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Journal of Dispersion Science and Technology Volume 30, 2009 - Issue 8
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Original Articles

The State of NaOH in NaOH/Poly(Sodium Acrylate) Composite

Fu-Qiang Jina State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing, China
,
Ru Yanga State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing, China
,
Jian-Chun Zhangb The Quartermaster Institute of General Logistics Department of CPLA , Beijing, China
,
Min Lia State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing, China
,
Xin-Min Haob The Quartermaster Institute of General Logistics Department of CPLA , Beijing, China
&
Hua Zhangb The Quartermaster Institute of General Logistics Department of CPLA , Beijing, China
Pages 1148-1151 | Received 22 Feb 2008, Accepted 18 Mar 2008, Published online: 03 Aug 2009
 
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Abstract

NaOH/poly(sodium acrylate) composites were prepared by in situ polymerization of acrylic acid with an overneutralization level by adding excess NaOH. The composites were studied by XRD, IR and 23Na MAS NMR spectroscopy. The results showed that the high neutralization degree (>100%) may lead to a complete polymerization. Both XRD and 23Na MAS NMR spectra did not show any peaks of phase-separated NaOH or Na2CO3 until the neutralization degree was up to 217.5%. It can be presumed that the aggregates of Na+ ions can contain approximately two Na+ units for every carboxyl group before the phase separation.

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