Immortal copolymerization of lactide (LA) and 2-methyl-2-benzyloxycarbonyl-1,3-trimethylene carbonate (MBC) affords random, tapered, and diblock microstructured poly(lactide-co-carbonate)s. Subsequent debenzylation of these poly(LA-co-MBC)s by Pd/C catalytic hydrogenation gives poly(LA-co-MCC)s containing carboxylic acid, which show controlled degradation performance during in vitro hydrolytic degradation experiments. The degradation rates of poly(LA-co-MCC)s are proved for the first time to be affected significantly by lactide–carbonate linkages in the main chains, following the trend of lactide–carbonate unit (L–C/C–L)>carbonate–carbonate unit (C–C)>lactide–lactide unit (L–L). The resultant hydrolysis products are the precursors for synthesizing the corresponding monomers. Therefore, the degradable and recyclable materials are accomplished.

中文翻译：

---

链序列控制的聚丙交酯-共碳酸酯的降解行为

丙交酯（LA）和2-甲基-2-苄氧羰基-1,3-三亚甲基碳酸酯（MBC），得到随机的，锥形的，和二嵌段微结构化的聚（丙交酯的共聚不朽共-碳酸酯）类。随后通过Pd / C催化加氢对这些聚（LA- co- MBC）进行脱苄基作用，得到含有羧酸的聚（LA- co- MCC），在体外水解降解实验中显示出受控的降解性能。聚（LA- co）的降解率继丙交酯-碳酸酯单元（LC-C / C-L）>碳酸酯-碳酸酯单元（C-C）的趋势后，-MCC）首次被主链中的丙交酯-碳酸酯键显着影响。 ）>丙交酯-丙交酯单位（L-L）。所得的水解产物是用于合成相应单体的前体。因此，完成了可降解和可回收的材料。