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GB/T 5470-2008: Plastics -- Determination of the brittleness temperature by impact
Status: Valid GB/T 5470: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5470-2008 | English | 279 |
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Plastics -- Determination of the brittleness temperature by impact
| Valid |
GB/T 5470-2008
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| GB/T 5470-1985 | English | 239 |
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Test method for brittleness temperature of plastics by impact
| Obsolete |
GB/T 5470-1985
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PDF similar to GB/T 5470-2008
Basic data | Standard ID | GB/T 5470-2008 (GB/T5470-2008) | | Description (Translated English) | Plastics -- Determination of the brittleness temperature by impact | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.01 | | Word Count Estimation | 12,167 | | Date of Issue | 2008-08-14 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 5470-1985 | | Quoted Standard | GB/T 2918-1998; GB/T 11547-2008; ASTM D746-2007 | | Adopted Standard | ISO 974-2000, MOD | | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | | 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 under standard ambient temperature at the measurement temperature embrittlement of non-rigid plastic breakage occurs under specific impact conditions. Test specimen according to different types of machine and is divided into two methods. That the use of A-type testing machine and method a type specimen, using B-type and B-type tester sample B method. This standard is derived using statistical methods embrittlement temperature. Due to calculate the brittle temperature on the basis of statistics, so it is necessary to prepare adequate samples. Statistical techniques have been used to define measured as 3. 1 embrittlement temperature. The criteria for determining the brittle temperature of the sample was 50% of the damage. This standard is more useful for the development of material specifications, do not use the lowest measured temperature of the material. When used in material specification, measurement accuracy is not greater than the measured value �� 5��C. | GB/T 5470-2008: Plastics -- Determination of the brittleness temperature by impact---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.
Plastics. Determination of the brittleness temperature by impact
ICS 83.080.01
G31
National Standards of People's Republic of China
Replacing GB/T 5470-1985
Plastics - Determination of temperature impact embrittlement law
(ISO 974.2000, MOD)
Posted 2008-08-14
2009-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts ISO 974.2000 "Plastics --- Impact embrittlement temperature measurement method" (in English).
This standard is based on ISO 974.2000 redrafted.
This standard and ISO 974.2000 main technical differences are as follows.
--- Increased in this standard description of the two test methods (Chapter 1);
--- Increasing the normative references (Chapter 2);
--- ISO 974.2000 international standard referenced by the respective country instead of the standard (Chapter 2);
--- Increasing the B-type test machine (with ASTMD746. the 2007 A-type tester) (5.2);
--- Added "measuring" and "stopwatch" provisions (5.7, 5.8);
--- Increasing the B-type specimens (with ASTMD746. in 2007 Ⅰ type specimen) (6.3);
--- Increase (Cap. 10) chapter "precision";
--- Test report added "indicate the used test method" (Chapter 11).
For ease of use, this standard made the following editorial changes.
--- With a decimal point "." Instead of a comma as the decimal point "."
This standard replaces GB/T 5470-1985 "plastic impact embrittlement temperature measurement."
This standard and GB/T 5470-1985 The main differences are as follows.
--- Increased in this standard description of the two test methods (Chapter 1);
--- Increased (Chapter 2) Chapter "normative references";
--- Increasing the B-type test machine (with ASTMD746. the 2007 A-type tester) (5.2);
Cancel the reading microscope (GB/T 5470-1985 3.6) --- instrument;
--- Increased the requirements for housing and a stirrer (5.5 and 5.6);
--- Increasing the B-type specimens (with ASTMD746. in 2007 Ⅰ type specimen) (6.3);
--- Cancellation notched (see GB/T 5470-1985 4.4);
--- Increased (Cap. 10) chapter "precision";
--- Test report added "indicate the used test method" (Chapter 11).
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee of plastic (SAC/TC15) centralized.
This standard was drafted. China Sinopec Beijing Yanshan Company Resin Application Research Institute.
Participated in the drafting of this standard. National Quality Supervision and Inspection Center of synthetic resin, the National Chemical Building Materials Testing Center (Materials Testing
Section), National Petrochemical organic synthetic resin raw material quality inspection center, Guangzhou Blonde Technology Co., Ltd.
The main drafters of this standard. Zheng Huiqin, Yang Lili, Wang Xiaoli, high Xueyan, Wu Yanjin, Zhaoshu Zhi, Yu Yang, Wang Jiandong, Chao first,
Li Jianjun, Wang Zhenjiang.
This standard replaces the previous standard release case. GB/T 5470-1985.
Introduction
Plastic in a variety of applications required to withstand or not withstand the impact of low-temperature conditions under bending. Orientation generated during processing, thermal history, red
The material is applied to the strike force, particularly urging speed will affect the polymer's brittleness. When applied deformation conditions and test methods Regulation
When predetermined conditions are similar, the embrittlement temperature can be used to predict the behavior of the low temperature plastic material. Brittle temperature test is used to measure the loss of toughness polymer
Was "glassy" temperature.
Plastics - Determination of temperature impact embrittlement law
1 Scope
This standard specifies the method under standard ambient temperature at the measurement temperature embrittlement damage non-rigid plastic impact occurs under specific conditions. press
According to test different types of aircraft and the sample is divided into two methods, namely,
--- Type A and type A tester samples A law;
--- B-type tester and B sample B method.
The standard statistical method derived brittle temperature. Because you want to calculate the brittle temperature on a statistical basis, it is necessary to prepare a sufficient sample
Goods. Statistical techniques have been used to define measured as 3.1 embrittlement temperature.
This standard determines the embrittlement temperature of the sample was 50% damaged. The standard specification for the development of the material is more useful rather than measuring timber
The lowest temperature material. When used in material specifications, the measurement accuracy of the measured value is not greater than ± 5 ℃.
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 2918-1998 standard plastic sample conditioning and environmental tests (idt ISO 291.1997)
GB/T 11547-2008 plastic resistant to liquid chemical reagent performance measurement (ISO 175.1999, MOD)
ASTMD746.2007 assay brittle transition temperature of the impact of plastics and elastomers
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
T50
Under specified test conditions, the temperature of the specimen was damaged 50%.
3.2
Punch testing machine and fixed in the fixture relative velocity between the specimen.
Principle 4
The sample was immersed in a cantilever fixed precise temperature heat transfer medium, according to a predetermined time after the state regulator to regulate in a fixture
Fixed rate single punch swing impact test specimens. Test a sufficient number of samples used to calculate the statistical theory of brittle temperature. 50% of the sample at break
Temperature is the brittle temperature.
5 Instruments
5.1 A type tester
Test samples from the machine jig and punch and mechanically connected components, in order to ensure proper installation of these components can punch at a relatively constant
Under the impact of the sample rate. Figure 1 shows the relationship between the size of A-type test machine punch and clamp assembly, Figure 2 is installed on the sample type A sample holder
With Figure 3 is a detailed description of A-type test machine punch and the sample holder.
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