In this work, an experimental design was applied in the injection molding process of polycaprolactone (PCL), aiming to evaluate the mechanical properties (impact strength, tensile strength and Shore D Hardness), thermal (differential scanning calorimetry (DSC)) and thermomechanical (heat deflection temperature (HDT)), in PCL injected specimens. A type 2ⁿ planning was applied, with n = 3 and central point, having the input factors: processing temperature profile, mold temperature and injection flow. The results showed that the DSC curves presented a complex mechanism during crystallization, suggesting that depending on the processing conditions a high degree of crystallinity can be obtained. When using a higher processing temperature and a higher injection flow, there is an increase in the mass of the PCL parts. The impact strength is more expressive when a higher injection flow and a lower processing temperature are applied, reaching values around 260 J/m. The mold temperature impairs the elongation at the break of the PCL, while the elastic modulus was governed by the degree of crystallinity. A deleterious effect on HDT was observed with increased injection flow, suggesting that this parameter negatively affects thermomechanical resistance. The use of experimental design in the processing of PCL is important, since it is possible to optimize properties with the ideal conditions of injection molding.

在这项工作中，实验设计应用于聚己内酯（PCL）的注射成型过程中，旨在评估机械性能（冲击强度，拉伸强度和肖氏D硬度），热（差示扫描量热法（DSC））和热机械性能（热变形温度（HDT）），在PCL注入的样品中。A型2 ⁿ应用n = 3和中心点的规划，并具有以下输入因素：加工温度曲线，模具温度和注射流量。结果表明，DSC曲线在结晶过程中呈现出复杂的机理，这表明根据加工条件可以获得较高的结晶度。当使用较高的处理温度和较高的注射流量时，PCL零件的质量会增加。当施加更高的注射流量和更低的加工温度时，冲击强度更具表现力，达到260 J / m左右的值。模具温度损害了PCL断裂时的伸长率，而弹性模量则取决于结晶度。随着注射流量的增加，对HDT产生了有害影响，这表明该参数会对热机械阻力产生负面影响。在PCL的处理中使用实验设计非常重要，因为可以在理想的注塑条件下优化性能。