ISSN:
1573-9171
Keywords:
interpolymer
;
enthalpy
;
entropy
;
Gibbs free energy
;
enthalpy of dissolution and swelling
;
glass transition temperature
;
calorimeter
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Thermodynamic parameters of the interpolymer reaction between poly-1,1,2-trichlorobuta1,3-diene and poly(ethylene imine) giving a polymer-polymer compound (incorporating the starting components in a molar ratio of 1 : 2) have been determined by calorimetry. The enthalpy (ΔH°m), entropy (ΔS°m), and Gibbs function (ΔG°m) for this reaction are negative over the whole temperature range studied. The enthalpy of the reaction in chloroform at 298.15 K is about two times smaller, due to the difference in the enthalpies of dissolution of the starting polymers and the enthalpy of swelling of the interpolymer in the same solvent. The glass transition temperature of the interpolymer lies between those of the starting polymers and coincides with the value calculated from the Fox equation. The heat capacity of the interpolymer is smaller than additive values calculated fromC p ° of the starting polymers. From the experimentally determinedC p ° for the polymers, the thermodynamic functionsC p ° (T),H°(T) − H°(O), andS°(T) were calculated for the 0–330 K temperature range, and their configurational entropiesS c ° were estimated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01435380
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