What properties do tougheners need to test? How to detect?
Toughening agent refers to an additive that can increase the toughness of materials, mainly used to improve the impact resistance, toughness and crack resistance of plastics, rubber, coatings and other materials to improve the mechanical properties and service life of materials. The toughening agent is usually a polymer compound or inorganic substance, with a high molecular weight and molecular weight distribution, which can form a uniformly dispersed phase in the material, so as to effectively absorb and disperse stress, and improve the toughness and impact resistance of the material. Common toughening agents include polyurethane, acrylate copolymer, ethylene-propylene copolymer, calcium silicate, sodium aluminum silicate, etc.
Performance index
The following are common tougheners and the properties and indicators that may need to be tested:
The following are common tougheners and the properties and indicators that may need to be tested:
What properties do tougheners need to test? How to detect?
| Toughening agent | Performance and metrics that may need to be tested |
|---|---|
| polyurethane | Tensile strength, elongation, impact strength, thermal stability, weather resistance, corrosion resistance |
| Acrylate copolymer | Thermal deformation temperature, glass transition temperature, tensile strength, elongation at break, impact resistance, weather resistance, chemical resistance |
| Ethylene-propylene copolymer | Impact strength, bending modulus, thermal stability, tensile strength, elongation at break, weather resistance, chemical resistance |
| Calcium silicate | Particle size, particle distribution, specific surface area, hardness, viscosity, rheological property, dispersion |
| Sodium aluminum silicate | Particle size, particle distribution, specific surface area, hardness, viscosity, rheological property, dispersion, thermal stability, weather resistance |
The properties and indicators to be tested mainly include physical properties, mechanical properties, thermal properties, weather resistance, corrosion resistance and so on. The specific test methods and test standards may vary depending on the type of toughening agent, application scenarios and requirements. Commonly used test methods include tensile testing, impact testing, thermal analysis, particle analysis, rheological property testing, etc. In practical applications, it is necessary to make reasonable selection and use according to specific requirements, and to test and control in the production process to ensure product quality.
What properties do tougheners need to test? How to detect?
Test method
How to test the performance and indicators of the toughening agent, it is necessary to select the corresponding test methods and test standards according to different performance and indicators. Here are some common testing methods:
Tensile test: can measure the influence of the toughening agent on the tensile strength, elongation and other properties of the material. The test methods include tensile test and shear test.
Impact testing: The impact of the toughening agent on the impact resistance of the material can be measured. The test methods include impact test and drop hammer test.
Thermal analysis: The influence of the toughening agent on the thermal stability, glass transition temperature and other properties of the material can be measured. The test methods include thermogravimetric analysis, differential thermal analysis, thermal expansion analysis, etc.
Particle analysis: can measure the toughening agent particle size, particle distribution, specific surface area and other indicators. The test methods include laser particle size analyzer, electron microscope, etc.
What properties do tougheners need to test? How to detect?
Rheological performance test: The effect of the toughening agent on the rheological performance of the material can be measured. The test methods include rotary viscometer, dynamic mechanical analyzer, etc.
When testing the performance of toughening agent, it is necessary to select the corresponding test method and test standard according to the specific requirements, and ensure the accuracy and reliability of the test results.