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首页> 外文期刊>Journal of Applied Polymer Science >gamma Irradiation effects on optical, thermal, and mechanical properties of polysulfone/MWCNT nanocomposites in argon atmosphere
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gamma Irradiation effects on optical, thermal, and mechanical properties of polysulfone/MWCNT nanocomposites in argon atmosphere

机译：氩气中γ辐照对聚砜/ MWCNT纳米复合材料的光学，热和机械性能的影响

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Polymer-based composites find use in many nuclear and space application for their ease of fabrication, tailor made properties and light weight. Certain polymers like PTFE, unfilled polyesters and polyamides are prone to degradation in presence of high energy radiation while polymers like epoxies, polyimides, and poly-ether ether ketone have good stability to ionizing radiation. Incorporation of fillers like carbon nanotubes (CNTs) is likely to improve the radiation resistance of the polymers. In this work, polysulfone (PSU)-based nanocomposites were fabricated using multiwalled carbon nanotube (MWCNT) by solution mixing process. The morphology of the PSU/ MWCNT nanocomposites films were studied using Field Emission Scanning Electron Microscopy (FESEM). The prepared films were subjected to radiation in an argon environment (to avoid the effect of air/oxygen). Different techniques were used to understand the radiation-induced changes. Gel Permeation Chromatography (GPC) traces of neat PSU before and after exposure to radiation shows a decrease in molecular weight. Infrared spectroscopy shows changes in chemical structure. Differential Scanning Calorimetry (DSC) thermograms reveal dose-related changes. For neat PSU, a decrease in T-g was observed with increase in dose. For PSU/ MWCNT nanocomposites, the increase in MWCNT content and dose (up to 1.5 MGy) increased the T-g. Thermo Gravimetric Analysis (TGA) showed a marginal decrease in thermal stability for pristine PSU as well as PSU/MWCNT nanocomposites with irradiation. Tensile strength increased with increasing MWCNT content but decreased with dose. Elongation at break decreased with MWCNT content as well as radiation dose. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42017.
机译：聚合物基复合材料因其易于制造，量身定制的性能和轻巧的特性而在许多核和空间应用中得到使用。某些聚合物（如PTFE），未填充的聚酯和聚酰胺在高能辐射的情况下易于降解，而聚合物（如环氧树脂，聚酰亚胺和聚醚醚酮）对电离辐射具有良好的稳定性。诸如碳纳米管（CNT）之类的填料的掺入可能会改善聚合物的抗辐射性。在这项工作中，使用多壁碳纳米管（MWCNT）通过溶液混合工艺制备了基于聚砜（PSU）的纳米复合材料。使用场发射扫描电子显微镜（FESEM）研究了PSU / MWCNT纳米复合材料薄膜的形貌。所制备的膜在氩气环境中经受辐射（以避免空气/氧气的影响）。使用了不同的技术来了解辐射引起的变化。暴露于辐射前后的纯净PSU的凝胶渗透色谱（GPC）痕迹显示分子量降低。红外光谱显示化学结构的变化。差示扫描量热法（DSC）热分析图揭示了剂量相关的变化。对于纯净的PSU，观察到T-g随剂量增加而降低。对于PSU / MWCNT纳米复合材料，MWCNT含量和剂量（最高1.5 MGy）的增加会增加T-g。热重分析（TGA）显示，原始PSU以及PSU / MWCNT纳米复合材料在辐照下的热稳定性略有下降。拉伸强度随MWCNT含量的增加而增加，但随剂量的增加而降低。断裂伸长率随MWCNT含量以及辐射剂量而降低。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42017。

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