目的 综述聚对苯二甲酸−己二酸丁二醇酯/聚乳酸(PBAT/PLA)共混体系反应性增容机理的研究进展。方法 通过归纳PBAT/PLA体系的4类反应性增容机理，即催化酯交换反应，引发支化和交联反应，端羟基与酸酐反应，端羧基与氨基反应。比较各类反应性增容方式的优缺点，展望PBAT/PLA体系反应性增容的发展前景。结果 采用多种反应性增容方式可有效提高相容性，但其增容机理各不相同。酯交换催化剂可催化PBAT与PLA发生酯交换反应，生成PBAT−PLA共聚物，达到增容的目的。过氧化物可分解为活性自由基，引发生成PBAT−PLA共聚物。含有二酸酐基团或多氨基的增容剂，可分别与聚酯的端羟基、端羧基反应生成PBAT−PLA共聚酯。结论 这些增容剂与聚酯的端基发生反应，在一定程度上抵消了热降解造成的分子量降低。在过量添加带有多个活性官能团的增容剂时，还可能发生支化、交联反应。在反应性增容过程中，还伴随着热老化、水解、酯化、酯交换等不可控反应的发生。

The work aims to review the research progress of the reactive compatibilization mechanism of PBAT/PLA blend system. Five types of reactive compatibilization mechanisms of PBAT/PLA system were summarized, including catalyzing transesterification reaction, initiating branching and crosslinking reaction, reaction between terminal hydroxyl group and acid anhydride, and reaction between terminal carboxyl group and amino group. The advantages and disadvantages of various reactive compatibilization methods were compared, and the development prospect of reactive compatibilization of PBAT/PLA system was prospected. The compatibility could be effectively improved by multiple reactive compatibilization methods, but the mechanisms of various reactive compatibilization were different. The transesterification catalyst could catalyze the transesterification reaction between PBAT and PLA to generate PBAT-PLA copolyester to achieve the purpose of increasing compatibility. Peroxide could decompose into active free radicals and initiate the formation of PBAT-PLA copolyester. The compatibilizers with dianhydride groups and amino groups could react with the —OH and —COOH respectively to form PBAT-PLA copolyester. These compatibilizers react with terminal groups of polyesters to offset the decrease in molecular weight caused by thermal degradation to a certain extent. The excess compatibilizers with more than two functional groups may cause branching or crosslinking reaction. The reactive compatibilization is also accompanied by uncontrollable reactions, such as thermal aging, hydrolysis, esterification, and transesterification.