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首页> 外文期刊>Journal of Polymers and the Environment >The Effect of Irradiation Sterilization on Poly(Lactic) Acid Films
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The Effect of Irradiation Sterilization on Poly(Lactic) Acid Films

机译：辐照灭菌对聚（乳酸）酸膜的影响

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摘要

Ionizing radiation is known to cause the deterioration of polymeric materials. In this study, the goal was to determine the effect of gamma and E-beam radiation on poly(lactic) acid (PLA) film at irradiation dosages of 1 to 30 kGy and on post-irradiated PLA after 9-months storage. The physical, chemical, mechanical, thermal, and permeability properties were investigated. Ionizing radiation of the commercial PLA film resulted in a decrease in molecular weight, crystallization temperature and melting temperature T(c)and T-m, which suggested a degradation of PLA by irradiation. Irradiation had no effect on the color of the PLA film. The surface tension of PLA was decreased by gamma irradiation at dose of 1-10 kGy and E-beam irradiation at dose of 1-5 kGy. A decrease in the tensile strength, break elongation and elastic modulus was found for the gamma and E-beam irradiated PLA. Irradiation resulted in a decrease in water vapor and carbon dioxide permeability of PLA while there was no effect on oxygen permeability.
机译：已知电离辐射导致聚合物材料的劣化。在这项研究中，目标是在9个月储存后确定γ和电子波线辐射对1至30kGy的照射剂量和辐照后PLA的影响。研究了物理，化学，机械，热和渗透性。商业PLA膜的电离辐射导致分子量的降低，结晶温度和熔融温度T（c）和T-m，这表明通过照射降解PLA。辐射对PLA膜的颜色没有影响。 PLA的表面张力通过1-10kGy的剂量为1-5kGy的电子束照射时降低。发现拉伸强度，断裂伸长和弹性模量的降低，用于伽马和电子束照射PLA。辐照导致PLA的水蒸气和二氧化碳渗透性的降低，而没有对透氧渗透性的影响。

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