This standard specifies the test method for determining the resin content of glass fiber reinforced plastics by burning method. This standard is applicable to glass fiber reinforced plastics whose resin matrix can be burned out. GB/T 2577-1989 Test method for resin content of glass fiber reinforced plastics GB/T2577-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T2577-1989
Test Method for Resin Content of Glass Fiber Reinforced Plastics Implementation
1996—08—01
State Administration of Building Materials Industry
Page 1
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"Test Method for Resin Content of Glass Fiber Reinforced Plastics" Data No.:
2577-1989
1 Subject Content and Scope of Application||tt| |2 Reference standards
4 Instruments and equipment
5 Test steps
6 Calculation
7 Test results
8 Test report
Additional notes:
Page 2
"Test method for resin content of glass fiber reinforced plastics" Material No.:
2577-1989
1 Subject content and scope of application
This standard specifies the test method for determining the resin content of glass fiber reinforced plastics by burning method. This standard is applicable to glass fiber reinforced plastics whose resin matrix can be burned out. inoaec.com
Material resin composite
Wei Zeng Ma
Strong plastic rice
2577-1989
Page 3
Reference standard
GB1446 General principles for test methods for properties of fiber reinforced plasticssinoaec.com
Glass fiber
Material resin composite
Content
Wei Zeng Ma
Strong plastic rice
2577-1989
Page 4
3 Test sample
3.1 The mass of the test sample is 2~5g, and its maximum size is 25mm×25mm×5mm. 3.2 The number of test samples, at least 3 per group.
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3.3 In addition to the provisions of Chapter 1 of GB1446, the sample preparation shall also comply with the following provisions a. If the thickness of the test material is greater than 5mm, keep the original size in the thickness direction when sampling, and the size of any other direction shall not exceed 5mm;
b. For honeycomb sandwich structures, separate the face plate and the core first, and then prepare the samples separately according to the provisions of Article 3.1; c. For multi-layer structures, when the overall resin content is required, prepare the sample according to Articles 3.1 and 3.3 a: When the resin content of each structural layer needs to be determined, use the layered peeling method to take samples. When peeling is difficult, the sample can be filed into a powdery form to avoid mixing between layers.
Test Method for Resin Content of Fiber-Reinforced Plastics》Glass
2577-1989
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4 Instruments and Equipment
4.1 Analytical Balance: Sensitivity 0.1mg.
4.2 Maofu furnace: the temperature control accuracy is ±20℃ between 450～650℃. sinoaec.com
4.3 Porcelain crucible: not less than 30mL.
4.4 Dryer.
Resin composite material
Wei Zengma
Strong plastic rice
2577-1989bzxZ.net
Page 6
5 Test steps
5.1 The appearance inspection of the sample shall be in accordance with the provisions of Chapter 2 of GB1446. 5.2 The sample shall be wiped clean with a soft cloth dipped in a solvent (which will not corrode the sample) and pre-treated in one of the following ways or according to the product requirements.
a. Place in the desiccator for at least 24 hours;
b. Dry at 80℃ for 2 hours and then place in the desiccator to cool to room temperature ec.coi
5.3 Heat the glass in a Mofu furnace at 625±20℃ for 10-20 minutes, then place in a desiccator, cool to room temperature, weigh, and be accurate to 0.1mg. Repeat this operation until the difference between two consecutive weighing results does not exceed 1mg. 5.4 Place the pretreated sample in a crucible and weigh it to an accuracy of 0.1mg. 5.5 Place the crucible containing the sample in a Mofu furnace and heat it to 350-400℃: keep the temperature constant for 30 minutes, then heat it to 625±20℃ or the selected temperature, and keep the temperature constant until all the carbon disappears. Glass
Test method for resin content in glass materials》
5.6 Take the crucible with the residue out of the Maufu furnace, put it into a desiccator, cool it to room temperature, and weigh it to an accuracy of 0.1 mg.
5.7 Repeat the burning, constant temperature, cooling, and weighing until the difference between two consecutive weighing results does not exceed 1 mg. Lou
2577-1989
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5 Calculation
The resin content is calculated according to the following formula:
Wr=m2-m3/m2-mlX100
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Where: Wr resin content, %;
ml-the mass of the crucible, g;
m2-the total mass of the crucible and the sample, g;
m3-the total mass of the crucible and the residue after burning, g. Note: The resin content calculated by the above formula includes the impregnating agent of the reinforcing material and a small amount of low molecular weight substances that can be burned. If necessary, a blank test can be used for correction.
Wei Zeng Ma
2577-1989
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7 Test results
According to the provisions of Chapter 6 of GB1446
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Test for content of strong plastic resin
Glass fiber
Wei Zeng Gong
2577-1989
Page 9
3 Test report
According to the provisions of Chapter 7 of GB1446
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Test for content of strong plastic resin
Glass fiber
Fiber reinforced
2577-1989
Page 10
Additional notes:
This standard is proposed and managed by the National Technical Committee for Standardization of Fiber Reinforced Plastics. This standard was drafted by the Harbin Glass Fiber Reinforced Plastics Research Institute of the State Building Materials Industry Bureau inoaec.com
The main drafters of this standard are Wang Hui and Wang Rongqiu.
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