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Poly(isobutylene) Nanoparticles via Cationic Polymerization in Nonaqueous Emulsions
Author(s) -
Schuster Thomas,
Golling Florian E.,
Krumpfer Joseph W.,
Wagner Manfred,
Graf Robert,
Alsaygh Abdulhamid A.,
Klapper Markus,
Müllen Klaus
Publication year - 2015
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400401
Subject(s) - cationic polymerization , isobutylene , polymerization , polymer chemistry , materials science , living cationic polymerization , copolymer , emulsion polymerization , pickering emulsion , chemical engineering , nanoparticle , dichloromethane , radical polymerization , chemistry , polymer , organic chemistry , nanotechnology , composite material , solvent , engineering
The preparation of poly(isobutylene) (PIB) nanoparticles via cationic emulsion polymerization is presented. As a requirement, an oil‐in‐perfluoroalkane nonaqueous emulsion is developed, which is inert under the carbocationic polymerization conditions. To stabilize the dichloromethane/hexane droplets in the fluorinated, continuous phase, an amphiphilic block copolymer emulsifier is prepared containing PIB and 1 H ,1 H ‐perfluoroalkylated poly(pentafluorostyrene) blocks. This system allows for the polymerization of isobutylene with number‐average molecular weights (M ¯ n ) up to 27 000 g mol −1 . The particle morphologies are characterized via dynamic light scattering and electron microscopy. ForM ¯ n> 20 000 g mol −1 , the particles exhibit shape‐persistence at room temperature and are ≈100 nm in diameter.