This standard specifies the equipment, test temperature, test steps and test results for determining the non-volatile content of adhesives. This standard is applicable to adhesives that have significant mass loss when heated and volatilized. GB/T 2793-1995 Determination of non-volatile content of adhesives GB/T2793-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Determination of nonvolatile content of adhesives
Test method for nonvolatile content of adhesives1 Subject content and scope of application
GB/T 2793-—1995
Replaces GB2793-81
This standard specifies the equipment, test temperature, test steps and test results for determining the nonvolatile content of adhesives. This standard applies to adhesives that have obvious mass loss when heated and volatilized. 2 Principle
The nonvolatile content of adhesives is determined by heating the sample at a certain temperature for a certain period of time, and expressing it as the percentage of the mass of the sample after heating to the mass of the sample before heating. bzxz.net
3 Instruments and equipment
3.1 Blast constant temperature oven: temperature fluctuation is not more than soil 2℃. 3.2 Thermometer: 0~150℃, graduation value is 1℃. 3.3 Weighing container: weighing bottle or aluminum foil with a diameter of 50 mm and a side height of 30 mm. 3.4 Analytical balance: sensitivity is 1 mg.
3.5 Dryer: dryer with color-changing silica gel. 4 Test temperature, test time and sampling amount
4.1 Amino resin adhesive: test temperature 105±2℃, test time 180±5min, sample amount 1.5g. 4.2 Phenolic resin adhesive: test temperature 135±2℃, test time 60±2min, sample amount 1.5g. 4.3 Other adhesives: test temperature 105±2℃, test time 180±5min, sample amount 1.0g. 5 Test steps
Weigh the adhesive sample as required, accurate to 0.001g, place it in a container that has been weighed and weighed at the test temperature, and heat it in a blast constant temperature oven adjusted according to the test temperature. The heating time is as specified in Chapter 4. Take out the sample, put it in a desiccator to cool it to room temperature, and weigh its mass basis.
6 Result expression
The non-volatile content is calculated as follows:
X= ㎡ × 100
Where: X—non-volatile content,%;
-mass of the sample after heating, g;
m——-mass of the sample before heating, g.
The test result is the average of two parallel tests, and the test result is retained to three significant figures. Approved by the State Bureau of Technical Supervision on December 20, 1995 572
Implemented on August 1, 1996
Test Report
GB/T2793—1995
Specimen source, specimen name, manufacturing date, test date; test temperature, test time;
Non-volatile matter content, %.
Additional Notes:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Shanghai Rubber Products Research Institute. This standard was drafted by Shanghai Rubber Products Research Institute. The main drafter of this standard is Wang Meifen.
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