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Colloids Surf B Biointerfaces. 2011 Nov 1;88(1):332-8. doi: 10.1016/j.colsurfb.2011.07.010. Epub 2011 Jul 12.

Miniemulsion polymerizations of n-butyl cyanoacrylate via two routes: towards a control of particle degradation.

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1
Laboratoire de Chimie Physique Macromoléculaire, UMR 7568 CNRS-Nancy University, Nancy, France.

Abstract

This study aimed at determining the influence of the mechanism of polymerization on the molar mass and degradation of poly(n-butyl cyanoacrylate) (PBCA) nanoparticles obtained by miniemulsion polymerization. Therefore, nanoparticles of poly(n-butyl cyanoacrylate) were synthesized via radical and/or anionic miniemulsion polymerization stabilized by Brij®78, a POE based surfactant. Polymerization conditions had little influence on the final diameter while it severely affected the final molar masses of PBCA. An increase of the temperature and of the pH of the continuous phase led to higher molar masses. A further increase was observed when a radical initiator was added in the monomer. The evolution of the molar mass of the synthesized poly(n-butyl cyanoacrylate) was followed as a function of time at pH 7.4 by Size Exclusion Chromatography. As expected, the degradation kinetics strongly depended on the polymerization mechanism (anionic or radical).

PMID:
21802908
DOI:
10.1016/j.colsurfb.2011.07.010
[Indexed for MEDLINE]
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