Synthesis and characterization of hyperbranched poly(ester-amine) by Michael addition polymerization

Designed Monomers and Polymers
Miao SunZhirong Xin

Abstract

A series of tertiary amine-based hyperbranched poly(amine-ester)s have been synthesized by Michael addition polymerization of trifunctional monomer, TMEA and difunctional monomer, diacylates in chloroform, and the resultant polymers were subsequently treated with mercaptoethenol or 1-dodecanethiol for improving stability in storage. The caption efficiency of mercaptoethanol is much better than that of 1-dodecanthiol. Kinetic study reveals that the thiol group is consumed faster than the acrylate group when the polymerization with feed molar ratio of diacrylate/TMEA = 2/1 was carried out. At initial polymerization, monomer conversion increases fast, but the molecular weights increase slowly and sharp increase of the molecular weight occurs at the final polymerization. The hyperbranched polymers were well characterized by1H NMR spectra and TD-SEC, and DBs of the polymers obtained are between 0.6 and 0.82, as well as the molar ratios of diacrylate/TMEA in the hyperbranched polymers are between 1.60 and 1.82. The fluorescence efficiency and quantum yields of HypET20, HypHT24 and HypDT24 has the following sequence: HypET20 > HypHT24 > HypDT24.

References

Aug 6, 2005·Journal of Controlled Release : Official Journal of the Controlled Release Society·Zhiyuan ZhongJan Feijen
Oct 29, 2010·Journal of Drug Targeting·Ulrik L RahbekKenneth A Howard
Dec 12, 2012·Journal of the American Chemical Society·Miao SunCai-Yuan Pan

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Citations

Jun 6, 2018·Macromolecular Rapid Communications·Cansu AydoganYusuf Yagci

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Methods Mentioned

BETA
transfection
Nuclear magnetic resonance
size exclusion chromatography
NMR

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