This study aims to develop dyeable modified polypropylene (PP) granules with disperse dye. The optimal dyeable modified PP granule process used polyester as a mixed copolymer. The purpose was to overcome the excessive difference between the polyester material melting point and PP melting point. The development of a low-melting modified co-polybutylene adipate terephthalate (Co-PBAT) was the key point. After the low-melting modified Co-PBAT was presented, PP and a PP grafting maleic anhydride compatibilizer were made into a composite by dual-screw mixing process. The disperse dye dyeability was reached by the molecular behavior of the Co-PBAT chain segment. The prepared material was applied to explore the thermal properties of modified ester pellets and the functional group was verified by Fourier infrared spectroscopy. In this study, the Taguchi method and principal component analysis were used to optimize the process parameter design of two quality characteristics; namely, the color strength and the polymer melt flow index (MFI). According to the results, the multi-quality optimization of the ester pellets consisted of a modified Co-PBAT melting point of 170°C, the modified Co-PBAT content of 9 wt%, the compatibilizer content of 3 wt%, and the mixing temperature of 205°C. The MFI of the regular PP polymer was 28.1 g/10 min, the color strength was 100 K/S. For the optimal process, the MFI of the PP/Co-PBAT dyeable granules was 37.88 g/10 min, and the color strength was 121.31 K/S. It could be observed that the developed polymer had good circulating workability and color strength.

这项研究旨在开发具有分散染料的可染改性聚丙烯（PP）颗粒。最佳的可染色改性PP颗粒工艺使用聚酯作为混合共聚物。目的是克服聚酯材料熔点和PP熔点之间的过大差异。关键在于开发低熔点改性的己二酸对苯二甲酸丁二醇酯（Co-PBAT）。提出低熔点改性Co-PBAT后，通过双螺杆混合工艺将PP和PP接枝马来酸酐增容剂制成复合材料。通过Co-PBAT链段的分子行为可以达到分散染料的可染性。将制备的材料用于研究改性酯颗粒的热性能，并通过傅立叶红外光谱法验证了官能团。在这个研究中，采用田口法和主成分分析法优化了两种质量特性的工艺参数设计。即，色强度和聚合物熔体流动指数（MFI）。根据结果​​，酯粒的多质量优化包括改性Co-PBAT熔点为170°C，改性Co-PBAT含量为9 wt％，增容剂含量为3 wt％和混合温度为205°C。普通PP聚合物的MFI为28.1 g / 10 min，色强度为100 K / S。对于最佳工艺，PP / Co-PBAT可染色颗粒的MFI为37.88 g / 10 min，色强度为121.31 K / S。可以观察到，所开发的聚合物具有良好的循环加工性和色强度。