Title
Self-assembly of L-proline functional thermoresponsive double hydrophlic block copolymers for aldol reaction in water: the influence of POEGA block content
Author
Kuan Liu, Weiwei Xu, Qinya Wang, Yu Tang, Weibing Sheng, Yinghua Shen, Lijuan Shi
Year
2018
Journal
Colloid and Polymer Science
Abstract
The self-assembly of L-proline functional thermoresponsive double hydrophlic block copolymers (DHBCs) can effectively catalyze aldol reaction in water. Considering the block content of copolymers influences the assemblies and catalytic activities, thermoresponsive DHBCs supported L-proline P(NIPAm-co-ProlA)-b-POEGA with different POEGA block content were prepared by reversible addition fragmentation chain transfer (RAFT) polymerization. The therm-triggered self-assemblies were investigated by dynamic light scattering (DLS) and transmission electron microscopy (TEM). Then, the resultant assemblies were used as catalysts for the aldol reaction with cyclohexanone and 4-nitrobenzaldehyde as substrates. The results indicated that P(NIPAm-co-ProlA)-b-POEGA with ca. 18 mol% of POEGA can form stable catalytic system, which maintained high selectivity and productivity of product, accompanied with satisfactory reusability.
Instrument
J-720
Keywords
Circular dichroism, Secondary structure, Polymers, Biochemistry