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Title: Sulfonated Amphiphilic Block Copolymers: Synthesis, Self-Assembly in Water, and Application as Stabilizer in Emulsion Polymerization

Source: Macromolecules 2009, 42, 5080-5090; 2009

Author(s)Zhang, Jiguang; Dubay, Matthew R.; Houtman, Carl J.; Severtson, Steven J.

Publication Year: 2009  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4709-4A

Abstract: Described is the synthesis of diblock copolymers generated via sequential atom transfer radical polymerization (ATRP) of poly(n-butyl acrylate) (PnBA) followed by chain augmentation with either sulfonated poly(2-hydroxyethyl methacrylate) (PHEMA) or poly(2-hydroxyethyl acrylate) (PHEA) blocks. TRP of PHEMA or PHEA from PnBA macroinitiator was conducted in acetone/methanol 50:50 (v/v) and produced diblock copolymers of low PDI (<1.3). Hydroxyl functional groups were converted to sulfonate through esterification using excess 2-sulfobenzoic acid cyclic anhydride (SBA). TEM images of aqueous block copolymer solutions reveal an array of polymer micelle morphologies including monodisperse spheres, cylinders, and cylinder aggregates. Surface tensions and critical micelle concentrations appear to be dependent more on hydrophile structure as opposed to its length. Application of the synthesized block copolymers as stabilizers for batch emulsion polymerization of n-butyl acrylate showed the polymeric surfactant effectively stabilizes latex particles and produces a lower polydispersity when compared with commonly applied commercial emulsifiers.

Keywords: Esterification; acetone; methanol; diblock copolymers; block copolymers; hydroxyl group; sulfonates; polymerization; surface active agents; latex; polymers; atom transfer radical polymerization; ATRP; Poly(n-butyl acrylate); PNBA; Sulfonated poly(2-hydroxyethyl acrylate); PHEA; 2-sulfobenzoic acid cyclic anhydride; SBA; emulsifiers; amphiphilic additives; synthesis

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 1,193 kb(s)

Date posted: 05/17/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 31910
Current FPL Scientist associated with this product
Houtman, Carl J.
Chemical Engineer

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