Quais propriedades devem ser testadas para o agente de endurecimento? Como detectar?
Agente de endurecimento refere-se a um aditivo que pode aumentar a tenacidade dos materiais, which is mainly used to improve the impact resistance, toughness and crack resistance of plastics, borracha, 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 | Resistência à tracção, alongamento, impact strength, thermal stability, resistência às intempéries, resistência à corrosão |
| Acrylate copolymer | Temperatura de deformação térmica, glass transition temperature, resistência à tracção, alongamento na ruptura, Resistência ao impacto, resistência às intempéries, resistência à corrosão química |
| Ethylene-propylene copolymer | Força de impacto, flexural modulus, thermal stability, resistência à tracção, alongamento na ruptura, resistência às intempéries, chemical resistance |
| Calcium silicate | Tamanho da partícula, particle distribution, área específica da superfície, dureza, viscosidade, rheological properties, dispersibility |
| Sodium aluminum silicate | Tamanho da partícula, particle distribution, área específica da superfície, dureza, viscosidade, rheological properties, dispersão, thermal stability, resistência às intempéries |
Quais propriedades devem ser testadas para o agente de endurecimento? Como detectar?
The properties and indicators to be tested mainly include physical properties, mechanical properties, thermal properties, resistência às intempéries, 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.
Método de teste
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:
Teste de tração: 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.
Quais propriedades devem ser testadas para o agente de endurecimento? Como detectar?
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, microscópio eletrônico e assim por diante.
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.