Murray Kieran A, Kennedy James E, McEvoy Brian, Vrain Olivier, Ryan Damien, Cowman Richard, Higginbotham Clement L
Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland.
Synergy Health, IDA Business & Technology Park, Sragh, Tullamore, Co. Offaly, Ireland.
Mater Sci Eng C Mater Biol Appl. 2014 Jun 1;39:380-94. doi: 10.1016/j.msec.2014.03.021. Epub 2014 Mar 16.
The radiation stability of Poly (ether-block-amide) (PEBA) blended with a multifunctional phenolic antioxidant and a hindered amide light stabiliser was examined under various temperatures, packaging and electron beam processing conditions. FTIR revealed that there were slight alterations to the PEBA before irradiation; however, these became more pronounced following irradiation. The effect of varying the temperature, packaging and processing conditions on the resultant PEBA properties was apparent. For example, rheology demonstrated that the structural properties could be enhanced by manipulating the aforementioned criteria. Mechanical testing exhibited less radiation resistance when the PEBA samples were vacuum packed and exposed to irradiation. MFI and AFM confirmed that the melting strength and surface topography could be reduced/increased depending on the conditions employed. From this study it was concluded that virgin PEBA submerged in dry ice with non-vacuum packaging during the irradiation process, provided excellent radiation resistance (20.9% improvement) in contrast to the traditional method.
研究了聚（醚嵌段酰胺）（PEBA）与多功能酚类抗氧化剂和受阻酰胺光稳定剂共混物在不同温度、包装和电子束加工条件下的辐射稳定性。傅里叶变换红外光谱（FTIR）显示，辐照前PEBA有轻微变化；然而，辐照后这些变化变得更加明显。改变温度、包装和加工条件对所得PEBA性能的影响是明显的。例如，流变学表明，通过控制上述条件可以提高结构性能。当PEBA样品真空包装并暴露于辐照时，力学测试显示其抗辐射性较低。熔体流动指数（MFI）和原子力显微镜（AFM）证实，根据所采用的条件，熔体强度和表面形貌可能会降低/增加。从这项研究得出的结论是，与传统方法相比，在辐照过程中，将纯PEBA浸没在干冰中并采用非真空包装，具有优异的抗辐射性（提高了20.9%）。
