增韧剂应测试哪些性能? 如何检测?
增韧剂是指能增加材料韧性的添加剂, which is mainly used to improve the impact resistance, 塑料的韧性和抗裂性, 橡皮, 涂料及其他材料, 从而提高材料的机械性能和使用寿命. 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. 常见的增韧剂有聚氨酯, acrylic copolymer, 乙烯-丙烯共聚物, 硅酸钙, 硅酸铝钠, 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 | 抗拉强度, 伸长, 冲击强度, 热稳定性, 耐候性, 耐腐蚀性能 |
| Acrylate copolymer | 热变形温度, 玻璃化转变温度, 抗拉强度, 断裂伸长率, 抗冲击性, 耐候性, 耐化学腐蚀 |
| Ethylene-propylene copolymer | 冲击强度, flexural modulus, 热稳定性, 抗拉强度, 断裂伸长率, 耐候性, chemical resistance |
| Calcium silicate | Particle size, 颗粒分布, 比表面积, 硬度, 粘度, 流变特性, dispersibility |
| Sodium aluminum silicate | Particle size, 颗粒分布, 比表面积, 硬度, 粘度, 流变特性, 分散, 热稳定性, 耐候性 |
增韧剂应测试哪些性能? 如何检测?
测试的性能及指标主要包括物理性能, 机械性能, 热性能, 耐候性, corrosion resistance and other aspects. Specific test methods and test standards may vary depending on the type of toughener, 应用场景及需求. Commonly used test methods include tensile test, impact test, 热分析, 颗粒分析, rheological test, ETC. 在实际应用中, 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.
测试方法
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:
拉伸试验: it can measure the influence of the toughener on the tensile strength, 材料的伸长率和其他性能. 试验方法包括拉伸试验和剪切试验.
增韧剂应测试哪些性能? 如何检测?
冲击试验: 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.
热分析: It can measure the influence of toughener on the thermal stability, glass transition temperature and other properties of the material. 测试方法包括热重分析, 差热分析, 热膨胀分析, ETC.
颗粒分析: it can measure the particle size, 颗粒分布, specific surface area and other indicators of toughening agent. The test methods include laser granulometer, 电子显微镜等.
Rheological test: It can measure the effect of toughening agent on the rheological properties of materials. The test methods include rotary viscosimeter, 动态机械分析仪, ETC.
When testing the performance of toughener, 需要根据具体要求选择相应的测试方法和测试标准, 并确保测试结果的准确性和可靠性.