)
Where.
λ --- thermal conductivity of the medium, in units of watts per meter Kelvin [W/(m · K)];
Thermal diffusivity Rao --- medium, in units of meters per second (m2/s);
C --- Euler's constant, to 0.5772;
T0 --- initial temperature when the unit is Kelvin (K);
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