This standard specifies the determination method for the release of hydrogen chloride and any other acidic products from blends and products based on homopolymers and copolymers of vinyl chloride (hereinafter referred to as PVC) at high temperatures. This standard applies to blends and products based on PVC as the main component, and is not applicable to mixtures formed under dry mixing. This method can be used to characterize the thermal stability of PVC blends and products. This method is applicable to colored PVC blends and products that do not meet satisfactory fading tests during heating. GB/T 2917.1-2002 Determination of hydrogen chloride and any other acidic products released from blends and products based on homopolymers and copolymers of vinyl chloride at high temperatures Congo red method GB/T2917.1-2002 Standard download decompression password: www.bzxz.net

[CS 83.080. 20
National Standard of the People's Republic of China
GB/T 2917.12002
eq1so182-1:1990
Determining compounds and products based on vingchloride homopolymers and copolymers to evolvehydrogengcn chloride and any other acidic products at elevated temperatures
Congo red method
Determining compounds and products based on vingchloride homopolymers and copolymers to evolvehydrogengcn chloride and any other acidic products at elevated temperatures Congo red melhod2002-05-29Promulgated
People's Republic of China
National Quality Inspection Bureau
2002-12-01Implementation
CB/I 2917.1—2002bzxz.net
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This standard is equivalent to the international standard 1S0182-1:1990 Plastics—Determination of the tendency of copolymers of ethylene oxide and their release of chlorinated emulsions and other intoxicating products at high temperatures—Part 1, and is formulated based on the recommended national standard 2017—092 Congo red method and pH determination method. The main differences between this standard 190182-1:1990 are: this standard does not mention the warning spectrum, while 15182-1.1990 has a warning; this standard does not mention the influence of hidden chlorinated products on the safety and color of paper, while TS)18-1:100 mentions the impact of design. This standard specifies the length and width of the common test tube, while JS (1821: 1990 does not specify the range of this standard oil bath card, and 19122-1.1990 specifies the three main differences between the retreat pool diagram and GB29171982. This standard adopts the international standard ISQ182-1: 1990, and cancels the P11 value in the original standard. In order to maintain the accuracy of controlling the wet temperature, the oil bath area requirements are raised, the control wet material point is raised, and the standard name is changed. This standard replaces G1H/T29)7-1982 from the date of implementation. This standard is proposed by the National Petroleum and Chemical Industry Bureau. This standard is mainly under the jurisdiction of the National Technical Committee on Standardization of Polyvinyl Fluoride Energy Products (TC:15/SC7): Jinxi Chemical Research Institute and Xinjiang Zhongan Chemical Co., Ltd. The main drafters of this standard are Bu Yun, Du Fengmei, Liang Bin and Zhang Qihen. This standard was first issued in 1982.
LH/3'2917.1—2002
ISO Foreword
The International Organization for Standardization (ISO) is a world-renowned association of member organizations of various international standards bodies (ISO). The work of formulating international standards is usually carried out by ISO technical committees. Member organizations have the right to participate in the work of technical committees established by the technical committees. Government or non-governmental organizations related to ISO are usually involved in this work. In the field of electrotechnical standardization, ISO maintains a close cooperative relationship with the International Electrotechnical Commission (IEC). The draft International Standard returned to the Technical Committee is submitted to the member groups for voting. Publication as an International Standard requires approval by at least 15 % of the members voting on it. International Standard 1S182-1 was prepared by ISO/ISO/ISO 1X:61 Technical Committee Plastics, together with ISO 182-2, which replaces the two parts of ISO Recommended Standard R182:1970, ISO 182-2, forming one revised version. ISO 182 consists of the following parts, using general standards: Plastics - Determination of the potential for release of chlorine gas and other acidic products by products containing predominantly ethylene glycol and ethylene glycol at high temperatures.
Part 1: Congo red method
Part 2: pH method
"·Part 3: Conductivity method
Part 4: Conductivity method
1 Standard
National Standard of the People's Republic of China
Determination of transient nitrogen and any other acid products released from copolymers and products based on ethylene oxide homopolymers and copolymers at elevated temperaturesCongo red method
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GH/T 2917.1, 2002
eqv 1SO 182-1:1990
# GHT .7—82
The third standard specifies the method for determining the release of chemical and other acidic products from copolymers and products mainly composed of ethylene glycol and its products (hereinafter referred to as PVC) at elevated temperatures. The sixth standard is applicable to copolymers and products mainly composed of VC, and is used for mixtures formed under dry conditions. This method can characterize the thermal stability of PV blends and products. This method is generally used to test the color of PVC and its mixtures and products that cannot be over-colored during heating:
2 Referenced standards
The texts contained in the following standards are incorporated into the provisions of this standard by reference in this standard: This standard was published. The versions shown are all in date. All standards are subject to revision, and parties to this standard should consider the possibility of using the latest versions of the following standards: CB/5003.1-10 Test sieve composition of metal wire mesh ([S03310-1:190) GB/632 —1592 Specification and Test Methods for Water in Analytical Laboratories (eg15) 369: 1287) 3 Principle
PV blending: Keep the sample of the finished product at a constant temperature without aeration until the Congo red test paper on it changes from red to green. If only the test paper is used, the color change is FH=3, and the time required for the change is the stabilization time. 4 Material
4.1 Congo red test paper: about 10mm wide and 30mm long. Cut the filter fiber with a width of about 10mm and a length of 3m into 150g/l of solid red alcohol solution, take it out and then condense it. 4.2 Ordinary paper: pll size 1~-10. Fill about 10mm. Length about 30mm. Separate color to show pH changes 5 Instruments
5.1 Test tube outer ring: 17mm seat: about .4m length: 16mml. 5.2 Group dial: inner diameter (3~%)rm. Length about 1)mm (see Figure 1). The People's Republic of China National Quality Supervision, Inspection and Quarantine Standard 200205·29 approved 2002-12-01 implementation
GB/T 2917.12002
Result method
First heat the tube in the oil bath
5.3 Seat: Drill a hole in the center to insert the finest glass (5.2). 5.4 Oil: penetration is not less than 1G1 leakage control precision 0.5℃, with heat dissipation board, the board surface has a hole that can be inserted into the test (5.1) [see Figure 1]:
5. 5 loss gauge, accuracy 0. 1℃;
.5.6 stopwatch.
6 Preparation of test materials
Determination of stabilization time These factors depend on the surface area of ​​the test materials and their heating relationship curves. Any cutting and grinding of materials required for the preparation of the test materials should be carried out in a consistent manner, and excessive heat should be avoided when grinding the materials. 5.! PVC double glue, crush the material on the sparse board, and then put it in the oven at a predetermined temperature to form a 1.51-mm thick film. Cut the film into squares with a side length of about 2 mm: 6.2 PVC granules, calendered materials, injection molding materials, plates: Cut or grind these materials so that more than 30% of the materials pass through a 2.0 mm sieve ((rl3/T500s) and most of the materials pass through a 1.4 mm sieve to prepare the test material with a 1.4 mm sieve residue. 6.3 PV sheets: Cut the material into squares or cubes with a side length of less than 2 mm. 6.4 PVC polyester layer: Separate the coated surface and treat according to 6i.2 or 5.3. 6.5 Insulation or protective layer of cables and guide fleece: Cut into 6.2 The required size of the thin film, the test temperature should be determined according to the product specification or by negotiation between the two parties. The following temperatures are used for the unplasticized blends and products: 2UC
For the common hooks and products of the cable coating layer and protective layer: 200°C. GR/T 2917: 1—2002
For other materials and products: 180°C, 8 Test Steps
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8.1 Place the sample prepared in Section 6 in the test tube (5.1), with a height of about 50mm, and move it slightly. The sample should not be filled too tightly or stuck to the test tube.
8.2 Roll or fold the test tube into a corrugated glass tube (5.2). Insert the glass tube into the test tube and seal the tube with a sealant to keep the test tube in place for 25 minutes. 8.3 Place the prepared test tube into the oil that has reached the test temperature until it is level with the test surface (see Figure 1) and start timing. 8.4 When the red test paper in the test tube changes from red to blue, stop timing. When using Congo red test paper, the last point corresponds to the H-, stop timing.
8.5 When these quantifiers are used for PVC compositions, the color change is very slow and unreliable. In this case, when using Congo red test paper, record the time when the red changes to purple and the time when the purple changes to blue. 9 The maximum value of the results
The arithmetic mean of the results of the parallel experiments is the stable time. When the relative deviation of a single value from the average is greater than 1 centimeter, the result shall be abandoned and re-measured.
10 Precision
The precision is not determined due to the lack of experimental batches. 11 Test report
The test report shall also include the following information:
a) Use this national standard.
b) Nature of PV product samples.
Name of deformation) Manufacturer, final sample location and degree of sample crushing.
Test source degree.
) Stabilization time (mir), confirm half minute (including single value and arithmetic mean).
In the case of slow color change of the test paper, record the time of the network items in 8.5 (network sample includes single value and arithmetic mean) 8) Test period.
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