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Blend formation between homo- and co-polymers at 298.15 k, PMMA-SAN blends

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Abstract

Solution heats in chloroform at 25 °C have been measured experimentally for poly(methylmethacrylate) (PMMA), samples of poly(styrene-co-acrylonitrile) (SAN) containing from 5 to 37 mass% of acrylonitrile, and some PMMA-SAN blends prepared inside the miscibility range. From these data the mixing enthalpies for blend formation were obtained. Use of the mixing heats values in the framework of the Prigogine-Flory-Patterson theory allowed to calculate values of the exchange energy parameters between the components of the blends much more negative than existing literature data. Calculation of binary interaction energy parameters between the single repeat units of the copolymer from the above data, and from model compounds, clearly indicates a strong increase of the intramolecular repulsive energy between nitrile and styrene units of SAN, as compared with the interaction between the corresponding free model molecules.

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Authors and Affiliations

  1. Istituto di Fisica Atomica e Molecolare del C.N.R. Area Della Ricerca di Pisa, Via Alfieri 1, 56010, Ghezzano, Pisa, Italy

    C Cardelli

  2. Dipartimento di Chimica e Chimica Industriale, Via Risorgimento 35, 56126, Pisa, Italy

    G Conti, P Gianni & R Porta

Authors
  1. C Cardelli
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  2. G Conti
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  3. P Gianni
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  4. R Porta
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Correspondence to G Conti.

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Cardelli, C., Conti, G., Gianni, P. et al. Blend formation between homo- and co-polymers at 298.15 k, PMMA-SAN blends . Journal of Thermal Analysis and Calorimetry 71, 353–365 (2003). https://doi.org/10.1023/A:1022870919050

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