| 第一作者： | Wang, ZY (Wang, Zhen-Yu); Xu, GQ (Xu, Guang-Qiang); Zhou, L (Zhou, Li); Lv, CD (Lv, Cheng-Dong); Yang, RL (Yang, Ru-Lin); Dong, BZ (Dong, Bing-Zhe); Wang, QG (Wang, Qing-Gang); |
|---|---|
| 联系作者： | Wang, ZY (Wang, Zhen-Yu); Xu, GQ (Xu, Guang-Qiang); Zhou, L (Zhou, Li); Lv, CD (Lv, Cheng-Dong); Yang, RL (Yang, Ru-Lin); Dong, BZ (Dong, Bing-Zhe); Wang, QG (Wang, Qing-Gang); |
| 发表年度： | 2021 |
| 期： | 6 |
| 卷： | 39 |
| 页： | 709-715 |
| 摘要： | The isoselective ring-opening polymerization of racemic lactide was achieved by combining N-heterocyclic olefin (NHO) with mono(thio)ureas or bis(thio)ureas as catalytic systems. The polymerization process shows high stereoselectivity, controllability and reactivity, delivering multi-block isotactic polylactides with high chain-end fidelity and narrow molecular weight distributions. The enhancement of catalytic performance was observed in the following order: bisthiourea (DTU) < monothiourea (TU) < bisurea (DU) < urea (U). The highest P-m (probability of forming a meso dyad) = 0.91 was observed at -70 degrees C when using NHO/U1 catalytic system and the high stereoselectivity was attributed to chain-end control mechanism. |
| 刊物名称： | CHINESE JOURNAL OF POLYMER SCIENCE |
| 影响因子： | 2.804 |
| 全文链接： | https://link.springer.com/article/10.1007/s10118-021-2535-x |
