This standard specifies two methods for determining the thermal stability of blends and products based on polyethylene homopolymers and copolymers (hereinafter referred to as PVC) by placing them in the form of thin sheets at high temperatures and causing discoloration. This standard is applicable to the determination of the thermal degradation resistance of PVC, and is evaluated by the color change at different heating times under standard conditions. The results are only relative and are not applicable to the determination of colored PVC materials. - Method A: Oil bath method - Method B: Oven method The stability time obtained by the two methods may be inconsistent, and the two results cannot be directly compared. GB/T 9349-2002 Determination of thermal stability of polyvinyl chloride, related chlorine-containing homopolymers and copolymers and their blends - Color change method GB/T9349-2002 Standard download decompression password: www.bzxz.net

1L83.080.20
National Standard of the People's Republic of China
GB/I.93492002
eqIS0 305:1990(F)
Determination of thermal stability of poly (vinylchloride) related chlorine-containing homopolymers and copolymers and thcir compounds Discoloration method metliod2002-05-29 release
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
200212-01 implementation
GH/T9349-2002
A standard is equivalent to the international standard 15L)305:1!00E Determination of thermal stability of polyoxyethylene, related oxygen-containing homopolymers and their copolymers and their mixtures by color change method. National standard G/T934!19% chlorine medium, copolymer resin and its composition thermal test range is called color change calculation
The main differences between this standard and 15305:1990 (E): According to the test requirements, aluminum micro-pins and pins should be preheated to the specified temperature before testing, while 15305, 1993 (C) has some changes.
This standard changes the aluminum ingots and aluminum columns taken out after heating into water cooling according to the actual situation, and 19 () 302:15 is not required.
This standard is based on S) G5:179, and the test samples are made of the case distance. Therefore, the control temperature of the oven required by this standard is given in two forms: 1S305, 1994 (E) is U.5. The main differences between this standard and CB/T934≤-1985 are: the oven method is used in the standard, while the original standard does not have this method, and the pipe diameter and the whole diameter of this standard are different from the original standard requirements. This standard recommends that different chemical products be tested at different temperatures. The original standard specifies the technical specifications. This standard summarizes the corresponding relationships with IS3/151 and IS51. The standard names are summarized as follows: Appendix A and Appendix H of this standard are the corresponding tables: This standard shall replace GI3/9349-998 from the date of implementation. This standard is approved by the State Petrochemical Industry Bureau. The standard is drafted by the National Plastics Standardization Technical Committee (T:5/SCT), and the drafting units are: Jinxi Chemical Research Institute, Xinfu Zhongli Chemical Duannuo Co., Ltd. The main drafters of this standard are Chen Nongyun, Xing Fengmei and Liang Bin. This standard was first published in 1988.
GB:T 9349-2002
ISO
The International Cup Standardization Organization (ISO) is a worldwide alliance composed of standardization bodies (IS member bodies) of various countries. The work on international standards is usually carried out by the ISO technical committee. For any member body that has not established a technical committee, any school or organization that has a good reputation in the field of technical standards can send representatives to participate in the work of the technical committee. In the field of technical standards, ISO () maintains a cooperative relationship with the International Electrotechnical Commission (IFC): the draft international standard is submitted to the member bodies for voting by the technical committee. As a standard, it needs the consent of 7% of the member bodies participating in the vote. The international standard ISO305 was formulated by 150/TCI type technical. This second edition replaces Part I (2S) 395: 1976) and constitutes a technical specification as follows: Edition 1 Scope || TT || National Standard of the People's Republic of China || TT || Poly(vinylchlorid) rulxted chlorine-containing homopolymers and copolymers and their corupounds Determination of thermal stability Discoloration mcthratB/T9349—2002
rqr1so305:1990(E5
代/16—15
This standard specifies the thermal stability of PVC products and articles based on olefin homologues (hereinafter referred to as PVC) by placing thin sheets in high pressure to determine the color change process. This standard is applicable to the thermal degradation ability of PVC. The color change is evaluated under standard conditions at different heating times. The results are only relative and are applicable to colored PVC materials. Method A: secretion method
--Method T: oven method
Output The time given by the flash parts may not be the same, so the two results cannot be compared directly. 2 Principle
2.7A method: wave bath method
Place a group of test samples between staggered aluminum samples to limit the heat transfer and heat them at high temperature in a flat environment
2.2E method: place the group of test samples on a flat small clean box, and heat them in a ventilated oven at different high temperatures
3 Preparation and quantity of test samples
3.1 Test samples include:
4 Natural: 14mm diameter and 1mm thickness 1. Method: square with side length 1.3mm and width about 1.3mm. Punch the test piece from the required sheet. 3.2 The number of test specimens to be tested is calculated by dividing the expected time by 5. If the material is to be tested, it is recommended to take out one sample 15m before the initial heat change occurs. The number of samples to be tested can be reduced.
3.3 If the material to be tested is plastic or plastic, the material should be tested on the machine according to the conditions specified by the material or the conditions between the two. See Appendix A (shown in Appendix: Preparation of test pieces). 3.4 If the material to be tested is a plate (plastic), the sound will be made into a suitable amine tablet. Preparation of test pieces Appendix B (Appendix to the attached document)
The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China 2092-05-29 Approved 2002-12-0° Inquiry
1 Test temperature
GB/T93492002
The test temperature should be within the range specified by the material specification or the agreement between the two parties. In the latter case, the test duration should be selected within 6°C-120min. If there is no temperature range and agreement, a test temperature of 180°C should be used. 5.1.1 The whole process: equipped with a stirrer. It can accommodate a suitable number of test tubes with a depth of 6°C m-70 m, and an accuracy of 0.C. 5.1.2 Glass test kidney. Scale:
Outer diameter: 18=0.4mm
Thickness, 1.22.
Length 130mm
5.1.3 Ingot, as shown in Figure 1bZxz.net
1 Aluminum system
5.1.4 Diameter (15±.mm) 30mr
5.1.5 Temperature. Accuracy 3.1C.
5.1.6 Sand table.
5.2.1 Drum oven, temperature control precision 1T before testing, close to the combustion box you make a fake bone in the test part, in order to replace the temperature of the creation, or at the expected temperature, the bracket on the same sample of the price of a sample on the test three, heated to the seal ten color change. Under the test conditions, 5tri--60mn test column should be able to produce obvious changes in color, sprinkle the sample color, determine the good quality of the foil
5.2.2 Foil
5.2. 3. Degree meter, accuracy .1 (
5.2.4 Stopwatch.
6.1.1 Prepare the test tube (61.2), put the aluminum and the column in the test tube, and then put it into the specified calibrated bath, and then take out the new column. Put a piece of sample 3.1) on the bath and hold the sample with a temperature of 1.2. 6.1.2 Take out a test tube from the bath for 5 minutes, put the sample in cold water to cool, take out the sample, and fix the sample on the sheet marked with the sample heating time and the measured temperature according to the following numbers: 6-2B
6.2.1 Put the material to be measured in detail 3.13 on a piece of Kai box master and the sample on the bracket. GB/T9349—2002
6.2.2 Place the rack in the oven that has reached the test temperature, and keep the oven door open for the shortest possible time. When the oven door is opened, close the air chamber. 6.2.3 Take out the aluminum and test samples quickly at the selected time intervals, and number the samples in order. 6.2.4 Fix the sample on the lower sheet marked with the heating temperature and the test temperature. 7 The result is displayed from the start of the test to the moment when the color change and light are completely dark: in minutes. 8 The precision width is not given because there is no data from the experimental case. 9 The test report includes the following contents: a) The use of this national standard 1) Complete identification of the sample, including the preparation method of the sample (such as the potential treatment). c. Measure the dynamic temperature,
d) Set the sample on the card and the test sample (must be kept in a dark place), start the test until the color change ring is completely black, measured in m. [】Test period,
41 Materials
GB/T 9345—2002
(Note)
Preparation of general-purpose ethylene oxide resin (PVC) test piece 41.! Fat acid pain'Cd51): 1 Industrial products
41.2 Tris(IK) dicarboxylic acid (IK) P! :.1. Certification products: 41.3 Titanium dioxide: Industrial products,
A2 Instrument
42.1 Dual-energy plastic training machine: 150mm×320mm, control end precision 2 center. 42.2 Temperature meter should be calculated; precision should be 1r! .
A2.3 Meter 0.1m.
42.4 Cup: stainless steel or material,
43 Selection of slices for preparation
Formula table.
Time ratio (mass fraction>
13.2 Change to step
0. 45_0. 05
43.2-1 The water cup should be weighed to save DP, PVC for example, hard yogurt and titanium will be weighed again (or not) dry cup. The material core will be elastic and uniform.
A3.2.2 Start the double-rotation plastic purifying machine. When the temperature stabilizes to (160°C), fill the cup with strong material and time it. Put the net material back on the end. After all the roots are wrapped, measure the thickness from the two ends of the sample hall to make the film thickness (1.1: twice per minute. Cut the material to mir and pull it out into a film. Appendix
(projection record)
Preparation of polyvinyl chloride (PVC) resin test pieces
R1.1 Calcium stearate (ClS!): industrial isocyanate,
R1.2 Ortho-methyl ester: TX)P): Process.1.3#: 1 Industry
B2 Apparatus
R2.1 Constant temperature drying oven: fine deer 1.
B2.2 Glass slurry: Degree (1.0±.1mm
3 Preparation of film
Formula table H1.
Mixed with the same quality
GB/T 93492002
Formula table
0.at=. a1
.±.c1
Operation steps
Weigh the required X, PVC resin in a cup, then weigh the ISI and molten iron (optional), mix the materials evenly in a cup. Place on a (1.0=u1)mm wide pressure mold and keep it stationary for 1Gnmin. Put it in a temperature box, and take out the test piece after cooling at (6+2): for 30min.
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