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Journal of Macromolecular Science, Part A
Pure and Applied Chemistry
Volume 48, 2011 - Issue 10
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Original Articles

Synthesis of Sub-100 nm Nanoparticles by Emulsifier-free Emulsion Polymerization of α-Methylstyrene, Methyl Methacrylate and Acrylic Acid

Shan Jiang Department of Materials Science and Engineering, Changzhou University, Changzhou, China
,
Aiping Sun Department of Materials Science and Engineering, Changzhou University, Changzhou, China
,
Jianping Deng State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
,
Wantai Yang State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China; College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
&
Qiang Yu Department of Materials Science and Engineering, Changzhou University, Changzhou, China
Pages 846-850 | Received 01 Dec 2010, Accepted 01 Apr 2011, Published online: 24 Aug 2011
 
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Abstract

The emulsifier-free emulsion copolymerization of α-methylstyrene (AMS) and methyl methacrylate (MMA) in the presence of functional monomer acrylic acid (AA) was carried out in batch process, giving birth to sub-100 nm nanoparticles. The kinetics of polymerization was investigated. The morphology and size of particles were monitored by TEM. The influences of the functional monomer AA concentration, initiator ammonium persulfate (APS) concentration, and polymerization temperature were studied. It was found that AMS caused a drastic decrease in both the rate of polymerization and the average degree of polymerization. The activation energy calculated from Arrhenius plot turned out to be 83.6 kJ/mol.

Acknowledgements

We gratefully thank the National Science Foundation of China (20574004) for financial support of this work.

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