Petroleum-derived mesophase pitch and polyethylene terephthalate (PET) were blended and melt-extruded to create precursor fibers. The raw blends, heat treated bulk materials, and fibers were all examined to determine compatibility between petroleum-derived mesophase pitch and PET. Thermal investigation of the raw blends showed the presence of both the pitch and PET in separate phases suggesting no interactions had occurred during mixing. The heat-treated bulk material also showed multiple phases under polarized light while Fourier-transform infrared spectroscopy indicated that the two materials did not fully separate during extrusion. Elemental scans of the precursor fibers showed areas of high oxygen concentrations averaging 11.7% as compared to a 2% oxygen concentration across the majority of the cross-section. Tensile tests of the precursor fibers showed a decrease in average modulus as compared to pure pitch fibers; however, the depressed modulus of the blended fibers was found to be independent of the PET weight percentage. Fibers created from 5 wt.% PET had a strength value within 10% of pure pitch and a 200% increase in modulus and were therefore found to be the most promising for carbon fiber production. Pure pitch and the 5 wt.% PET fibers were stabilized and carbonized to 1000 °C. Both types of fibers were tensile tested to determine their strength and stiffness. Pure pitch carbon fibers maintained a higher strength while the carbon fibers produced from 5 wt.% PET possessed a stiffer modulus which can be attributed to their radial microstructure.

将石油衍生的中间相沥青和聚对苯二甲酸乙二醇酯 (PET) 共混并熔融挤出，制成前体纤维。对原始混合物、热处理散装材料和纤维进行了检查，以确定石油衍生的中间相沥青和 PET 之间的相容性。对原始混合物的热研究表明，沥青和 PET 均存在于不同的相中，表明混合过程中没有发生相互作用。经过热处理的块体材料在偏振光下也显示出多相，而傅里叶变换红外光谱表明两种材料在挤出过程中没有完全分离。前体纤维的元素扫描显示，氧浓度高的区域平均为 11.7%，而大部分横截面的氧浓度为 2%。前体纤维的拉伸测试表明，与纯沥青纤维相比，平均模量有所下降；然而，我们发现共混纤维的降低模量与 PET 重量百分比无关。由 5 wt.% PET 制成的纤维的强度值在纯沥青的 10% 以内，模量增加了 200%，因此被发现是最有前途的碳纤维生产。纯沥青和 5 wt.% PET 纤维经过稳定化并碳化至 1000 °C。对两种类型的纤维进行拉伸测试以确定它们的强度和刚度。纯沥青碳纤维保持了较高的强度，而由 5 wt.% PET 生产的碳纤维则具有较高的模量，这可归因于其径向微观结构。研究发现，混纺纤维的降低模量与 PET 重量百分比无关。由 5 wt.% PET 制成的纤维的强度值在纯沥青的 10% 以内，模量增加了 200%，因此被发现是最有前途的碳纤维生产。纯沥青和 5 wt.% PET 纤维经过稳定化并碳化至 1000 °C。对两种类型的纤维进行拉伸测试以确定它们的强度和刚度。纯沥青碳纤维保持了较高的强度，而由 5 wt.% PET 生产的碳纤维则具有较高的模量，这可归因于其径向微观结构。研究发现，混纺纤维的降低模量与 PET 重量百分比无关。由 5 wt.% PET 制成的纤维的强度值在纯沥青的 10% 以内，模量增加了 200%，因此被发现是最有前途的碳纤维生产。纯沥青和 5 wt.% PET 纤维经过稳定化并碳化至 1000 °C。对两种类型的纤维进行拉伸测试以确定它们的强度和刚度。纯沥青碳纤维保持了较高的强度，而由 5 wt.% PET 生产的碳纤维则具有较高的模量，这可归因于其径向微观结构。% PET 的强度值比纯沥青低 10%，模量增加 200%，因此被认为是最有前途的碳纤维生产材料。纯沥青和 5 wt.% PET 纤维经过稳定化并碳化至 1000 °C。对两种类型的纤维进行拉伸测试以确定它们的强度和刚度。纯沥青碳纤维保持了较高的强度，而由 5 wt.% PET 生产的碳纤维则具有较高的模量，这可归因于其径向微观结构。% PET 的强度值比纯沥青低 10%，模量增加 200%，因此被认为是最有前途的碳纤维生产材料。纯沥青和 5 wt.% PET 纤维经过稳定化并碳化至 1000 °C。对两种类型的纤维进行拉伸测试以确定它们的强度和刚度。纯沥青碳纤维保持了较高的强度，而由 5 wt.% PET 生产的碳纤维则具有较高的模量，这可归因于其径向微观结构。