Synthesis of poly(styrene-dimethylsiloxane) block copolymers: Influence of the phase-separated morphologies on the thermal behaviors

David Rosati 1 Michel-Yves Perrin 1 Patrick Navard 1 Valeria Harabagiu 2 Mariana Pinteala 2
1 CEMEF - Centre de Mise en Forme des Matériaux
2 “Petru Poni” Institute of Macromolecular Chemistry
Abstract : Five polystyrene-poly(dimethylsiloxane) di- and triblock copolymers were prepared by two different methods, a classical anionic polymerization and a cationic polymerization of styrene in the presence of a new macromolecular initiator. Spherical, cylindrical, and lamellar phase-separated morphologies were identified. Their sizes were measured by transmission electron microscopy (TEM) on films obtained from bulk and solvent-cast samples. DSC and TEM show that the phase-separated morphologies are strongly segregated with no long range ordering. The specific microphase surface area, obtained by TEM, is strongly correlated with the broadening of the polystyrene glass transition.
Keywords : Anionic polymerization Cationic polymerization Differential scanning calorimetry Glass transition Macromolecules Morphology Phase separation Plastic films Polystyrenes Silicones Synthesis (chemical) Transmission electron microscopy
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Soumis le : mercredi 9 mars 2011 - 09:40:12
Dernière modification le : lundi 17 février 2020 - 17:40:34

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David Rosati, Michel-Yves Perrin, Patrick Navard, Valeria Harabagiu, Mariana Pinteala. Synthesis of poly(styrene-dimethylsiloxane) block copolymers: Influence of the phase-separated morphologies on the thermal behaviors. International Journal of Biological Macromolecules, Elsevier, 1998, 31 (13), pp.Pages 4301-4308. ⟨10.1021/ma971577c⟩. ⟨hal-00574892⟩

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