What properties should be tested for toughening agent? How to detect?
Toughening agent refers to an additive that can increase the toughness of materials, which is mainly used to improve the impact resistance, toughness and crack resistance of plastics, rubber, coatings and other materials, so as to improve the mechanical properties and service life of materials. Toughening agents are usually polymer compounds or inorganic substances with high molecular weight and molecular weight distribution, which can form a uniformly dispersed phase in the material, thus effectively absorbing and dispersing stress, and improving the toughness and impact resistance of the material. Common toughening agents include polyurethane, acrylic copolymer, ethylene-propylene copolymer, calcium silicate, sodium aluminum silicate, etc.
Index of performance
The following are common toughening agents and their properties and indicators that may need to be tested:
| Toughening agent | Performance and metrics that may need to be tested |
|---|---|
| Polyurethane 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 corrosion resistance |
| Ethylene-propylene copolymer | Impact strength, flexural modulus, thermal stability, tensile strength, elongation at break, weather resistance, chemical resistance |
| Calcium silicate | Particle size, particle distribution, specific surface area, hardness, viscosity, rheological properties, dispersibility |
| Sodium aluminum silicate | Particle size, particle distribution, specific surface area, hardness, viscosity, rheological properties, dispersion, thermal stability, weather resistance |
What properties should be tested for toughening agent? How to detect?
The properties and indicators to be tested mainly include physical properties, mechanical properties, thermal properties, weather resistance, corrosion resistance and other aspects. Specific test methods and test standards may vary depending on the type of toughener, application scenarios and requirements. Commonly used test methods include tensile test, impact test, thermal analysis, particle analysis, rheological test, etc. In practical application, it is necessary to make reasonable selection and use according to specific requirements, and test and control in the production process to ensure product quality.
Method of test
Specifically how to detect the performance and index of toughening agent, it is necessary to select the corresponding test method and test standard according to different performance and index. Here are a few common testing methods:
Tensile test: it can measure the influence of the toughener on the tensile strength, elongation and other properties of the material. The test methods include tensile test and shear test.
What properties should be tested for toughening agent? How to detect?
Impact test: It can measure the effect of the toughener on the impact resistance of the material. The test methods include impact test and drop hammer test.
Thermal analysis: It can measure the influence of toughener on the thermal stability, glass transition temperature and other properties of the material. The test methods include thermogravimetric analysis, differential thermal analysis, thermal expansion analysis, etc.
Particle analysis: it can measure the particle size, particle distribution, specific surface area and other indicators of toughening agent. The test methods include laser granulometer, electron microscope and so on.
Rheological test: It can measure the effect of toughening agent on the rheological properties of materials. The test methods include rotary viscosimeter, dynamic mechanical analyzer, etc.
When testing the performance of toughener, 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.