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Miscibility as a function of copolymer composition in blends of a random copolymer and a homopolymer

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Abstract

Random copolymers of n-butyl acrylate (BA) and cyclohexyl acrylate (CHA) were synthesized by solution polymerization in cyclohexane. Blends of polystyrene with the poly(CHA-stat-BA) copolymers were prepared by solvent casting and coprecipitation. The miscibility of the blends was characterized by means of differential scanning calorimetry. While blends with a low content of CHA in the copolymer showed two characteristic glass-transition temperatures of the corresponding blend components, those with a CHA content higher than 70% presented good compatibility. Phase separation of the miscible blends took place after annealing at 200 °C for 1 h, which implies an upper miscibility gap (lower critical solution temperature).

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Acknowledgements

The authors are indebted to Reimund Stadler (deceased) for stimulating discussions. Financial support was given by the Chinese Embassy in Germany and the Deutsche Forschungsgemeinschaft.

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Author notes

  1. Jianjiang Hu

    Present address: Department of Materials Science, National University of Singapore, Blk S7-03-06, Lower Kent Ridge Road, 117543, Singapore

  2. Volker Abetz

    Present address: Makromolekulare Chemie II, Universität Bayreuth, 95440, Bayreuth, Germany

Authors and Affiliations

  1. Institut für Organische Chemie, Johann-Joachim-Becher-Weg 18–22, 55099, Mainz, Germany

    Jianjiang Hu & Volker Abetz

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  1. Jianjiang Hu
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  2. Volker Abetz
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Correspondence to Volker Abetz.

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Hu, J., Abetz, V. Miscibility as a function of copolymer composition in blends of a random copolymer and a homopolymer. Colloid Polym Sci 282, 716–721 (2004). https://doi.org/10.1007/s00396-003-1002-2

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  • DOI: https://doi.org/10.1007/s00396-003-1002-2

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