Heat of solution of amorphous polymers in θ - solvents

Heats of mixing (ΔHm) for three polymers in three solvents have been measured using a TIAN‐CALVET microcalorimeter. ΔHm are positive (endothermic) and are shown to be in good quantitative agreement with HILDEBRAND‐SCATCHARD expectations. These results offer the occation to consider a new contributio...

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Bibliographic Details
Published in:Die Makromolekulare Chemie 1966-03, Vol.92 (1), p.114-121
Main Authors: Bianchi, Umberto, Pedemonte, Enrico, Rossi, Corrado
Format: Article
Language:English
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Summary:Heats of mixing (ΔHm) for three polymers in three solvents have been measured using a TIAN‐CALVET microcalorimeter. ΔHm are positive (endothermic) and are shown to be in good quantitative agreement with HILDEBRAND‐SCATCHARD expectations. These results offer the occation to consider a new contribution to ΔHm which has ben ignored in currently accepted thermodynamic theories and which could explain the large deviations from the HILDEBRAND treatment of ΔHm, occurring for polymer/non Θ‐solvent systems. Für drei Polymere wurden in drei Lösungsmitteln die Mischungswärmen (ΔHM) mit einem TIAN‐CALVET‐Mikrokalorimeter gemessen. Die ΔHm‐Werte sind positiv (endotherme Systeme) und lassen sich quantitativ durch die HILDEBERAND‐SCATCHARD‐Beziehung erfassen. Das andersartige Verhalten von Polymeren in Nicht‐Θ‐Lösungsmitteln kann durch einen Beitrag zu ΔHm erklärt werden, der bei den bisherigen thermodynamischen Theorien unberücksichtigt blieb.
ISSN:0025-116X
0025-116X
DOI:10.1002/macp.1966.020920108