The normal tendency of aromatic polycarbonate homopolymers and copolymers, alone or in blends with second resins, to undergo yellowing when exposed to ionizing radiation, as in certain sterilizing procedures, is diminished or eliminated by the inclusion of compounds having the effect of increasing the radiation resistance of the polymers. These compounds are, in general, characterized by a strong oxidizing action and/or reaction at high reaction rate with active species such as H radicals, OH radicals and/or hydrated electrons formed by ionizing radiation.
芳香族聚
碳酸酯均聚物和共聚物单独使用或与第二种
树脂混合使用时,在暴露于电离辐射(如在某些消毒程序中)时,通常会出现变黄的趋势,而加入具有提高聚合物抗辐射性效果的化合物后,这种趋势会减弱或消失。这些化合物一般具有强氧化作用和/或与电离辐射形成的 H 自由基、OH 自由基和/或
水合电子等活性物质发生高反应速度的反应。