The effect of drawn orientation on crystalline fluorinated polymer/carbon nanotube nanohybrids was investigated. Single-walled carbon nanotubes (SWCNTs) were surface-modified with long-chain phosphonic acids, thus imparting heat-resistant/non-desorption properties. Polyvinylidene fluoride (PVDF) was used as the crystalline fluorinated polymer and a polypropylene (PP) matrix as the crystalline hydrogenated polymer, for comparison. In the nanocomposite preparation, PVDF was combined with phosphonic acid-modified SWCNT containing fluorocarbon chains, and PP was combined with phosphonic acid-modified SWCNT containing hydrocarbon chains. Nanocomposite preparations of organo-SWCNTs with an affinity for the polymer matrix were achieved by a simple melt-compound method. These nanocomposites were uniaxially drawn at high temperatures near its melting point, and the organo-SWCNTs were aligned in the polymer matrix along the drawn direction. The lamellae in the fluorinated polymer-based nanohybrids were aligned parallel to the drawn direction at 5 × drawing, and converted to a herringbone arrangement with a left–right tilting at 7 × to 9 × drawings. As a result, it was clarified that the addition of a small amount of SWCNT leads to an improvement of crystallinity, crystallization temperature, lamella thickness, and mechanical properties of the nanocomposites.

中文翻译：

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单轴取向对使用含氢或氟碳化合物的膦酸酯改性单壁碳纳米管的聚合物/填料纳米复合材料的影响

研究了拉伸取向对结晶氟化聚合物/碳纳米管纳米杂化物的影响。单壁碳纳米管 (SWCNT) 用长链膦酸进行表面改性，从而赋予耐热/非解吸特性。聚偏二氟乙烯 (PVDF) 用作结晶氟化聚合物，聚丙烯 (PP) 基质用作结晶氢化聚合物，以进行比较。在纳米复合材料的制备中，PVDF 与含碳氟链的膦酸改性 SWCNT 结合，PP 与含碳氢链的膦酸改性 SWCNT 结合。通过简单的熔融复合方法制备了对聚合物基质具有亲和力的有机单壁碳纳米管的纳米复合材料。这些纳米复合材料在接近其熔点的高温下被单轴拉伸，并且有机单壁碳纳米管在聚合物基体中沿拉伸方向排列。氟化聚合物基纳米杂化物中的薄片以 5 倍拉伸平行于拉伸方向排列，并转换为左右倾斜 7 到 9 倍拉伸的人字形排列。结果表明，添加少量单壁碳纳米管可以提高纳米复合材料的结晶度、结晶温度、薄片厚度和力学性能。