This part of GB/T2546 specifies the methods for specimen preparation and performance determination. This part specifies the methods and conditions for specimen preparation and performance determination. GB/T 2546.2-2003 Plastics Polystyrene (PP) Molding and Extrusion Materials Part 2: Specimen Preparation and Performance Determination GB/T2546.2-2003 Standard Download Decompression Password: www.bzxz.net

GB/T 25464-1 Explosive materials of propylene (P) and propylene (P): Economic materials are divided into the following two parts: Part 1: Naming system and classification Part 2: Test specimen preparation and performance determination This part is Part 2 of GB/T 25464-1.
GB/T 2545.2—2D03
This part amends GB/T 1301873-2:1997 (1) Part 2: Preparation of test specimens and determination of properties of extruded materials (English version) ... 01573·2:1997 China Commercial Standard for Non-use has been revised. This part refers to the revised standard. For the periodic changes of the standard, see Appendix A.
Appendix to this part Bibliographical information of this part
This part is approved by China Petrochemical Corporation. This part is approved by China Plastics Standardization Technical Committee of China Plastics Products Branch (C5BTS/TC.15/SC:1) 1 Drafting unit of this part: Beijing Petrochemical Corporation Resin Base Research Institute. This part! Drafting persons: Xuan Hongyuan, Gong Shuhua, T Xiaopai Xinmei. 1 Scope
Plastics Propylene (P) Molding and Extrusion Materials
Part 2: Preparation of test specimens and determination of properties
CB/T This part of 2546 2—2C03/T26 specifies methods for the preparation of test specimens and the determination of properties of extruded and molded materials. It also specifies requirements for the preparation of test specimens and the condition of the test specimens prior to testing. This part specifies the conditions for the preparation of test specimens and the properties of the extruded and molded materials. This part describes the properties and test methods that are suitable and necessary for characterizing the properties of extruded and molded materials. These properties are selected from the test methods in SC031. This part also specifies other test methods for extruded materials that are widely used or have special significance, as well as the test methods for the named properties in part 1. In order to obtain test results that are marketable, the test preparation conditions, specimen sizes, and test loads specified in this part should be used. Test data obtained from specimens prepared with inappropriate test components or specimens of inappropriate size may be invalid. 2 Normative references || TT || The following clauses in 1 shall apply to this part and shall be construed as the clauses of this part. For the period of use indicated in this part, all subsequent amendments (excluding omissions) or revisions shall not apply to this part. However, parties to an agreement that has not yet been reached with this part may use the current versions of these documents. For any referenced documents not indicated in this part, the latest version shall apply. B/T14U--1S89 Relative dielectric constant and dielectric loss factor of solid absolute materials under conditions of sound, sound and combustion (including wavelength) (c0250:56)
B/14101989 Test method for volume and surface resistivity of materials 5003:15) GB/T 1634.1
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Plastics - Determination of deformation temperature under shear force, Part 2: General test methods for plastics and hardness test" G218-1698
Details of the two sections and test criteria for the whole material test <:9,:19975BT 3682
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Oxygen index method Determination of combustion properties Part 2, Room temperature test materials Determination of the tensile properties of plastics Part 2: Instrumental impact test Determination of tensile impact properties
Obtaining and expressing comparable single point numbers Part 1: Moulding materials\Differential scanning calorimetry (S) Part 1, General principles Differential scanning calorimetry
You can use the overflow mold, but it is necessary to keep the whole piece during the cooling time, which can avoid material loss from the mold or the appearance of pits. (4) The appropriate preheating time depends on the type of mold and the heating method (steam, electric). For the pressure-type mold, 5 minutes of preheating is sufficient, while for the non-quality mold, when the pressure-type mold is used, it may take nearly 1 minute to preheat.
4 Test state adjustment
The test state of the heavily filled PP material sample should be adjusted according to the requirements of /12918. The temperature of the test piece shall be 23°C to 7°C for at least 40°C and the time shall not exceed 60%. The relative humidity shall be 60% of the rated T material. The performance specifications and numbers of the two molding and folding materials shall be expressed in accordance with the standards listed in TSO108%C-1 with additional instructions and notes. Except for the special periods in test 3 and 4, all tests shall be carried out under the standard test environment specified in (T/T 2918), with a relative humidity of 50% at 23°C and a relative humidity of 5%. Table 8 is quoted from 1S0035J-1. The properties listed in Table 1 are for polymer molds and extrusion materials. These properties are for comparison of different thermoplastics and several batches. The properties listed in Table 1 are related to the performance of the layered materials and have a significant effect on the performance of polymer molds and extrusion materials. Table 3 Transformation properties Melt flow rate Pressure drop 1.2 Grid area dynamics 1. Plastic shrinkage GP/3582 General properties and test conditions Other types and sizes GJVT 17037.4
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GB/T 25-6.2—2003
(Material properties appendix)
Comparison table A. of the normative referenced documents of this part and [501B73-2:1997 referenced standards: Lists the thermal specifications of this part and 1S01873? ：3 References to subject matter Table 4.1 Comparison of normative references in this part with the referenced standards in 1S0 1873-2:1997*9
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IEC SCS5 10,199
ASTM T20 9.a
This standard will be published as soon as it is completed. The new standard adopts the second edition of IS751. This standard will be issued soon. The standard is equivalent to the 0752 edition GB/T 2546.2-2003-1987. 2:1989
1SO :6363:1993
1S0 3146:1485
IEC 213 ---S86
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5309 issued TS03146: 2000 elastic material rate group pipe and letter product heat release land chemical index product cumulative compound calculation with the column (for the strong determination of the degree or range of use? SC is not included The S0 market has issued the DSC standard SQ11357-1 and the national standard 11357-1, which is equivalent to the standard for children.
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