In order to obtain the ultrahigh molecular weight polyethylene (UHMWPE) composites with high conductivity and mechanical property, an effective route of solution mixing and followed by hot‐pressing was investigated for UHMWPE composites with high content of multiwall carbon nanotubes (MWCNTs). The effect of MWCNT contents on the crystallization and melting behavior, crystal structure, electrical conductivity, and mechanical properties of MWCNT/UHMWPE composites was characterized by differential scanning calorimetry, four‐probe measurement configuration, X‐ray diffraction, and universal testing machine, respectively. The effect of MWCNTs on crystallization temperatures of UHMWPE is discussed by the heterogeneous nucleation of MWCNTs and the restriction of the macromolecular chain motion of UHMWPE by MWCNTs. The electrical conductivity of UHMWPE is significantly increased with increasing of MWCNT contents and the UHMWPE composite with the conductivity of 5649 S m⁻¹ can be obtained at the MWCNT content of 60 wt%. The influence of MWCNTs on tensile strength and modulus of UHMWPE composites is explained by the reinforce effect of MWCNTs and the lower content of UHMWPE not enough to support the structure of composites.

中文翻译：

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高含量多壁碳纳米管的超高分子量聚乙烯复合材料的制备与表征

为了获得具有高电导率和机械性能的超高分子量聚乙烯（UHMWPE）复合材料，研究了含有高含量多壁碳纳米管（MWCNTs）的UHMWPE复合材料的有效溶液混合方法，然后进行热压。分别通过差示扫描量热法，四探针测量配置，X射线衍射和通用测试机表征了MWCNT含量对MWCNT / UHMWPE复合材料的结晶和熔融行为，晶体结构，电导率和机械性能的影响。 。通过MWCNTs的异相成核和MWCNTs对UHMWPE高分子链运动的限制，讨论了MWCNTs对UHMWPE结晶温度的影响。MWCNT含量为60重量％时，可以得到^-1。MWCNTs对UHMWPE复合材料拉伸强度和模量的影响可以通过MWCNTs的增强作用和UHMWPE的较低含量不足以支持复合材料的结构来解释。