Numerical evaluation of the thermodynamic equation for the state of polymer melts from pressure-volume-temperature (pVT) data

Numerical evaluation of the thermodynamic equation for the state of polymer melts from pressure-volume-temperature (pVT) data

A refinement of the numerical calculation for reducing PVT parameters has been given by using the Marquardt--Levenberg nonlinear least-squares algorithm. Three different polymers were analyzed and evaluated by the proposed method. The precision of the PVT measurement makes sense for an improvement o...

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Veröffentlicht in:Polymer bulletin (Berlin, Germany) Germany), 1988-12, Vol.20 (6), p.569-576
Hauptverfasser: LUCCHELLI, E, TOMKA, I, VANCSO, G, YEH, P. L
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Zusammenfassung:A refinement of the numerical calculation for reducing PVT parameters has been given by using the Marquardt--Levenberg nonlinear least-squares algorithm. Three different polymers were analyzed and evaluated by the proposed method. The precision of the PVT measurement makes sense for an improvement of the evaluation by applying the Marquardt algorithml. 12 ref.--AA
ISSN:0170-0839
1436-2449
DOI:10.1007/BF00263674