Modification of low density polyethylene (LDPE) films by blending with Polylactic acid (PLA) and Starch (St) were carried out. Also, the study describes the comparison of two curing methods one by thermal curing at 70°C and the other is radiation curing at dose 20 kGy for the bioblend film composed of LDPE/PLA/St with composition (98%:1%:1% wt%). The efficiency of modification was determined by using different devices such as Fourier transform infrared (FTIR), mechanical, TGA, and XRD. In addition, the properties of the different bioblends were compared with other synthetic polymers such as commercial LDPE and blank LDPE. The results show that the improved properties of radiation cured method at dose 20 kGy than thermal treatment method at 70°C. The radiation cured bioblend film show good thermal stability either shown by the TGA results or against heating aging from ambient temperature up to 60°C than thermally treated blend film at 70°C. The radiation cured bioblend film found to be stable against UV‐ exposure with increasing time of exposure up to 30 min at higher wavelength (λ = 320 nm), which simulate ultraviolet radiation from sunshine. The modified properties of prepared radiation cured bioblend film are due to increase in interfacial adhesion bond between LDPE, PLA, and Starch by effect of irradiation dose at 20 kGy. The modified radiation cured bioblend films at 20 kGy can be applied in different fields such as packaging due to improvement in chemical, thermal, and mechanical properties that could partially replace the traditional petrochemical plastics.

中文翻译：

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使用聚乳酸-淀粉添加剂对聚乙烯薄膜进行改性，并研究电离辐射对老化性能的影响

通过与聚乳酸（PLA）和淀粉（St）共混进行低密度聚乙烯（LDPE）膜的改性。此外，研究还描述了两种固化方法的比较，一种是在70°C下热固化，另一种是由LDPE / PLA / St组成（98％：1％：1）的生物共混膜以20 kGy剂量进行辐射固化。 ％wt％）。通过使用不同的设备（例如傅立叶变换红外（FTIR），机械，TGA和XRD）来确定修饰的效率。另外，将不同生物共混物的性质与其他合成聚合物（例如商用LDPE和空白LDPE）进行了比较。结果表明，与在70°C下进行热处理相比，在剂量为20 kGy时辐射固化方法的性能有所改善。相比于70°C的热处理共混膜，经辐射固化的生物共混膜显示出良好的热稳定性，无论是TGA结果所显示的结果还是抗环境温度高达60°C的加热老化。发现辐射固化的生物共混物膜对于紫外线暴露是稳定的，在较高波长下，暴露时间增加长达30分钟（λ = 320 nm），可模拟阳光下的紫外线辐射。制备的辐射固化生物共混薄膜的改性性能是由于LDPE，PLA和淀粉之间的界面粘合力受到20 kGy辐照剂量的影响而增加的。改性后的20 kGy辐射固化生物共混薄膜可用于化学，热学和机械性能方面的改进，从而可以部分替代传统的石油化学塑料，从而可应用于包装等不同领域。