Multi-wall carbon nanotubes (MWCNTs) at 0.5 wt% to 2 wt% proportions were added to thermoplastic polyurethane (TPU) synthesized with polycarbonatediol (PCDL), 4,4’-methylene diphenyl diisocyanate (MDI), and 1,3-butanediol(1,3-BDO). To formulate a new TPU-MWCNT nanocomposite, the composite was melt-blended with a twin-screw extruder. To ensure the even dispersion of MWCNTs, dispersant (ethylene acrylic ester terpolymer; Lotader AX8900) of equal weight proportion to the added MWCNTs was also added during the blending process. Studies on the mechanical and thermal properties, and melt flow experiments and phase analysis of TPU-MWCNT nanocomposites, these nanocomposites exhibit higher tensile strength and elongation at break than neat TPU. TPU-MWCNT nanocomposites with higher MWCNT content possess higher glass-transition temperature (T_g), a lower melt index, and greater hardness. Relative to neat TPU, TPU-MWCNT nanocomposites exhibit favorable mechanical properties. By adding MWCNTs, the tensile strength of the nanocomposites increased from 7.59 MPa to 21.52 MPa, and Shore A hardness increased from 65 to 81. Additionally, TPU-MWCNT nanocomposites with MWCNTs had lower resistance coefficients; the resistance coefficient decreased from 4.97 × 10¹¹ Ω/sq to 2.53 × 10⁴ Ω/sq after adding MWCNTs, indicating a conductive polymer material. Finally, the internal structure of the TPU-MWCNT nanocomposites was examined under transmission electron microscopy. When 1.5 wt% or 2 wt% of MWCNTs and dispersant were added to TPU, the MWCNTs were evenly dispersed, with increased electrical conductivity and mechanical properties. The new material is applicable in the electronics industry as a conductive polymer with high stiffness.

将多壁碳纳米管 (MWCNT) 以 0.5% 至 2% 的比例添加到由聚碳酸酯二醇 (PCDL)、4,4'-二苯基二异氰酸酯 (MDI) 和 1,3-丁二醇合成的热塑性聚氨酯 (TPU) 中(1,3-BDO)。为了配制新的 TPU-MWCNT 纳米复合材料，该复合材料使用双螺杆挤出机进行熔融共混。为了确保多壁碳纳米管的均匀分散，在共混过程中还加入了与添加的多壁碳纳米管等重量比例的分散剂（乙烯丙烯酸酯三元共聚物；Lotader AX8900）。通过对 TPU-MWCNT 纳米复合材料的机械和热性能、熔体流动实验和相分析的研究，这些纳米复合材料比纯 TPU 具有更高的拉伸强度和断裂伸长率。具有较高 MWCNT 含量的 TPU-MWCNT 纳米复合材料具有较高的玻璃化转变温度 (T_g )、较低的熔体指数和较高的硬度。相对于纯 TPU，TPU-MWCNT 纳米复合材料表现出良好的机械性能。添加MWCNTs后，纳米复合材料的拉伸强度从7.59 MPa提高到21.52 MPa，Shore A硬度从65提高到81。此外，添加MWCNTs的TPU-MWCNT纳米复合材料电阻系数较低；电阻系数从 4.97 × 10 ¹¹ Ω/sq 降低到 2.53 × 10 ⁴添加 MWCNTs 后的 Ω/sq，表明是导电聚合物材料。最后，在透射电子显微镜下检查了 TPU-MWCNT 纳米复合材料的内部结构。当在 TPU 中加入 1.5% 或 2% 的 MWCNTs 和分散剂时，MWCNTs 分散均匀，导电性和机械性能提高。这种新材料作为具有高刚度的导电聚合物适用于电子工业。