丙烯酸聚氨酯涂层耐老化性能指标的数学模型

通过丙烯酸聚氨酯涂层室内氙灯加速老化实验，结合光泽度、色差检测和微观形貌分析，探究了丙烯酸聚氨酯涂层耐老化性能指标随加速老化实验时间的变化规律，初步建立了涂层耐老化性能指标随加速实验时间的数学模型.研究结果表明：涂层光泽度、失光率随加速实验时间近似呈类指数函数模型变化；涂层色差随加速实验时间近似呈类幂函数模型变化.通过拟合各性能指标的数学模型得出了涂层耐老化性能指标与加速实验时间之间的数学关系式，相关系数均在0.99以上，具有较好的相关性.
The variations of anti-aging indices of acrylic polyurethane coating with the accelerated aging experimental time were investigated through xenon lamp indoor accelerated aging test, and the mathematical models between the anti-aging indices and accelerated time were also established preliminarily according to the detection of gloss, color difference and micro-morphology. The test results showed that the relationship between the mathematical models of the gloss and the gloss loss rate with the accelerated experimental time were approximately an exponential function, while the relationship between the mathematical model of the color difference with the accelerated experimental time was approximately a power function. Moreover, the experimental data were well fitted based on the mathematical models in order to get the mathematical relationships, and the correlation coefficients were above 0.99.