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对稀土固体超强酸SO_4~(2-)/TiO_2-Ce~(4+)催化剂直接法催化合成聚乳酸反应机理进行了研究,实验结果表明:SO_4~(2-)/TiO_2-Ce~(4+)直接法催化剂合成聚乳酸的聚合机理是酸性聚合,酸性越强所合成聚乳酸的分子量越高。
The reaction mechanism of polylactic acid catalyzed by SO_4 ~ (2 -) / TiO_2-Ce ~ (4 +) catalyst was studied. The experimental results showed that SO_4 ~ (2 -) / TiO_2-Ce ~ +) The direct polymerization catalyst for the synthesis of polylactic acid polymerization mechanism is acidic polymerization, the more acidic the higher the molecular weight of the synthesized polylactic acid.