This study aimed to improve the properties, such as tensile strength and gas barrier properties, of nylon/montmorillonite nanocomposite films for them to be better suited for packaging applications. In this study, organic/inorganic nanocomposite films were fabricated by melt compounding with a twin-screw extruder using a polyamide (m-xylene diamine 6 nylon; MXD6) as the polymer matrix and organic nanoclay (montmorillonite; MMT) as a filler. An electron beam (EB) was irradiated onto the fabricated nanocomposite film and its effects on the film properties were examined. Biaxial drawing and annealing were conducted after EB irradiation to investigate the orientation of molecular chains and crystallization. Transmission electron microscopy revealed that the clay nanoparticles were finely dispersed in the polymer matrix. Furthermore, the EB irradiation-induced polymer crosslinking was verified by measuring the gel content in the films. Finally, the thermal properties of the film were verified by differential scanning colorimetry (DSC), and the light transmittance was examined using a UV-visible spectrophotometer. Application of the sequential process of EB irradiation, biaxial drawing, and annealing on the MXD6/MMT-5 wt% nanocomposite films increased their tensile strength by 56% and decreased thermal shrinkage by 26%, with a minimal loss of the optical transparency. Increasing both nanoclay contents and draw ratios resulted in improved oxygen-gas barrier properties. In particular, the gas barrier property of the MXD6/MMT-5 wt% film approximately doubled compared with that of the untreated specimen. The thermal analysis by DSC revealed that the crystallinity decreased because of the addition of MMT and the EB irradiation.

这项研究旨在改善尼龙/蒙脱土纳米复合薄膜的性能，例如拉伸强度和阻气性，使其更适合包装应用。在这项研究中，有机/无机纳米复合膜通过与使用聚酰胺的双螺杆挤出机中熔融配混（制造米-二甲苯二胺6尼龙; MXD6）作为聚合物基质，有机纳米粘土（蒙脱石； MMT）作为填料。将电子束（EB）照射到制成的纳米复合膜上，并检查其对膜性能的影响。EB辐射后进行双轴拉伸和退火，以研究分子链的取向和结晶。透射电子显微镜显示粘土纳米颗粒精细地分散在聚合物基质中。此外，通过测量膜中的凝胶含量来验证EB辐射诱导的聚合物交联。最后，通过差示扫描比色法（DSC）验证膜的热性质，并使用紫外可见分光光度计检查透光率。EB照射顺序过程的应用，在MXD6 / MMT-5 wt％纳米复合材料薄膜上进行双轴拉伸和退火后，其拉伸强度提高了56％，热收缩率降低了26％，而光学透明度的损失却最小。纳米粘土含量和拉伸比的增加都提高了氧气阻隔性能。尤其是，MXD6 / MMT-5 wt％薄膜的阻气性与未处理的样品相比大约增加了一倍。通过DSC的热分析表明，由于加入MMT和EB辐射，结晶度降低。尤其是，MXD6 / MMT-5 wt％薄膜的阻气性与未处理的样品相比大约增加了一倍。DSC的热分析表明，由于加入了MMT和EB辐射，结晶度降低了。尤其是，MXD6 / MMT-5 wt％薄膜的阻气性与未处理的样品相比大约增加了一倍。通过DSC的热分析表明，由于加入MMT和EB辐射，结晶度降低。