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Issue 25, 2012
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Towards homogeneous dynamics in incompatible blends by selective transesterification

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Abstract

The evolution from two component dynamics towards homogeneous dynamics in originally incompatible blends of biodegradable aliphatic polyesters has been followed by dielectric spectroscopy. Transesterification reactions are responsible for the compatibilization process. However, our results indicate that the segmental dynamics are strongly modified even before any transesterification process is detected by 13C-NMR. This modification in the dynamics can be explained by incipient reactions at the interphase between the homopolymer rich regions, which further evolves to the interior of those phases by the formation of block copolymer of gradually decreasing block length. This process finally produces a random copolymer that forms a single phase with a single segmental relaxation.

Graphical abstract: Towards homogeneous dynamics in incompatible blends by selective transesterification

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Publication details

The article was received on 21 Feb 2012, accepted on 24 Apr 2012 and first published on 21 May 2012


Article type: Paper
DOI: 10.1039/C2SM25403D
Soft Matter, 2012,8, 6723-6730

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    Towards homogeneous dynamics in incompatible blends by selective transesterification

    D. E. Martinez-Tong, M. Soccio, A. Sanz, T. A. Ezquerra, N. Lotti, A. Munari and A. Nogales, Soft Matter, 2012, 8, 6723
    DOI: 10.1039/C2SM25403D

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