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- Title
In Situ Use of Aqueous RAFT Prepared Poly(2-(diethylamino)ethyl methacrylate) as a Stabilizer for Preparation of CO<sub>2</sub> Switchable Latexes.
- Authors
Shirin‐Abadi, Abbas Rezaee; Jessop, Philip G.; Cunningham, Michael F.
- Abstract
Poly(2-(diethylamino)ethyl methacrylate) (PDEAEMA) macroinitiator is prepared in water by aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization under CO2 atmosphere, and then used directly as a stabilizer in emulsion polymerization, without requiring further purification, to yield CO2-switchable latexes of poly(methyl methacrylate) (PMMA) and polystyrene (PS). Chain extension of the PDEAEMA macroinitiator with styrene (S) leads to the in situ formation of poly(DEAEMA- b-S) diblock copolymers in a one-pot process. The final latexes are pH and CO2-responsive and can be coagulated by N2 bubbling and subsequently redispersed by CO2 bubbling. The effects of various parameters on the latex properties are investigated, including pH, concentration of macro-RAFT agent, using MMA as comonomer and initiator concentration. The results show that replacing only 5 mol% MMA in emulsion polymerization of styrene eliminates the induction time and also has a significant influence on the particle size distribution.
- Subjects
CHAIN transfer (Chemistry); METHACRYLATES; STABILIZING agents; AQUEOUS solutions; POLYMERIZATION; POLYSTYRENE; COPOLYMERS; STYRENE
- Publication
Macromolecular Reaction Engineering, 2017, Vol 11, Issue 1, pn/a
- ISSN
1862-832X
- Publication type
Article
- DOI
10.1002/mren.201600035