Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 71: Issue 2
Blend formation between homo- and co-polymers at 298.15 k, PMMA-SAN blends
Authors:
C Cardelli Istituto di Fisica Atomica e Molecolare del C.N.R. Area Della Ricerca di Pisa Via Alfieri 1 56010 Ghezzano, Pisa Italy Via Alfieri 1 56010 Ghezzano, Pisa Italy

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G Conti Dipartimento di Chimica e Chimica Industriale Via Risorgimento 35 56126 Pisa Italy Via Risorgimento 35 56126 Pisa Italy

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P Gianni Dipartimento di Chimica e Chimica Industriale Via Risorgimento 35 56126 Pisa Italy Via Risorgimento 35 56126 Pisa Italy

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R Porta Dipartimento di Chimica e Chimica Industriale Via Risorgimento 35 56126 Pisa Italy Via Risorgimento 35 56126 Pisa Italy

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Pages:
353–365
Online Publication Date:
31 Oct 2004
Publication Date:
01 Feb 2003
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1022870919050
Keywords:
calorimetry; blends; group contributions; miscibility
Restricted access

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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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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