Controllable Ring-opening Polymerization ofδ-Valerolactone Catalyzed by Quinolinyl-Urea/MTBD Systems  

作　　者：Xin-Yu Liu Liang Zhu Su-Yun Jie Bo-Geng Li 

机构地区：[1]State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310058,China

出　　处：《Chinese Journal of Polymer Science》2024年第8期1103-1110,共8页高分子科学（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2016YFC1100801)。

摘　　要：Due to their excellent biocompatibility and biodegradability,aliphatic polyesters are widely used in the biomedical,packaging and agricultural fields,which are usually accessed by the ring-opening polymerization(ROP)of lactones and the catalysts particularly play an important role.Herein a series of quinolinyl-urea catalysts have been synthesized via the reaction between isocyanate and aminoquinoline with an amino group at different substitution positions and characterized.In combination with 7-methyl-1,5,7-triazabicyclo[4,4,0]dec-5-ene(MTBD)as a cocatalyst and benzyl alcohol(BnOH)as an initiator,1-(3,5-bis(trifluoromethyl)phenyl)-3-(quinolin-3-yl)urea(3-QU)was observed to be most active for the ROP ofδ-valerolactone(δ-VL).The polymerization conditions were optimized by varying the type of organic base,catalyst concentration and reaction temperature.By changing the ratio of[M]_0/[I],linear polyvalerolactones(PVLs)with different molecular weights and narrow molecular weight distribution were prepared.The kinetic and chain extension experiments were carried out to prove the"living"/controllable feature.And the NMR experiments were used to support the proposal of possible mechanism.

关 键 词：Quinolinyl-urea Ring-opening polymerization PVL 

分 类 号：O631.5[理学—高分子化学] O643.36[理学—化学]