Eleni P N, Krokida M K, Polyzois G L
Department of Chemical Engineering, National Technical University of Athens, Zografou, Campus, 15780 Athens, Greece.
Biomed Mater. 2009 Jun;4(3):035001. doi: 10.1088/1748-6041/4/3/035001. Epub 2009 Apr 24.
The effect of UVA-UVB irradiation on the mechanical properties of three different industrial types of polydimethylsiloxane and chlorinated polyethylene samples, used in maxillofacial prostheses, was investigated in this study. Mechanical properties and thermal analysis are commonly used to determine the structural changes and mechanical strength. An aging chamber was used in order to simulate the solar radiation and assess natural aging. Compression and tensile tests were conducted on a Zwick testing machine. Durometer Shore A hardness measurements were carried out in a CV digital Shore A durometer according to ASTM D 2240. Glass transition temperature was evaluated with a differential scanning calorimeter. Simple mathematical models were developed to correlate the measured properties with irradiation time. The effect of UVA-UVB irradiation on compressive behavior affected model parameters. Significant deterioration seems to occur due to irradiation in samples.
本研究调查了UVA-UVB辐射对三种不同工业类型的聚二甲基硅氧烷和氯化聚乙烯样品机械性能的影响，这些样品用于颌面修复体。机械性能和热分析通常用于确定结构变化和机械强度。使用老化箱来模拟太阳辐射并评估自然老化。在Zwick试验机上进行压缩和拉伸试验。根据ASTM D 2240，在CV数字邵氏A硬度计上进行邵氏A硬度测量。用差示扫描量热仪评估玻璃化转变温度。建立了简单的数学模型，将测量的性能与辐照时间相关联。UVA-UVB辐射对压缩行为的影响影响了模型参数。由于辐照，样品似乎出现了显著劣化。
