Title
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From polyester grafting onto POSS nanocage by ring-opening polymerization to high performance polyester/POSS nanocomposites
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Author
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Abstract
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Polyester-grafted polyhedral oligomeric silsesquioxane (POSS) nanohybrids selectively produced by ring-opening polymerization of ε-caprolactone and L,L-lactide (A.-L. Goffin, E. Duquesne, S. Moins, M. Alexandre, Ph. Dubois, Eur. Polym. Journal, 2007, 43, 4103) were studied as masterbatches by melt-blending within their corresponding commercial polymeric matrices, i.e., poly(ε-caprolactone) (PCL) and poly(L,L-lactide) (PLA). For the sake of comparison, neat POSS nanoparticles were also dispersed in PCL and PLA. The objective was to prepare aliphatic polyester-based nanocomposites with enhanced crystallization behavior, and therefore, enhanced thermo-mechanical properties. Wide-angle X-ray scattering and transmission electron microscopy attested for the dispersion of individualized POSS nanoparticles in the resulting nanocomposite materials only when the polyester-grafted POSS nanohybrid was used as a masterbatch. The large impact of such finely dispersed (grafted) nanoparticles on the crystallization behavior for the corresponding polyester matrices was noticed, as evidenced by differential scanning calorimetry analysis. Indeed, well-dispersed POSS nanoparticles acted as efficient nucleating sites, significantly increasing the crystallinity degree of both PCL and PLA matrices. As a result, a positive impact on thermo-mechanical properties was highlighted by dynamic mechanical thermal analysis. |
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Language
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English
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Source (journal)
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Journal of materials chemistry / Royal Society of Chemistry [London] - Cambridge, 1991 - 2012
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Publication
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Cambridge
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2010
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ISSN
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0959-9428
1364-5501
[online]
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DOI
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10.1039/C0JM00283F
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Volume/pages
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20
:42
(2010)
, p. 9415-9422
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ISI
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000283264500017
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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