Polymerization-induced self-assembly of acrylonitrile via ICAR ATRP

Guowei Wang, Zongyu Wang, Bongjoon Lee, Rui Yuan, Zhao Lu, Jiajun Yan, Xiangcheng Pan, Yang Song, Michael R. Bockstaller, Krzysztof Matyjaszewski

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Polymerization-induced self-assembly (PISA) has attracted growing interest as facile fabrication process of polymer-based nanomaterials. However, PISA of acrylonitrile (AN) by atom transfer radical polymerization (ATRP) has remained an outstanding challenge due to the high activity of AN and poor solubility of polyacrylonitrile (PAN) in AN monomer. Here the application of PISA by using an initiators for continuous activator regeneration (ICAR) ATRP for the synthesis of PAN-based nano-objects is demonstrated. A highly active ATRP macroinitiator, methoxy-poly(ethylene oxide) 2-bromo-2-phenylacetate (mPEO-BPA) was synthesized by esterification and used also as a stabilizer. The molecular weight of the macroinitiator was found to determine the structure of self-assembled nano-objects. The high molecular macroinitiator (mPEO113-BPA) formed nano-objects with spherical or worm-like morphology, while the lower molecular weight analogue (mPEO45-BPA) resulted in precipitation in most cases due to insufficient stabilization of the nano-objects.

Original languageEnglish (US)
Pages (from-to)57-67
Number of pages11
JournalPolymer
Volume129
DOIs
StatePublished - Oct 27 2017

Bibliographical note

Funding Information:
We thank the NSF (via DMR 1501324 , DMR- 1410845 , and DMR- 1709344 ) for financial assistance. Wang, G. W. thanks the China Scholarship Council (CSC) for a fellowship.

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • ATRP
  • Acrylonitrile
  • PISA

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