This study reports the effect of exposure to liquid carbon dioxide on the mechanical properties of selected medical polymers. The tensile strengths and moduli of fourteen polymers are reported. Materials were exposed to liquid CO(2), or CO(2) + trace amounts of aqueous H(2)O(2), at 6.5 MPa and ambient temperature. Carbon dioxide uptake, swelling, and distortion were observed for the more amorphous polymers while polymers with higher crystallinity showed little effect from CO(2) exposure. Changes in tensile strength were not statistically significant for most plastics, and most indicated good tolerance to liquid CO(2). These results are relevant to evaluating the potential of liquid CO(2)-based sterilization technology.

中文翻译：

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医用级聚合物与高浓度 CO(2) 的相容性。

本研究报告了接触液态二氧化碳对选定医用聚合物的机械性能的影响。报道了十四种聚合物的拉伸强度和模量。材料暴露于液态 CO(2) 或 CO(2) + 痕量的 H(2)O(2) 水溶液，在 6.5 MPa 和环境温度下。更无定形的聚合物观察到二氧化碳吸收、膨胀和变形，而具有较高结晶度的聚合物显示出 CO(2) 暴露的影响很小。对于大多数塑料，拉伸强度的变化在统计上并不显着，并且大多数表明对液态 CO(2) 具有良好的耐受性。这些结果与评估基于液体 CO(2) 的灭菌技术的潜力有关。