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首页> 外文期刊>Journal of Applied Polymer Science >Effects of thermal imidization on mechanical properties of poly(amide-co-imide)/multiwalled carbon nanotube composite films
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Effects of thermal imidization on mechanical properties of poly(amide-co-imide)/multiwalled carbon nanotube composite films

机译：热酰亚胺化对聚酰胺（酰胺-共酰亚胺）/多壁碳纳米管复合膜力学性能的影响

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In this study, experimental and numerical studies were performed to investigate the relationship among the functionalization method, weight fraction of MWCNTs, thermal imidization cycle, and mechanical properties of various PAI/MWCNT composite films. Poly(amide-co-imide)/multiwalled carbon nanotube composite films were prepared by solution mixing and film casting. The effects of chemical functionalization and weight fraction of multiwalled carbon nanotubes on thermal imidization and mechanical properties were investigated through experimental and numerical studies. The time needed to achieve sufficient thermal imidization was reduced with increasing multiwalled carbon nanotube content when compared with that of a pure poly(amide-co-imide) film because multiwalled carbon nanotubes have a higher thermal conductivity than pure poly(amide-co-imide) resin. Mechanical properties of pure poly(amide-coimide) and poly(amide-co-imide)/multiwalled carbon nanotube composite films were increased with increasing imidization time and were improved significantly in the case of the composite film filled with hydrogen peroxide treated multiwalled carbon nanotubes. Both the tensile strength and strain to failure of the multiwalled carbon nanotube filled poly(amide-co-imide) film were increased substantially because multiwalled carbon nanotube dispersion was improved and covalent bonding was formed between multiwalled carbon nanotubes and poly(amideco-imide) molecules.
机译：在这项研究中，进行了实验和数值研究，以研究功能化方法，MWCNT的重量分数，热酰亚胺化周期和各种PAI / MWCNT复合膜的力学性能之间的关系。通过溶液混合和流延制得聚（酰胺-共酰亚胺）/多壁碳纳米管复合膜。通过实验和数值研究，研究了化学功能化和多壁碳纳米管的重量分数对热酰亚胺化和力学性能的影响。与纯聚（酰胺-共酰亚胺）薄膜相比，随着多壁碳纳米管含量的增加，实现充分热酰亚胺化所需的时间减少了，因为多壁碳纳米管的导热系数高于纯聚（酰胺-共酰亚胺） ）树脂。纯聚（酰胺-共酰亚胺）和聚（酰胺-共酰亚胺）/多壁碳纳米管复合膜的机械性能随酰亚胺化时间的增加而增加，并且在填充有过氧化氢处理的多壁碳纳米管的复合膜的情况下，其机械性能得到显着改善。由于改善了多壁碳纳米管的分散性，并且在多壁碳纳米管和聚（酰胺-酰亚胺）分子之间形成了共价键，大大提高了填充多壁碳纳米管的聚（酰胺-共酰亚胺）薄膜的拉伸强度和破坏应变。 。

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