Affordable Access

Access to the full text

End Group Stability of Atom Transfer Radical Polymerization (ATRP)-Synthesized Poly( N -isopropylacrylamide): Perspectives for Diblock Copolymer Synthesis

Authors
  • Herberg, Artjom
  • Yu, Xiaoqian
  • Kuckling, Dirk
Type
Published Article
Journal
Polymers
Publisher
MDPI AG
Publication Date
Apr 13, 2019
Volume
11
Issue
4
Identifiers
DOI: 10.3390/polym11040678
PMID: 31013945
PMCID: PMC6523552
Source
PubMed Central
Keywords
License
Green

Abstract

Studies on the end group stability of poly( N -isopropylacrylamide) during the atom transfer radical polymerization (ATRP) process are presented. Polymerization of N -isopropylacrylamide was conducted in different solvents using a copper(I) chloride/Me6Tren catalyst complex. The influence of the ATRP solvent as well as the polymer purification process on the end group stability was investigated. For the first time, mass spectrometry results clearly underline the loss of ω end groups via an intramolecular cyclization reaction. Furthermore, an ATRP system based on a copper(I) bromide/Me6Tren catalyst complex was introduced, that showed not only good control over the polymerization process, but also provided the opportunity of block copolymerization of N -isopropylacrylamide with acrylates and other N -substituted acrylamides. The polymers were characterized using 1H-NMR spectroscopy and size exclusion chromatography. Polymer end groups were determined via ESI-TOF mass spectrometry enhanced by ion mobility separation (IMS).

Report this publication

Statistics

Seen <100 times