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首页> 外文期刊>International Polymer Processing: The Journal of the Polymer Processing Society >Structure, Mechanical and Barrier Properties of Uniaxialiy Stretched Multilayer Nylon/Clay Nanocomposite Films
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Structure, Mechanical and Barrier Properties of Uniaxialiy Stretched Multilayer Nylon/Clay Nanocomposite Films

机译：单轴拉伸多层尼龙/粘土纳米复合薄膜的结构，力学和阻挡性能

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摘要

Multilayer films consisting of a core layer of nylon 6 (PA6) sandwiched between two linear low density polyethylene (LLDPE) layers by using a tie layer were produced using a semi industrial cast film extrusion line. The core layer of the films was produced from neat PA6 and PA6/clay nanocomposite resins. The films were consequently uniaxialiy stretched in machine direction. The effect of stretching on crystalline structure, orientation as well as mechanical and barrier properties of the samples were investigated. Orientation of the films for both layers: polyethylene and nylon was assessed using FTIR (Fourier Transform Infrared Spectroscopy) and it was found that clay inclusion hindered orientation of the core nylon layer. Interaction of nylon molecules with clay influences the crystalline structure for nylon/clay nanocomposite film during the stretching as it hindered crystal transformation ofy to a phase. The effect of clay interaction on phase structure was also observed in DSC (Dynamic Scanning Calorimetry) results. Stretching improved barrier to oxygen for the samples. Oxygen transmission rate was reduced about 62.5% for the films having a nylon core and 50% for those with nylon/clay core when stretched to a draw ratio of L5 and remained nearly constant for higher draw ratios up to 3. Haze of the films was reduced with stretching; however the effect was more effective for the sample with neat nylon in the core layer when compared to the nylon/clay core one. Finally, it was observed that puncture resistance of the samples was improved significantly with stretching.
机译：使用半工业流延膜挤出生产线生产多层膜，该多层膜由尼龙6（PA6）的芯层组成，该芯层通过使用粘结层夹在两个线性低密度聚乙烯（LLDPE）层之间。薄膜的芯层由纯净的PA6和PA6 /粘土纳米复合树脂制成。因此，将薄膜沿纵向单轴拉伸。研究了拉伸对样品的晶体结构，取向以及机械和阻挡性能的影响。使用FTIR（傅立叶变换红外光谱法）评估两层：聚乙烯和尼龙的膜的取向，并且发现粘土夹杂物阻碍了芯尼龙层的取向。尼龙分子与粘土的相互作用会影响拉伸过程中尼龙/粘土纳米复合膜的晶体结构，因为它阻碍了晶体向相的转变。在DSC（动态扫描量热法）结果中也观察到了粘土相互作用对相结构的影响。拉伸样品的氧气阻隔性。当拉伸至拉伸比为L5时，具有尼龙芯的薄膜的氧气透过率降低约62.5％，对于具有尼龙/粘土芯的薄膜的氧气透过率降低约50％，对于更高的拉伸比，其氧气透过率几乎保持恒定。随着拉伸减少;但是，与尼龙/粘土芯相比，芯层中含有纯尼龙的样品的效果更有效。最后，观察到样品的抗穿刺性随着拉伸而显着提高。

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