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Synthesis and characterization of temperature-responsive block copolymers using macromonomeric initiator

Melahat Göktaş

Department of Science Education, Yüzüncü Yıl University, Van, Turkey

 

E-mail: melahat_36@hotmail.com

Received: 30 November 2019  Accepted: 24 January 2020

Abstract:

Temperature-responsive block copolymers, poly(2-(dimethyl amino)ethyl methacrylate)-b-poly(N-isopropylacrylamide) [PDMAEMA-b-PNIPAM], have been prepared by a combination of the redox polymerization and the reversible addition-fragmentation chain transfer (RAFT) polymerization. For this purpose, poly-N-isopropylacrylamide (PNIPAM-Cl) was acquired by redox polymerization of N-isopropylacrylamide (NIPAM) using 2-(2-chloroethoxy)ethanol and Ce(NH4)2(NO3)6 was used as a catalyst. Poly(DMAEMA-b-NIPAM) temperature-responsive copolymers were prepared via RAFT of 2-(dimethyl amino)ethyl methacrylate) (DMAEMA) in the presence of macromonomeric initiator (macro-CTA) which was obtained via the reaction of PNIPAM-Cl with the potassium salt of ethyl xanthogenate. The synthesized temperature-responsive block copolymer was characterized using multi-instruments and methods such as nuclear magnetic resonance spectroscopy, F(f)ourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis, differential scanning calorimetry, scanning electron microscope and UV–Vis.

Keywords: Reversible addition-fragmentation chain transfer; Redox polymerization; Macromonomeric initiator (macro-CTA); N-isopropylacrylamide; 2-(Dimethyl amino)ethyl methacrylate

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01074-9

 

Chemical Papers 74 (7) 2297–2307 (2020)

Saturday, October 23, 2021

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