Imidodiphosphoric acid as a bifunctional catalyst for the controlled ring-opening polymerization of δ-valerolactone and ε-caprolactone

被引:53
作者
Kan, Suli [1 ]
Jin, Yu [1 ]
He, Xiaojiang [1 ]
Chen, Jia [1 ]
Wu, Hao [1 ]
Ouyang, Pingkai [1 ]
Guo, Kai [1 ]
Li, Zhenjiang [1 ]
机构
[1] Nanjing Univ Technol, Coll Biotechnol & Pharmaceut Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Jiangsu, Peoples R China
基金
国家高技术研究发展计划(863计划); 高等学校博士学科点专项科研基金;
关键词
N-HETEROCYCLIC CARBENES; ACTIVATED MONOMER; ORGANIC CATALYSTS; CATIONIC-POLYMERIZATION; LIVING POLYMERIZATION; LACTIDE; BLOCK; ORGANOCATALYSTS; POLYLACTONES;
D O I
10.1039/c3py00667k
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Imidodiphosphoric acid (IDPA) catalyzed ring-opening polymerization (ROP) of delta-valerolactone (delta-VL) and epsilon-caprolactone (epsilon-CL) with benzyl alcohol (BnOH) as the initiator in toluene at room temperature was investigated. The overall conversions of delta-VL and epsilon-CL to poly(delta-valerolactone) (PVL) and poly(epsilon-caprolactone) (PCL), respectively, were more than 90%. Experimental results indicated the living nature of the polymerizations. The polymerization reactions with different monomer-to-initiator ratios proceeded homogeneously to afford PVL and PCL with controlled molecular weight and narrow polydispersities. H-1 NMR and MALDI-TOF MS measurements demonstrated the quantitative incorporation of the initiator in the polymer chains. The controlled/living character of the polymerization was examined thoroughly by the kinetics and chain extension experiments, indicating that the IDPA-catalyzed ROPs of delta-VL and epsilon-CL proceeded through a living mechanism.
引用
收藏
页码:5432 / 5439
页数:8
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