论文部分内容阅读
利用气候试验箱,以氙灯为光源,辅以昼夜循环加热、加湿、喷水方式模拟大气自然环境,探讨人工模拟气候加速老化后聚碳酸酯(PC)结构和性能的变化。探讨人工模拟气候加速老化后,PC拉伸断裂面形貌的扫描电镜(SEM)分析显示,在光、热、氧和水循环共同作用下,聚碳酸酯刚性提高、韧性损失;力学性能测试分析表明:人工模拟气候加速老化后PC的拉伸强度、弯曲强度上升而冲击强度下降;傅里叶变换红外光谱(FTIR)分析显示,老化后PC的特征吸收峰,与人工热水加速老化、人工湿热加速老化的PC相类似,而与人工光氧加速老化的PC有差别;光、氧、热、水等各种环境因素的综合作用使PC性能劣化加快。
Using climate chamber, xenon lamp as light source, supplemented by day and night cycle heating, humidification, water spray mode to simulate the natural environment of the atmosphere, to explore artificial climate simulation accelerated polycarbonate (PC) structure and performance changes. Scanning electron microscopy (SEM) analysis of PC tensile fracture surface after accelerated weathering by simulated artificial climate shows that under the combined action of light, heat, oxygen and water cycles, the rigidity of polycarbonate increases and the loss of toughness is lost. The test of mechanical properties shows that : The tensile strength, the flexural strength and the impact strength of PC after artificial weather accelerated aging were decreased. The FTIR analysis showed that the characteristic absorption peak of PC after aging was accelerated with artificial hot water, Accelerated PC aging is similar to that of PC with accelerated aging of artificial photo-oxygen. The combined effect of various environmental factors such as light, oxygen, heat and water can accelerate the deterioration of PC performance.