Modifications taking place in ultrahigh molecular weight polyethylene (UHMWPE) films due to gamma ray radiation-induced and investigated in correlation with the applied doses. Films were irradiated in a vacuum at room temperature by a 1.25 MeV Co⁶⁰ a source with doses ranging from 0 to 300 kGg. The optical, chemical, structural, and surface morphological properties of the irradiated and unirradiated UHMWPE films were investigated by UV-Visible, FTIR, XRD, and SEM, respectively. The band gap decreases with increasing radiation dose and coloration effects have been seen at higher doses. FTIR spectra show an oscillatory behavior in the transmittance intensities without affecting in their peak positions. Number of small absorption peaks can be seen clearly which may be due to the cross-linking of the polymeric chain. No significant change in crystalline peak has been found in the X-ray diffraction pattern indicating the structural stability of the polymer. The morphology of the smooth topography of the polymer samples to change rougher one polymeric sample shows the formation of microvoids on the surface of the polymeric materials with the increase of the doses from 0 to 300 kGy.

中文翻译：

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超高分子量聚乙烯 (UHMWPE) 中的伽马射线诱导改性

由于伽马射线辐射引起的超高分子量聚乙烯 (UHMWPE) 薄膜发生改性，并与应用剂量相关联进行了研究。薄膜在室温下用 1.25 MeV Co ⁶⁰ a 源在真空中辐照，剂量范围为 0 至 300 kGg。分别通过紫外-可见光、FTIR、XRD 和 SEM 研究了辐照和未辐照 UHMWPE 薄膜的光学、化学、结构和表面形态特性。带隙随着辐射剂量的增加而降低，并且在更高剂量下观察到着色效应。FTIR 光谱显示透射强度的振荡行为，而不会影响其峰值位置。可以清楚地看到许多小的吸收峰，这可能是由于聚合物链的交联。在 X 射线衍射图中没有发现结晶峰的显着变化，表明聚合物的结构稳定性。聚合物样品的光滑形貌改变较粗糙的聚合物样品的形态表明，随着剂量从 0 增加到 300 kGy，在聚合物材料表面形成微孔。