Polymerization-induced self-assembly (PISA) using ICAR ATRP at low catalyst concentration

Guowei Wang, Michael Schmitt, Zongyu Wang, Bongjoon Lee, Xiangcheng Pan, Liye Fu, Jiajun Yan, Sipei Li, Guojun Xie, Michael R. Bockstaller, Krzysztof Matyjaszewski

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

Polymerization-induced self-assembly (PISA) was achieved by conducting an initiators for continuous activator regeneration atom transfer radical polymerization (ICAR ATRP) at low ppm of copper catalyst concentration. A poly(oligo(ethylene oxide) methyl ether methacrylate)50 (POEOMA50) macroinitiator and stabilizer was synthesized by an aqueous ICAR ATRP using CuIICl2/tris(pyridin-2-ylmethyl)amine (TPMA) complex. Subsequently, the dispersion polymerization of benzyl methacrylate (BnMA) in ethanol was realized with a CuIIBr2/TPMA complex either at room temperature or at 65 °C using V-70 or AIBN as radical initiators, respectively. The effect of catalyst concentration, radical initiators, targeted degree of polymerization (DP) of PBnMA, solids content, and temperature on the molecular characteristics and self-assembly behavior of block copolymers POEOMA-PBnMA was evaluated by gel permeation chromatography (GPC), transmission electron microscopy (TEM), and dynamic light scattering (DLS). Block copolymers assembled into spheres, wormlike aggregates, and vesicles with diameters ranging from 100 to 600 nm, depending on the temperature, solids content, and the DP of PBnMA. The effect of the temperature on the polymerization behavior and morphological evolution was attributed to the temperature-dependent plasticization of the core-forming PBnMA block above and below its glass transition temperature (Tg = 54 °C).

Original languageEnglish (US)
Pages (from-to)8605-8615
Number of pages11
JournalMacromolecules
Volume49
Issue number22
DOIs
StatePublished - Nov 22 2016

Fingerprint Dive into the research topics of 'Polymerization-induced self-assembly (PISA) using ICAR ATRP at low catalyst concentration'. Together they form a unique fingerprint.

  • Cite this

    Wang, G., Schmitt, M., Wang, Z., Lee, B., Pan, X., Fu, L., Yan, J., Li, S., Xie, G., Bockstaller, M. R., & Matyjaszewski, K. (2016). Polymerization-induced self-assembly (PISA) using ICAR ATRP at low catalyst concentration. Macromolecules, 49(22), 8605-8615. https://doi.org/10.1021/acs.macromol.6b01966