Injection moulding of micropillar arrays offers a fast and inexpensive method for manufacturing sensors, optics, lab-on-a-chip devices, and medical devices. Material choice is important for both the function of the device and manufacturing optimisation. Here, a comparative study of poly(methyl methacrylate) (PMMA) and cyclic olefin copolymer (COC) injection moulding of micropillar arrays is presented. These two polymers are chosen for their convenient physical, chemical, and optical properties, which are favoured for microfluidic devices. COC is shown to replicate the mould’s nano/microstructures more precisely than PMMA. COC successfully forms a micropillar array (250 mm diameter; 496 mm high) and closely replicates surfaces with nano-scale roughness (30–120 nm). In the same moulds, PMMA forms lens arrays (not true pillars) and smoother surfaces due to the incomplete filling for all parameters studied. Thus, COC offers finer structural detail for devices that require micro and nano-structured features, and may be more suited to injection moulding microfluidic devices.

微柱阵列的注塑成型为制造传感器、光学器件、芯片实验室设备和医疗设备提供了一种快速且廉价的方法。材料选择对于设备的功能和制造优化都很重要。在这里，介绍了微柱阵列的聚（甲基丙烯酸甲酯）（PMMA）和环烯烃共聚物（COC）注塑成型的比较研究。选择这两种聚合物是因为它们方便的物理、化学和光学特性，这些特性有利于微流体装置。COC 显示出比 PMMA 更精确地复制模具的纳米/微结构。COC 成功地形成了一个微柱阵列（直径 250 毫米；高 496 毫米）并紧密复制具有纳米级粗糙度（30-120 纳米）的表面。在相同的模具中，由于所有研究参数的填充不完整，PMMA 形成透镜阵列（不是真正的柱子）和更光滑的表面。因此，COC 为需要微米和纳米结构特征的设备提供了更精细的结构细节，并且可能更适合注塑微流体设备。