Journal
POLYMER
Volume 46, Issue 19, Pages 8573-8581Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2005.04.082
Keywords
reversible addition-fragmentation chain transfer; chain transfer agents; X-ray diffraction
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Reversible addition-fragmentation chain transfer (RAFT) polymerizations were performed in the presence of organically modified clays and successfully prepared polystyrene-, poly(methyl methacrylate)-, and poly(n-butyl acrylate)-layered silicate nanocomposites. The polymers had well-defined molecular weights and low polydispersities, as expected from RAFT polymerizations. The morphology of polystyrene-, and poly(n-butyl acrylate)-nanocomposites were found to be exfoliated using montmorillonite modified with N,N-dimethyl-n-hexadecyl-(4-vinylbenzyl) ammonium (MMT-VB16). In the case of PMMA nanocomposite, the structure was a mixture of intercalated and exfoliated when MMT-VB16 was used, while the use of montmorillonite modified with 2-methacryloyloxyethyl-hexadecyldimethyl ammonium (MMT-MA16) resulted in exfoliation. (c) 2005 Elsevier Ltd. All rights reserved.
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