Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 70: Issue 3
Analog calorimetry and UNIQUAC group contributions approaches to the miscibility of pvc with eva copolymers
Authors:
L. Bernazzani Dipartimento di Chimica e Chimica Industriale Via Risorgimento 35 56126 Pisa Italy Via Risorgimento 35 56126 Pisa Italy

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C. Cardelli Istituto di Fisica Atomica e Molecolare del C.N.R Area della Ricerca di Pisa, Via Alfieri 1 56010 Ghezzano, Pisa Italy Area della Ricerca di Pisa, 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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Pages:
927–947
Online Publication Date:
03 Nov 2004
Publication Date:
01 Oct 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1022228925159
Keywords:
excess enthalpies; mixtures; polymer blends; analog calorimetry; group contributions; model compounds
Restricted access

Abstract  

The miscibility of blends of poly(vinyl-chloride) (PVC) with poly(ethylene-co-vinyl acetate) (EVA) was investigated through analog calorimetry and a group contribution procedure based on the UNIQUAC model. The group contribution parameters quantifying the pair interactions between the structural features of the above polymers were calculated from experimental excess enthalpies of a series of binary mixtures of chlorocompounds, esters and hydrocarbons. Enthalpy data were also collected for the ternary mixtures (2-chloropropane+ethyl acetate+n-heptane) and (2-chlorobutane + methyl acetate+n-heptane), chosen as possible models for the studied macromolecular mixtures. The miscibility window of the PVC-EVA blends is fairly predicted by the group contribution method. It is also acceptably predicted by the enthalpic behaviour of the first ternary set, but only when the latter is calculated with binary data. A slightly narrower miscibility range is predicted by the binary interaction model. The results of these procedures are compared and the higher reliability of the group contribution procedure is emphasized in terms of its capability to reproduce the exact structure of the macromolecules and the non-univocal choice of the model molecules involved in the analog calorimetry approach.

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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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