阅读说明：本技术 一种利用pbt聚酯化学再生为可降解聚酯的工艺方法 (Process method for chemically regenerating degradable polyester by using PBT polyester ) 是由 肖洪卫 成强 张昕 于 2021-07-15 设计创作，主要内容包括：本发明涉及一种利用PBT聚酯化学再生为可降解聚酯的工艺方法,本发明可降解聚酯为脂肪族/芳香族聚酯,是通过PBT聚酯深度醇解得到的醇解产物和脂肪族二元羧酸/脂肪族二元醇酯化物共缩聚得到的。本发明包括以下步骤：1PBT聚酯醇解；2脂肪族二元羧酸/脂肪族二元醇酯化；3酯化物共缩聚。使用本发明工艺方法,提升了PBT聚酯的利用率、再生范围；通过宏观混料,提升了不同来源、不同性能的PBT聚酯再生产品的性能稳定性、均一性；工艺流程连续化、高效化；可降解聚酯特性粘度可控、分子量分布窄、热稳定性优良；可降解聚酯满足市场柔性化需求。(The invention relates to a process method for chemically regenerating PBT (polybutylene terephthalate) into degradable polyester, wherein the degradable polyester is aliphatic/aromatic polyester and is obtained by copolycondensation of an alcoholysis product obtained by deep alcoholysis of the PBT polyester and an aliphatic dicarboxylic acid/aliphatic diol compound. The invention comprises the following steps: 1, carrying out alcoholysis on PBT polyester; 2, esterifying aliphatic dicarboxylic acid/aliphatic diol; 3, co-polycondensation of esterified compound. By using the process method, the utilization rate and the regeneration range of the PBT polyester are improved; through macroscopic material mixing, the performance stability and the uniformity of PBT polyester regenerated products with different sources and different performances are improved; the process flow is continuous and efficient; the degradable polyester has controllable intrinsic viscosity, narrow molecular weight distribution and excellent thermal stability; the degradable polyester meets the market flexibilizing requirement.)